Arthropoda
Classification
-
Animalia
- Arthropoda
Aayemenaytcheia Lieberman, 1994
Abadiellidae
Abakania Poletaeva, 1973
Abakanopleura Sivov, 1955
Abatobius Chamberlin, 1917
Abdulinaspis Ergaliev, 1980
Abharella Wittke, 1984
Abia Poletaeva, 1972
Absia Leach, 1825
Acadiocarididae
Acadolenus Sdzuy, 1967
Acanthagnostus Qian, 1982
Acanthalomina Prantl & Pribyl, 1949
Acanthaspides Ivshin, 1956
Acanthocephalus Tilesius, 1818
Acanthocercus Liévin, 1848
Acanthocnemis Hawle & Corda, 1847
Acanthocypris Claus, 1892
Acanthogramma Hawle & Corda, 1847
Acantholenus Matthew, 1898
Acanthometopus Lu & Qian, 1983
Acanthomicmacca Hupé, 1953
Acanthophillipsia Yuan, Zhao & Mao, 1992
Acanthopleurella Groom, 1902
Acanthotarsius Verhoeff, 1931
Acanthotribola Czerniavsky, 1878
Acastava Richter & Richter, 1954
Acastellina Richter & Richter, 1954
Acastidae Delo, 1935
Acastocephala Shergold, 1966
Acastoides Delo, 1935
Acastopyge Tomcyzkowa, 1971
Acerocarina Poulsen, 1951
Aceroproetus Kolobova, 1988
Acheilops Ulrich, 1931
Achesium Rafinesque, 1815
Achistodesmus Pocock, 1898
Achylsopsis Fritz, 1968
Acidostomella Schellenberg, 1926
Acidusus Öpik, 1979
Acontheus Angelin, 1851
Acrocephalaspina Ergaliev, 1980
Acrocephalinella Romanenko, 1968
Acrocephalitidae
Acrodirotes Öpik, 1967
Acrohybus Raymond, 1937
Acrokurzia Brooks, 1953
Acrometidae
Actaana Klunzinger, 1913
Actaeaus Simonetta, 1970
Actaeus Simonetta, 1970
Actoecia Dana, 1853
Aculeodiscus Snajdr, 1951
Acuminobrachycythere Puckett, 2002
Acutaspis Repina, 1976
Acutatagnostus Ergaliev, 1980
Acutimetopus Hahn & Hahn, 1985
Adastocephalum Mitchell, 1919
Adelobole Hahn, Hahn & Müller, 2003
Adelocaris Packard, 1890
Adelogonus Öpik, 1967
Adelophthalmidae
Adelopus Rafinesque, 1832
Adenoschendyla Brölemann & Ribaut, 1911
Adeuscalpellum Joleaud, 1914
Adiaksis Zhuravleva, Repina & Khomentovsky, 1959
Adiastylis Stebbing, 1912
Adjutoridae
Aedotes Öpik, 1967
Aegeridae
Aegites Ammon
Aegrotocatellus Adrain & Edgecombe, 1995
Aegunaspis Khairullina, 1975
Aenigmacarididae
Aeonia Burmeister, 1843
Aethedionide Zhou & Ju, 1983
Aetheria Agassiz, 1846
Aethia Qian & Zhou, 1984
Afghancephalites Weippert & Wolfart, 1968
Afghanocare Wolfart, 1975
Afghanopyge Durkoop, Mensink & Plodowski, 1967
Afrocythere Klie, 1935
Afroniscus Paulian de Félice, 1940
Afrops Alberti, 1983
Agalatus Lisogor, 1961
Agaso Cobbold, 1934
Agelagma Öpik, 1967
Agelinidae
Agema Riley, Hill & Huchzermeyer, 1997
Agerina Tjernvik, 1956
Agerochus Rafinesque, 1815
Aglagalia Hupé, 1960
Aglauros Costa, 1854
Agnostardis Öpik, 1963
Agnostascus Öpik, 1967
Agnostidae M'Coy, 1849
Agnostoglossa Öpik, 1967
Agnostogonus Öpik, 1967
Agnostonymus Öpik, 1979
Agraulaeva
Agraulidae
Agrauloides Howell, 1937
Agraulopsis Ruzicka, 1940
Aguaraya Rusconi, 1954
Aguilarella Benedetto, 1979
Agustina Salas, 2002
Agyrenella Ivshin, 1957
Aiaiaspis Nazarov, 1973
Aidarella Lermontova, 1951
Ainasuella Maksimova, 1978
Ainiktozoon Scourfield, 1937
Ainoa Männil, 1958
Aipotropus Chamberlin, 1920
Aistagnostus Xiang & Zhang, 1985
Ajacicrepida Zhang Wentang & Jell, 1987
Ajrikina Krys'kov, 1963
Akbashichia Korobov, 1989
Aksapyge Lisogor, 1977
Aksuaspis Zhou, Zhou & Yuan, 1998
Aktugaiella Ergaliev, 1980
Alacealus Repina, 1959
Alacephalus Repina, 1960
Alanella Boucek, 1936
Alaskalethe Hahn & Hahn, 1991
Alataja Poletaeva, 1959
Alataupleura Lisogor, 1977
Alataurus Repina, 1964
Alaudaella Zenkova, 1999
Albacania
Albadesmus Wilson & Anderson, 2004
Alberticoryphe Erben, 1966
Alborsella Kushan, 1973
Albunhippe Agassiz, 1845
Alcaldops Arbizu, 1979
Alceste Hawle & Corda, 1847
Alcimene Gistl, 1848
Aldonellus Koptev, 1969
Alekcinella Ivshin, 1962
Alemtejoia Kobayashi, 1943
Alibius Chamberlin, 1952
Aliger Howell, 1937
Aligerites Howell, 1942
Alimerichthus Guérin-Ménéville, 1857
Allaruella Krommelbein, 1975
Allassodesmus Chamberlin, 1923
Allobodochus Öpik, 1979
Allobothropolys Verhoeff, 1907
Allocotichnus Osgood, 1970
Alloctops Rafinesque, 1832
Allodiastylus Hale, 1936
Alloillaenus Liu, 1982
Alloleiostegium Zhou Zhiyi & Zhang Jinlin, 1978
Allostraca Bassler, 1932
Allostracites Pribyl, 1953
Almenia Hou & Bergstrom, 1997
Alokistocaridae Resser, 1939
Alokistocaropsis Repina, 1965
Alokobius Attems, 1927
Alomataspis Öpik, 1967
Alreboaspis Pribyl & Vanek, 1985
Alsataspididae
Alsataspis Turner, 1940
Altaepeltis Maksimova, 1968
Altaesajania Maksimova, 1978
Altaiaspis Ivshin, 1960
Altajaharpes Petrunina, 1984
Altajaspis Elkin, 1965
Altikolia Khairullina, 1962
Altiplanelaspis Pribyl & Vanek, 1980
Altobius Chamberlin, 1943
Altocrangonyx Schellenberg, 1937
Alueva Lotze, 1958
Alveus Hamilton, 1942
Alvis Münster, 1840
Alwynulus Tripp, 1967
Amanonyx Bate, 1856
Amazonacytheridea Purper, 1979
Amblyrrhynchotus Tilesius, 1818
Ambolus Ikeya, Jellinek & Tsukagoshi, 1998
Amecephalites Eddy & McCollum, 1998
Amechilus Ross, 1951
Americare Lochman & Hu, 1960
Amgaspidae
Amgaspididae
Amgaspis Chernysheva, 1956
Amginia Pegel, 1981
Amginoerbia Chernysheva, 1976
Amginouyia Chernysheva, 1956
Amiaspis Lochman, 1944
Amicus Koroleva, 1967
Amimones Billberg, 1820
Ammagnostidae Opik, 1967
Ammonicolax Pearce, 1842
Ammonocolax Agassiz, 1846
Amorphella Rozova, 1963
Ampellatocephalina
Amphihys Angelin
Amphikoilum Novozhilov, 1953
Amphiplectes Carus, 1888
Amphipronoe Spence Bate, 1862
Amphitryon Hawle & Corda, 1847
Amphorella
Amphoriops Hammann & Leone, 1997
Amphotonella Kobayashi, 1942
Amplobius Chamberlin, 1941
Ampullatocephalina Lu & Qian, 1983
Ampyxella Dean, 1960
Ampyxinella Koroleva, 1959
Amquia Rasetti, 1946
Amunicor Schallreuter, 1999
Amurticephalus Shah, Parcha & Raina, 1991
Amygdalina Costa, 1853
Amymone Müller, 1776
Amynilyspedidae
Amynome Rafinesque, 1815
Amzasskiella Poletaeva, 1960
Anacheiruraspis Nan, 1985
Anacheirurus Reed, 1896
Anacopodia
Anadenophilus Verhoeff, 1928
Anadoxides Matthews, 1899
Anakamptopus Verhoeff, 1940
Analocaspis Owens, 1970
Anambon Landrum & Sherwin, 1976
Anapliomera DeMott, 1987
Anapliomerella
Anarthrus Tilesius, 1818
Anatifa Bruguière, 1789
Anatifarius Duméril, 1806
Anatifer Desjardins, 1831
Anatifera Meuschen, 1787
Anatifigenus Renier, 1804
Anatium Link, 1807
Anatolia Tunoglu, 2002
Anaximander Fortey, 1974
Anchonotellus
Anchorella Nordmann, 1832
Anchylura Agassiz, 1845
Ancistropus Verhoeff, 1943
Ancorella Nordmann, 1832
Ancyginaspis Pribyl & Vanek, 1985
Ancylura Agassiz, 1846
Ancyropyge Clarke, 1891
Andastikus
Andegavia Pillet, 1973
Anderssonella Kobayashi, 1936
Anderssonia Sun, 1925
Andesaspis Kobayashi, 1935
Andinacaste Eldredge & Branisa, 1979
Andinopyge Branisa, 1965
Andrarinidae
Andreaspis Struve, 1962
Andresia Hinz-Schallreuter, 1993
Anebolithus Hughes & Wright, 1970
Anemocephalops Ivshin, 1962
Anemocephalus Ivshin, 1955
Aneuacanthus Angelin, 1852
Aneucanthus Angelin, 1852
Aneumeritius Verhoeff, 1931
Anexopoditius Verhoeff, 1942
Anginouyia Savitskii, Egorova & Shabanov, 1974
Anglagnostus Howell, 1935
Anglibole Archinal, 1991
Angolophilus Chamberlin, 1951
Angsiduoa Zhou, 1996
Angustaeva
Angusteva Hupé, 1953
Angustibole Hahn, 1965
Angustolenellus Palmer & Repina, 1993
Anhuiaspis Qian & Qiu, 1983
Anisonotella Whittington, 1952
Ankitokazocaris Arduini, 1990
Annamitella Mansuy, 1916
Anobius Chamberlin, 1922
Anodontastoma Tömösváry, 1883
Anolena Ranzani, 1820
Anomalocaridae
Anomalocarididae
Anomalocephalus Deiss, 1939
Anomalonema Raymond, 1946
Anomaloniscus Dollfus, 1893
Anomocaraspis Ivshin, 1953
Anomocarellidae
Anomocarellius Khairullina, 1973
Anomocaridae Poulsen, 1927
Anomocarioides Lermontova, 1940
Anomocariopsis Sivov, 1955
Anonyme Agassiz, 1846
Anopherusa Wilson, 1924
Anopocare Angelin, 1854
Anopocodia Öpik, 1967
Anopsites Rafinesque, 1832
Ansipe Schallreuter, 1996
Antagmella Suvorova, 1974
Antagmellus Lermontova, 1959
Antagmidae
Antagmopleura Lermontova, 1960
Antagnellus Lermontova, 1959
Antarctoniscus Paulian de Felice, 1940
Antatlaeva Hupé, 1960
Anthes Goldfuss, 1843
Anthracodesmus Peach, 1899
Anthracojulidae
Anthracojulus Fritsch, 1899
Anthracomysis Van Straelen, 1922
Anthracopeltis Boulay, 1880
Anthracosironidae
Anthrapalaemon Salter, 1861
Antiparaparchites Coryell & Rogatz, 1934
Antitomis Gürich, 1896
Antroplotes Apfelbeck, 1914
Anuloides Ivshin, 1962
Anuroleptophyllum Attems, 1901
Aocaspis Dolambi & Gond, 1992
Aotagnostus Öpik, 1979
Aotiaspis Kobayashi, 1960
Apachilites Ivshin, 1962
Apagis Sars, 1897
Apalurus Rafinesque, 1815
Apankura Vaccari, Edgecombe & Escudero, 2004
Aparchona Hinz-Schallreuter, 1993
Apareiulus Brölemann, 1897
Apatobolina Ulrich & Bassler, 1923
Apatocephalus Wiman, 1905
Apatokephalina Sivov, 1955
Apatokephaloides Raymond, 1924
Apatokephalops Lu, 1975
Apatokephalopsis Lermontova, 1940
Apatonephalus
Apedopyanus Raymond, 1937
Apeltes Lilljeborg, 1860
Apenninicylindrus Verhoeff, 1941
Aphantomartidae
Aphelaspidella Rasetti, 1965
Aphelaspididae
Apheloides Ivshin, 1962
Apheromeris Silvestri, 1917
Aphthartus von Meyer, 1847
Apiflabellum Sun, 1993
Apiocephalus Luo & Hu, 1999
Aplexura Rozova, 1963
Aplopode Hesse, 1869
Aplotaspis Henderson, 1976
Apolichas Kobayashi & Hamada, 1974
Apollonaspis Petrunina, 1975
Apomeritius Verhoeff, 1931
Apomodocia Hu, 1971
Aponileus Hu, 1963
Apoplanias Lochman, 1964
Aporophilus Attems, 1903
Appendicysta Hahn, Hahn & Yuan, 1989
Aprathia Hahn & Brauckmann, 1975
Aptychoides Nicholson & Etheridge, 1880
Arachnida Cuvier, 1812
Araeocephalus Repina, 1964
Araiocaris Pribyl & Vanek, 1980
Araiopleura Harrington & Leanza, 1957
Araneonella Dybowski, 1926
Aratidecthidae
Arator Nikolaisen, 1991
Araucosia Verhoeff, 1939
Arbataspis Sivov, 1955
Arcaurila Ruggieri, 1995
Archaeagnostus Kobayashi, 1939
Archaeaspidae
Archaeaspididae Repina, 1979
Archaeastacus Bate, 1884
Archaeharpes Singleton, 1953
Archaeocoryphe Hahn, Hahn & Gawlick, 1995
Archaeoniscidae
Archaeopilumnus Rathbun, 1919
Archaeopleura Ramsköld, 1991
Archaeops Hupé, 1953
Archaeuloma Lee, 1978
Archeobius Chamberlin, 1952
Archicambala Cook, 1896
Archidesmus Peach, 1882
Archikainella Liu, 1982
Archipolyartemia Daday, 1910
Archiscudderia Fritsch, 1899
Architarbidae
Archizoea Dohrn, 1870
Arcibairdia Gramm, 1997
Arcticeraurinella Pribyl & Vanek, 1985
Arcticormistonia Lieberman, 1994
Arctinuroides Phleger, 1936
Arctipeltis Maksimova, 1968
Arcuata Steininger, 1831
Arcuolenellus Palmer & Repina, 1993
Arcuolimbus Palmer, 1955
Ardenita Sidaravichene, 1992
Ardmorea Bradfield, 1935
Arduennella Wenndorf, 1990
Arduennops Struve, 1972
Areia Barrande, 1872
Areiaspis Pribyl & Vanek, 1964
Arethusa Barrande, 1846
Argentinops Pribyl & Vanek, 1980
Argentopyge Baldis, 1972
Arglina Khairullina, 1970
Arhobella Schallreuter, 2001
Ariaspis Wolfart, 1974
Arion Barrande, 1846
Arionides Barrande, 1847
Aristarius Öpik, 1979
Aristobeggia Lamont, 1978
Aristocaris Tolmachoff, 1926
Aristoharpes Whittington, 1950
Aristokainella Zhou Zhiyi & Zhang Jinlin, 1978
Aristoscaris Tolmachoff, 1930
Aristozoidae
Armadillus Illiger, 1798
Armaechmina Schallreuter, 2000
Armeniobrachiulus Lohmander, 1936
Armeniophyllum Lohmander, 1932
Armida Risso, 1826
Armonia Walcott, 1924
Armorigreenops Lieberman & Kloc, 1997
Aroeocephalus
Arpaschmidtella Meidla, 1996
Arraphus Angelin, 1854
Arrhabdotus Attems, 1930
Arrhenaspis Qian Yiyuan, 1985
Artemiella Daday, 1910
Artesiocythere Krommelbein, 1975
Arthricocephalites Lu, Zhang et al., 1974
Arthricocephalus Bergeron, 1899
Arthrodictynidae
Arthropleuridae
Arthropleurion Scudder, 1891
Arthrorhabdinus Verhoeff, 1907
Arunella Brady, 1913
Asaphagus Troost, 1834
Asaphellina
Asaphelloides Kobayashi, 1937
Asaphidae Burmeister, 1843
Asaphides Zelizko, 1935
Asaphiscidae Raymond, 1924
Asaphoidichnus Miller, 1880
Asaphoon Hutchison & Ingham, 1967
Asaphopsoides Hupé, 1955
Ascionepea Oplk, 1967
Ascopeltis
Asiagena Maksimova, 1975
Asiatella Repina, 1964
Asilluchus Öpik, 1963
Asiocephalus Palmer, 1968
Asiodesmus Verhoeff, 1926
Asmussiella Novozhilov, 1955
Asope Rafinesque, 1815
Asperrissimocythere Monostori, 1998
Aspidaecia Giard & Bonnier, 1889
Aspidaeglina Holub, 1911
Aspidocaris Reuss, 1867
Aspidochuangia Lu & Qian, 1983
Aspidograpsus Rathbun, 1917
Aspidoligia Verhoeff, 1926
Aspidolites Conrad, 1841
Aspiodolites Vogdes, 1925
Astacoderma Harley, 1861
Astacolithus Gesner, 1758
Astenaspis
Astenocypris Müller, 1912
Asteraspis Kobayashi, 1935
Asterolambus Sakai, 1938
Asteromajia Nan & Chang, 1982
Asthenaspis Suvorova, 1959
Astodesmus Verhoeff, 1926
Astrolepas Gray, 1825
Astroproetus Begg, 1939
Asturiaspis Sdzuy, 1967
Astyages Angelin
Asymmozona Becker & Blumenstengel, 1997
Atelelepas Joleaud, 1916
Ateloxynaspis Joleaud, 1916
Athabaskiella Kobayashi, 1942
Athropleurion Goldenberg, 1877
Atopasaphus Shergold, 1971
Atopiaspis Geyer, 1998
Atopina Korobov, 1966
Atopophacops Zhou Zhiquiang & Campbell, 1990
Atratebia Shergold, 1975
Atropicaris Arduini & Brasca, 1984
Atypopeneus Alcock, 1905
Audumla Schallreuter, 1995
Augodesmus Cook, 1896
Augur Gistl, 1848
Aulacodigma Öpik, 1967
Aulacodigmatidae
Aulacodiscus Westergård, 1946
Aulacoparina Hintze & Jaanusson, 1956
Aulacopleurella Alberti, 1981
Aulacopleuridae Angelin, 1854
Aulacopleurina Pribyl, 1949
Aulacopleuroides Chu & Zhang, 1979
Aulacosoma Attems, 1895
Aura Münster, 1839
Auricula Sun, 1993
Aurifera de Blainville, 1816
Auris Neviani, 1930
Auritama Öpik, 1967
Auritamiidae
Auritella Leach, 1818
Austosinia
Australoacaste Benedetto & Martel, 1978
Australoleaia Novozhilov, 1954
Australomyttonia Baldis & Pothe, 1995
Australops Baldis, 1972
Australopyge Harrington & Leanza, 1957
Australoscutellum Chatterton & Campbell, 1980
Australurus Ramsköld, 1986
Austriocaris Glaessner, 1931
Austrokrithe Hartmann, 1994
Austrolimulidae
Austronisimus Barnard, 1931
Austrosinia Zhang Wentang & Jell, 1987
Autolichas Reed, 1924
Avalanchurus Edgecombe & Chatterton, 1993
Avalonia Walcott, 1889
Avihomola Van Straelen, 1925
Avonaspis Lochman, 1940
Avonina Lochman, 1936
Avoninidae
Awaria Edgecombe & Fortey, 2000
Axelheibergella Briggs, 1997
Aytounella Lamont, 1978
Azygethus Chamberlin, 1920
Babakovia Sivov, 1955
Babinops Feist & Becker, 1997
Badainjaranaspis Lu, Zhou & Zhou, 1986
Badainjaranspis
Badroulboudour Leigh-Sharpe, 1937
Bagongshania Lin, 1983
Bagradia Repina, 1964
Baikadamaspis
Baikonuraspis Ergaliev, 1983
Bailielloides Kobayashi & Hamada, 1972
Bairdestheria Raymond, 1946
Bajanaspis Ivshin, 1978
Bajangoliaspis Sivov, 1960
Bajulus Gistl, 1848
Balanarius Duméril, 1806
Balangcunaspis Yuan & Zhao, 1997
Balangia Chien, 1961
Balanigenus Renier, 1804
Balanites Gesner, 1758
Balanitina Schlotheim, 1820
Balderia Robison, 1988
Baliothyreus Tilsley & Owens, 2003
Balnibarbi Fortey, 1974
Balticograptus Boucek & Münch, 1952
Baltocyamus Meidla, 1995
Baltoparadoxides Snajdr, 1986
Bancroftolithus Baldis & Pothe, 1995
Bandalaspis Ivshin, 1962
Baniaspis Destombes, 1972
Banilatites Destombes, 1972
Banqiaoites Yin, 1978
Baojingia Yang, 1978
Bapingaspis Yuan, 1988
Baritella Orlov, 1997
Barklyella Shergold, 1969
Barrandagnostus Ivshin, 1960
Barrandeopeltis Pribyl & Vanek, 1984
Bartoninus Tripp, 1962
Bartonius Ortmann, 1905
Basanellus Repina, 1960
Bashania Qiu, 1983
Basilicoides Harrington, 1937
Bassleria Harlton, 1929
Basslerina Moore, 1929
Batchatiella
Batenioides Repina, 1960
Batenoides
Bathybalanus Hoek, 1913
Bathycheilidae
Bathyeuchaeta Brodski, 1950
Bathyholcus Rasetti, 1961
Bathynotidae
Bathyocos Sundbe, 1994
Bathyonyx Vejdovský, 1905
Bathytropina Verhoeff, 1908
Bathyuridae
Bathyurina Poulsen, 1937
Bathyuriscellus Lermontova, 1951
Bathyuriscina Poletaeva, 1959
Bathyuriscops Keller & Lisogor, 1954
Bathyuriscopsis Suvorova, 1960
Battus Dalman, 1826
Batyraspis Apollonov & Tschugaeva, 1983
Baudallia Stimpson, 1854
Bdellotus Cook, 1896
Beckjennites Becker, 2004
Beggaspis Pribyl & Vanek, 1981
Beigongia Qiu, 1983
Beikedamaspis
Beikuangaspis Zhang, 1983
Beishanella
Beleckella Hahn, Hahn & Brauckmann, 1992
Belenops Eldredge & Branisa, 1980
Beleus Leach, 1825
Bellaspis Rasetti, 1945
Belliceps Repina, 1966
Bellinuridae
Belotelsonidae
Belsuops Nikitin, Apollonov & Tsai, 1968
Beltella Lake, 1919
Benedettia Toro & Monaldi, 1981
Benesovella Chlupac, 1969
Benina Carbonnel, de Klasz, de Klasz, Horvath, Lang & Oyede, 1996
Benisymmetricythere Carbonnel, de Klasz, de Klasz, Horvath, Lang & Oyede, 1996
Benxiaspis Guo & An, 1982
Beothuckia Ludvigsen, Westrop & Kindle, 1989
Bergamia Whittard, 1955
Bergerolimbus Hupé, 1960
Bergeronopsis Hupé, 1960
Berkutaspis Lisogor, 1977
Berla White, 1847
Bernia Frederickson, 1949
Bernicella Frederickson, 1949
Bernicla Röding, 1798
Bernix Jones, 1883
Bessazoon Curtis & Lane, 1998
Bestjubella Ivshin, 1962
Bettonia Whittard, 1956
Bettonolithus Morris, 1988
Bhatiana Mannikeri, 1996
Biaverta
Biavertia Öpik, 1967
Bicarinella Rode, Lieberman & Rowell, 2003
Bicaspis Resser, 1938
Bicella Rasetti, 1955
Biceratopsidae Pack & Gayle, 1971
Bicornipyge Lisogor, 1961
Bicyclopyge Horbinger & Vanek, 1985
Bidentia Walcott, 1912
Bidimorpha Hinz-Schallreuter, 1993
Bidion Schallreuter & Kruta, 2001
Biflabellum Öpik, 1937
Bifodina Robison & Pantoja-Alor, 1968
Bigotina Cobbold, 1935
Bigotinella Suvorova, 1960
Bigranulella Shaw & Clark, 1968
Bijaspis Petrunina, 1990
Bijelina Romanenko, 1967
Bileaia Kobayashi, 1954
Bilfurakia Melnikova & Michailova, 1999
Billevittia Edgecombe & Ramskold, 1996
Billingsaspis Resser, 1935
Bilobites Rafinesque, 1831
Binella Semashko, 1969
Binervus Sun, 1993
Binodaspis Lermontova, 1951
Binodiopsis Schallreuter, 1995
Biragnostus Pokrovskaya, 1960
Birdsallela Coryell & Booth, 1934
Birmanitella Kobayashi, 1960
Bisnaeus Sowerby, 1839
Bisneus Sowerby, 1839
Bitrium Schallreuter, 2001
Bitumulina Osmolska, 1970
Blackwelderiella Sun, 1937
Blainiopsis Poulsen, 1947
Blandiaspis Qian, 1983
Blandicephalus Palmer, 1955
Blanodalmanites Kobayashi & Hamada, 1972
Blayacina Cobbold, 1932
Blodgettia Hahn & Hahn, 1992
Blosyropsis Whittington, 1965
Blountiella Resser, 1938
Blountina Lochman, 1944
Blystagnostus Öpik, 1961
Bodenbenderia Harrington & Leanza, 1957
Boeckops Chlupac, 1972
Bohemaspis Horbinger, 1986
Bohemilla Barrande, 1872
Bohemillidae
Bohemina Snajdr, 1953
Bohemiproetus Pillet, 1969
Bohemolichas Pribyl & Vanek, 1972
Bohemopyge Pribyl, 1951
Bohomaspis
Bohuckea Schallreuter & Kruta, 2001
Bojocoryphe Snajdr, 1976
Bojokoralaspis Snajdr, 1984
Bolaspidaspis Rozova, 1964
Bolaspidellus Lazarenko & Datsenko, 1967
Bolaspididae
Bolbochasmops McNamara, 1980
Bolboscaphella Schallreuter, 2001
Bolivianaspis Branisa & Vanek, 1973
Bolivicrania Kobyashi & Hamada, 1986
Boliviproetus Eldredge & Ormiston, 1979
Bollimatia Schallreuter, 2001
Bolusspidaspis
Bondarevites Lazarenko, 1989
Bonnaria Lochman, 1956
Bonniaspis
Bonnima Fritz, 1991
Bonnioides Suvorova, 1964
Bonocephalus Barrande, 1846
Borealarges Adrain, 1994
Borealaspis Ludvigsen, 1976
Borealia Maksimova, 1977
Boreoscutellum Pribyl & Vanek, 1972
Borkopleura Snajdr, 1984
Bornemannaspis Rasetti, 1972
Bornemannia Walcott, 1908
Bornhholmaspis
Bornholmaspis Pribyl & Vanek, 1985
Borogothus Tjernvik, 1956
Borovikovia Kraskov, 1977
Borthaspidella Rasetti, 1954
Borukaspis Ivshin, 1953 or, 1957
Boruta Wrzesniowski, 1888
Boschchekulia Lermontova, 1951
Boshchekulia
Bosminella Daday, 1903
Bostrichopus Goldfuss, 1836
Bostrychopus Agassiz, 1846
Bothrogeophilus Verhoeff, 1927
Bothrohaplophilus Verhoeff, 1908
Botomella Suvorova, 1958
Botrioides Stetson, 1927
Bouleia Kozlowski, 1923
Bounyongia Etheridge & Mitchell, 1917
Boursella Turner, 1939
Bouvieria Daday, 1913
Bowmania Walcott, 1925
Brabbia Palmer, 1968
Brachampyx Forbes
Bracheioiulus Verhoeff, 1930
Brachioleaic Novozhilov, 1952
Brachipus Costa, 1865
Brachyaspis Salter, 1866
Brachyestheria Novozhilov, 1954
Brachygrapta Novozhilov, 1954
Brachymetopella Kobayashi & Hamada, 1978
Brachymetopidae Prantl & Pribyl, 1951
Brachymetopina Reed, 1893
Brachyopterellidae
Brachypleura Angelin
Brachyptyx Chamberlin, 1920
Brachyurites Schlotheim, 1820
Brachyurus Schlotheim, 1832
Brackebuschia Harrington & Leanza, 1957
Bradorona Matthew, 1902
Bradyfallotaspis Fritz, 1972
Brahmaputrus Verhoeff, 1942
Branchinellites Daday, 1910
Branchiopoda Latreille, 1817
Branchiopusites Goldenberg, 1877
Branchipodites Woodward, 1879
Branchipusites Goldenberg, 1875
Branddysops
Brandysops Horbinger, 1986
Branisaspis Pribyl & Vanek, 1980
Branisella Pribyl & Vanek, 1981
Branta Oken, 1815
Brasilophilus Verhoeff, 1908
Brasilophora Bücherl, 1939
Braunops Lieberman & Kloc, 1997
Bredocarididae
Breizhops Morzadec, 1983
Bremeniana Bassiouni, 2002
Brevantia Meidla, 1996
Breviagnostus Liu, 1982
Brevibole Archinal, 1991
Brevichoides Schallreuter, 1994
Brevileperditia Wang, 1994
Breviredlichia Zhang & Lin, 1980
Breviscutellum Snajdr, 1960
Brevitermierella Hupé, 1953
Briania Edgecombe, 1994
Bridgeia Lochman, 1944
Brillius Brayer, 1952
Brisa Münster, 1839
Brismaeus Gray, 1828
Brisnaeus Gray, 1825
Broeggeria Bancroft, 1933
Brongniatia Eaton, 1832
Brontocephalina Chugaeva, 1972
Brontocephalus Kolobova, 1977
Brotherus Budde-Lund, 1909
Bructeria Schallreuter, 2000
Brutaspis Ivshin, 1962
Brutonia Thomas & Holloway, 1988
Bruxaspis Lamont, 1978
Brylyella
Bubupeltina Snajdr, 1991
Bucksella Howell, 1957
Bufoceraurus Hessin, 1989
Buitella Lazarenko, 1964
Bulajaspis
Bulbocornigella Jones & Foster, 2002
Bulgaroiulus Verhoeff, 1928
Bulkuraspis Repina, 1974
Bullaglabellaspis Repina, 1959
Bullicephalus Pribyl & Vanek, 1971
Bulnibarbi
Bumire Schallreuter, 1998
Bundenbachiellus Broili, 1930
Bunodidae
Burgesina Feist & Talent, 2000
Burgessiidae
Buria Giebel, 1857
Burlingidae
Burlingiidae
Burmarhina Palmen, 1946
Burminresia Laurie, 1996
Burnetiella Lochman, 1958
Burrana Budde-Lund, 1909
Bursulella Jones, 1887
Burtonops
Buttsiella Romanenko, 1967
Buttsina Rozova, 1968
Butyrinia Petrunina, 1990
Bvalbardites
Bynumiella Resser, 1942
Caborcella Lochman, 1948
Cadirhynchus Schlüter, 1862
Caecimunna Richardson, 1908
Caelino Desmarest, 1823
Caenobothrus Attems, 1938
Caganaspis Kolobova, 1986
Cainatops Matthew, 1899
Calagnostus Zhang & Wang, 1985
Calcaria Porat, 1878
Calchaquiana Rusconi, 1956
Calcitronidae
Calculites Fortey, 1983
Calgachia Lamont, 1978
Callantica Sowerby, 1839
Callaonella Kulczycki, 1885
Callaspis Zhang, 1983
Callavalonia Lieberman, 2001
Calliaxius Spence Bate, 1888
Calliaxus Spence Bate, 1888
Callidaspina Pokrovskaya, 1967
Callidaspis Pokrovskaya, 1960
Callinisea Hoeven, 1850
Callocheres Norman, 1905
Calmoniidae
Calocephalites Kurtz, 1975
Calodiscidae
Calopolys Chamberlin, 1941
Calpmenella
Calybole Richter, 1927
Calycinoidia Lu & Chien, 1978
Calycoscutellum Archinal, 1994
Calymaena Berthold, 1827
Calymena Desmarest, 1817
Calymenesum
Calymenia Kolobova, 1978
Calymenidae Burmeister, 1843
Calymenidius Rasetti, 1944
Calymenopsis Berjeron, 1895
Calymmene König, 1825
Calyptocaris Jones & Woodward, 1898
Calyptoceros Huxley, 1856
Calyptopis Dana, 1850
Camarspoides
Cambroinyoella Lieberman, 2001
Cambrophatictor Geyer, 1998
Cambropodus Robison, 1990
Cambropycnogon Waloszek & Dulop, 2002
Cambrunicornia Geyer, 1990
Cammingella
Campropallus
Camptocladus Fenton, 1937
Camptophyllia Gill, 1924
Camsellia Ormiston, 1976
Canadaspididae
Cancapolia Rusconi, 1954
Canceripustula Solovjev, 1961
Cancerites Quenstedt, 1867
Cancrinidae
Candelacypris Baltanas, 2001
Canningella Legg, 1976
Cannoniulus Verhoeff, 1929
Canotagnostus Rusconi, 1951
Canotaspis Poulsen, 1960
Canotiana Rusconi, 1950
Canulocia Mayer, 1903
Caphyra Barrande, 1846
Capitetragonia Pearse, 1952
Capnobius Chamberlin, 1944
Caponidae
Caprellinopsis Stebbing, 1888
Capricornia Engel & Morris, 1996
Caputrotundum Deng & Zhao, 1986
Caracodesmus Verhoeff, 1932
Carausia Hicks, 1872
Carboprimatia Croneis & Funkhouser, 1938
Carcinellus Gregorio, 1930
Carcineretidae
Carcineus Oken, 1815
Carciniellum Strand, 1928
Carcinium Meyen, 1834
Carcinochelus Goldenberg, 1877
Carcinococcus de Natale, 1850
Carcinocystus Bate, 1876
Carcinornis Costa, 1864
Carcinosomatidae
Carcinoxiphias Costa, 1864
Carcinurus Bronn, 1850
Cardiocaris Woodward, 1882
Cariderpestes Whidbourne, 1896
Carinbatea Shoemaker, 1926
Carinobasiliella Pribyl & Vanek, 1980
Carinocranium Dean, 1989
Carinopyge Maksimova, 1955
Carlopsia Lamont, 1978
Carmon Barrande, 1872
Carnegiomysis Tattersall, 1943
Carnicia Richter, 1927
Carniphillipsia Hahn & Brauckmann, 1975
Carnizzia Fohrer, 1997
Carolobius Causey, 1942
Carpiliopsis Fischer-Benzon, 1866
Carrazoides Grandori, 1902
Carrickia Tripp, 1965
Caryon Barrande, 1868
Castexia Mercier, 1937
Castracollis Fayers & Trewin, 2003
Catadoxides Matthew, 1899
Cataplotaspis Yuan & Yin, 1999
Catasolenopleura Qiu, 1983
Catharia Alvaro & Vizcaino, 2003
Cathayanella Yuan & Yin, 1998
Catillicephalidae Raymond, 1938
Catillicephalites Rasetti, 1963
Catinouyia Zhang & Yuan, 1981
Catochia Fortey, 1979
Caulaspina Rozova, 1963
Caulaspis Rozova, 1960
Cavellinella Bradfield, 1935
Cavetia Pillet, 1973
Cavia Sun, 1993
Cayastaia Rusconi, 1954
Cayupania Rusconi, 1958
Caznaia Shergold, 1975
Cedarapis
Cedaraspis Ivshin, 1960
Cedarellus Lazarenko, 1966
Cedariidae
Cekovia Snajdr, 1956
Celascatia Schallreuter, 2000
Celebodiaptomus Brehm, 1933
Celmidae
Celmus Angelin, 1854
Celochovites Pokorny, 1951
Celtencrinurus Evitt & Tripp, 1977
Cenagnostus Howell, 1940
Centauropyge Haas, 1968
Centriproetus Snajdr, 1977
Centropleuridae
Cephalacanthus Lapworth, 1890
Cephalocarida Sanders, 1955
Cephalocoeliaspis
Cephaloculus Lamarck, 1801
Cephalomma Agassiz, 1846
Cephaloxus Sars, 1861
Cephthalmus Rafinesque, 1815
Ceragnostus
Ceratagnostus Whitehouse, 1939
Cerataspides Bonnier, 1899
Ceratevenkaspis Kramarenko, 1952
Ceratolithus Lu, 1963
Ceratopeltis Poulsen, 1937
Ceratopleurina Coryell & Johnson, 1939
Ceratoproetus Luo & Jiang, 1985
Ceratopygidae Linnarsson, 1869
Ceraurinium Pribyl & Vanek, 1985
Cerauromeros Pribyl & Vanek, 1985
Cerauropeltis Pribyl & Vanek, 1985
Cerawemuna Schallreuter, 2000
Cercopodia Sars, 1914
Cerectella Schallreuter, 2001
Cermataspis Öpik, 1967
Cermatops Shergold, 1980
Ceronocare Shergold, 1975
Cerophas Rafinesque, 1814
Cerophthalmus Rafinesque, 1815
Cetophagus Rafinesque, 1815
Chacharejocaris Tchernyshev, 1945
Chacomurus Branisa & Vanek, 1973
Chaenocaris Jones & Woodward, 1898
Chaetomeskelus Verhoeff, 1939
Chagosia Walker, 1909
Chakassinella
Chakasskia Poletayeva, 1936
Chakasskinella Repina, 1964
Chalfontia Shergold, 1982
Chaliconiscus Verhoeff, 1929
Chamavia Schallreuter, 2000
Chambersiellus Lamont, 1975
Chanciaopsis Sundbe, 1994
Chandrinouyina
Changaspis Lee, 1963
Changchowilla Waisfeld, Vaccari, Chatterton & Edgecombe, 2001
Changia Sun, 1925
Changqingia Lu & Zhu, 1983
Changshaniidae
Changshanocephalus Sun, 1935
Changyangia Chang, 1965
Charaulaspis Lazarenko, 1962
Charaxia Desmarest, 1825
Charineus Desmarest, 1823
Charybdaspis Basse, 1998
Chashania Lu & Sun, 1977
Chasmataspidae
Chatiania Yang, 1978
Chatkalagnostus Khairullina & Abdullaev, 1970
Chatkalgnostus
Chattertonella Salas, 2003
Chattiaspis Struve, 1958
Chauffouraspis Pillet, 1973
Chaunoproetoides Yuan, 1988
Chaunoproetus Richter, 1919
Chavesia Dollfus, 1889
Cheilocephalidae
Cheirurella Apollonov, 1970
Cheiruridae Salter, 1864
Cheiruroideidae
Cheiruroididae
Chekiangaspis Lu, 1962
Chelietha Chamberlin, 1946
Chelonobia Leach, 1825
Chenaspis Zhou & Xiang, 1993
Chencunia
Chengcunia Qiu, 1984
Chenghuiidae
Chengjiangaspis Zhang & Lin, 1980
Chengjiangocaris Hou & Bergstrom, 1991
Chengkouaspidae
Chengkouella Lu & Chang, 1974
Chengkouia Lu, Chang et al., 1974
Chengkouiidae
Chengshanaspis Chang, 1963
Chenjiangaspis
Cherrycreekia Adrain & Westrop, 2004
Chiarumanipyge Branisa & Vanek, 1973
Chiawangella Chu, 1959
Chichikaspis Balashova, 1966
Chienaspis Suvorova, 1964
Chiides Hahn & Hahn, 2002
Chilenarea Bücherl, 1942
Chilenaria Verhoeff, 1934
Chilobolina Ulrich & Bassler, 1923
Chilopoda
Chilopus Matthew, 1895
Chimaerastella Gandl, 1972
Chinghizella Borukaev & Ivshin, 1952
Chinobius Verhoeff, 1934
Chiops Hahn & Hahn, 2002
Chiozoon Lane, 1972
Chirocephalellus Daday, 1910
Chirurgon Gistl, 1848
Chishanheella Zhang, 1995
Chitobalanus Gregorio, 1930
Chittidilla King, 1941
Chlamydocytheridea Purper, 1979
Chlupacaris Van Roy, 2006
Chlupaciparia Feist, 2003
Chlustinia Pribyl & Vanek, 1965
Chondagraulos
Chondragraulaspis Koptev, 1969
Chondragraulina Pokrovskaya, 1960
Chondragraulos Lermontova, 1940
Chondranomocarella Pospelov & Fedyanina, 1958
Chondrastaulina
Chondrinouvina
Chondrinouyina Repina, 1965
Chondroparia Lorenz, 1906
Choneilobarges Phleger, 1936
Chonionotus Jordan, 1854
Chorbusulina Lazarenko, 1962
Chorionotus Meyer, 1853
Chosenia Kobayashi, 1934
Chraspedops Raasch, 1939
Chromatanops Verhoeff, 1906
Chropus Spence Bate, 1888
Chrysocoma Haan
Chuangianoproetus Wu, 1977
Chuangiella Kobayashi, 1935
Chuangiformis
Chuangina Kobayashi, 1967
Chuangioides Chu, 1959
Chuangiopsis Sivov, 1955
Chuangites Howell, 1945
Chuanqianoproetus
Chuchiaspis Chang, 1974
Chugaevia Pribyl & Vanek, 1972
Chulanolenus Zhang, 1983
Chungkingaspis Lu, 1959
Chunkingaspis
Churkinia Palmer, 1968
Cilia Peng, 1992
Cilicoea Leach, 1818
Ciliocephalus Liu, 1977
Ciliscutellum Lin, 1987
Cilonera White, 1843
Cinaras Sowerby, 1823
Cindarella Chen, Ramsköld, Edgecombe & Zhou, 1996
Cineras Leach, 1817
Cinnella Romanenko, 1978
Circulocrania Fortey & Owens, 1987
Cirravus Tchernyshev, 1935
Cirripodites Matthew, 1896
Cirropodites Matthew, 1896
Clariondia Hupé, 1953
Clarkeaspis Lieberman, 1993
Clausocaris Polz, 1989
Clavagnostidae Howell, 1937
Clavatellus Poletaeva, 1955
Clavibole Hahn, Hahn & Brauckmann, 1982
Clavigellus Geyer, 1994
Cleistomes Haan
Clemenella Khairullina, 1975
Clevelandella Resser, 1938
Climachtichnites Miller, 1877
Clinocosta Guernet & Bellier, 2000
Clitia Sowerby, 1831
Clustinia
Clypecaris Hou, 1999
Clypoproetus Begg, 1939
Clyptra Leach, 1825
Cnizus Billberg, 1820
Cobboldia Lermontova, 1940
Cobboldus Raw, 1936
Cochilogonus Verhoeff, 1943
Cochliorrhoe Whittard, 1966
Coelaspis Deiss, 1939
Coelino Latreille, 1828
Coelonellina Polenova, 1952
Coenaspoides Poletaeva, 1977
Coephalocoeliaspis Sivov, 1960
Coignops Gandl, 1980
Coignouina Reed, 1943
Colchiobrachyiulus Lohmander, 1936
Coleiidae
Collembola
Colliceps Repina, 1974
Collis Koroleva, 1959
Colobinion Whittington, 1961
Colossaspis Zhang, 1983
Colpocoryphoides Harrington & Leanza, 1957
Colpos Moberg, 1895
Coltraneia Lieberman & Kloc, 1997
Columbicephalus Kobayashi, 1955
Colymbus Hadding, 1913
Comptonaspis Brezinski, 1988
Comptusiella Melnikova, 1997
Conagraulos Howell, 1937
Concavicaris Rolfe, 1961
Conchoedromia Chopra, 1934
Conchoides Hessland, 1949
Conchotrya Gray, 1825
Condylopygidae
Conephilus Sars
Congestheriella Kobayashi, 1954
Congloboniscus Jackson, 1938
Conimetopus Hahn & Hahn, 1985
Coniopleura Vogdes, 1925
Conocephalites Barrande, 1852
Conocephalus Zenker, 1833
Conococheaguea Rasetti, 1959
Conococheaquea
Conocoryphidae
Conoides Howell, 1937
Conokephalinidae
Conokephaluella Hupé, 1960
Conomicmacca Hupé, 1953
Conoparia Hawle & Corda, 1847
Conophillipsia Roberts, 1963
Conophrys Callaway, 1874
Conopolus Robison, 1988
Conoredlichia Chang, 1966
Constrictella Wolfart, 1974
Contracheirurus Chatterton & Perry, 1984
Convexicaris Schram, 1990
Coombewoodia Archinal & Brauckmann, 1989
Coosellidae
Coosinoides Ivshin, 1962
Copechaeta Carus, 1880
Copechaete Hesse, 1878
Coplacoparia Hammann, 1971
Corbina
Corbinia Walcott, 1924
Corcoraniidae
Corculus Gistl, 1847
Cordapeltis Pribyl & Vanek, 1971
Coreanocephalus Kobayashi, 1935
Coreocaris Kobayashi, 1937
Coreolenus Hupé, 1953
Cornia Lutkevich, 1941
Cornovica Whittard, 1960
Cornucoryphe Sdzuy & Linan, 1996
Cornulina Coryell & Williamson, 1936
Corobalanus Gregorio, 1930
Coronaspis Wu, 1990
Coronatella Dybowski & Grochowski, 1894
Coronocephalina Wu, 1979
Coronuligenus Renier, 1804
Corsica Agassiz, 1843
Coryella Harris & Lalicker, 1934
Corynexochella Suvorova, 1964
Corynexochidae
Corynexochides Rasetti, 1948
Costabuntonia Khosla, 1999
Costacoplumidae
Costadiscus Babcock, 1994
Costapyge Howell, 1937
Costonia Whittard, 1956
Costracheirurus
Cotaglagnostus
Cotalognostus Whitehouse, 1936
Courtessolium Pribyl & Vanek, 1985
Cowiedesmus Wilson & Anderson, 2004
Coxopleurotostigmus Bücherl, 1939
Craigheadia Hupé, 1955
Craspedoprion Verhoeff, 1936
Crassibole Gandl, 1980
Crassifimbria Lochman, 1947
Cratoraricrus Wilson, 2003
Cratylus Meyer, 1866
Cremastoglottos Whittard, 1961
Cremastoglottus
Crepicephalidae
Crepidocercus Birge, 1879
Cretaspis Joleaud, 1916
Creticarcinus Withers, 1928
Cretoperipatus Engel & Grimaldi, 2002
Crinoidoxenos Blake, 1933
Criotypus Öpik, 1979
Cristagnostus Rushton, 1978
Cristiopsis Schallreuter, 1995
Crithias Hawle & Corda, 1847
Croixana Nelson, 1951
Crossoura Moberg & Segerberg, 1906
Crotalocephalides Alberti, 1967
Crotalurus Volborth, 1858
Crozonaspis Henry, 1968
Crucicephalus Shergold, 1971
Crusoia
Crusoiina Poletaeva, 1972
Crusola Walcott, 1924
Crussolum Shear, 1998
Cryphina Oehlert, 1889
Cryptocaridae
Cryptochir Dana, 1852
Cryptocyprus Coryell & Williamson, 1936
Cryptoderaspis Rasetti, 1946
Cryptolithoides Whittington, 1941
Cryptonymus Eichwald, 1825
Cryptozoe Packard, 1886
Ctenaenigma Novozhilov, 1955
Ctenentoma Schmidt, 1941
Ctenodillidium Frankenberger, 1940
Ctenoscutellum Vanek, Pek & Kupkova, 1990
Cuchulain Lamont, 1978
Culampaia Rusconi, 1949
Culmenaspis Repina, 1972
Cultrops Struve, 1996
Cuneobeyrichia Schallreuter & Schafer, 1995
Curculioididae
Curiaspis Sdzuy, 1955
Curriella Lamont, 1978
Curuyella Eldredge & Branisa, 1979
Curvoryctocephalus Zhao & Yuan, 2001
Cuvieriana Gray, 1825
Cuyanaspis Rusconi, 1953
Cuyanella Salas, 2002
Cyamocypris Anderson, 1939
Cyanogus Billberg, 1820
Cyathocephalus Luo & Hu, 1999
Cybantyx Lane & Thomas, 1978
Cybelina Reed, 1928
Cybellela Reed, 1928
Cybistes White, 1847
Cychreus Rafinesque, 1814
Cyclagnostus Lermontova, 1940
Cyclestherioides Raymond, 1946
Cyclocarcinus Guérin-Ménéville, 1838
Cyclognathopsis Borukaev, 1955
Cyclograpta Novozhilov, 1954
Cyclograptina Novozhilov, 1954
Cycloleaia Novozhilov, 1952
Cyclolenzellina
Cyclolorenzellina Ergaliev, 1980
Cyclopina Raasch, 1939
Cyclopygidae
Cyclorya Attems, 1947
Cydonocephalus Whittington, 1963
Cylindraspis Sandberger, 1849
Cylindrillioides Nicholls, 1938
Cylindrocephalus Trenkner, 1868
Cylindrus Neviani, 1928
Cylindusia Rafinesque, 1815
Cyllenula Czerniavsky, 1878
Cyllias Bovallius, 1887
Cylloma Budde-Lund, 1885
Cymodice Leach, 1816
Cyphambon Shaw, 1962
Cyphinioides Reed, 1942
Cyphinium Weber, 1933
Cypholichas Phleger, 1935
Cyphoniscus Salter, 1853
Cyphonychius Verhoeff, 1928
Cyphopauropus Cook, 1896
Cypridinopsis Jones, Kirkby & Brady, 1874
Cyprilepadidae
Cyprinotoides Masi, 1928
Cyranolichas Phleger, 1936
Cyrtoctenidae
Cyrtodechenella Richter & Richter, 1950
Cyrtoprora Öpik, 1967
Cyrtosymboloides Alberti, 1967
Cytherites Sars, 1926
Dactylocerus Desmarest, 1823
Dactylops Fleming, 1823
Dactylura Brady, 1897
Dagoerayella Meidla, 1996
Daguinaspidae
Dahungshania
Daihuaia Yuan, 1988
Dainellicauda Kobayashi, 1960
Dakoticancrinidae
Dalarnepeltis Pribyl & Vanek, 1978
Dalaspis Chatterton & Perry, 1983
Daldynia Egorova, 1968
Dalejeproetus Snajdr, 1977
Dalmaniopsis Geinitz, 1862
Dalmanitidae Vogdes, 1890
Dalmanitoides Delo, 1935
Dalmatodyea Verhoeff, 1938
Damaiaoaspis
Damesellidae
Damesops Chu, 1959
Dameus Rafinesque, 1814
Damiaoaspis Qiu, 1983
Danangouia Chen, 1985
Dananzhuangaspis Lin, 1983
Dananzhuangia Qiu, 1980
Danarcus Ludvigsen & Tuffne, 1994
Daniella Kovalevskii, 1974
Danzhaiaspis Yuan & Zhou, 1980
Danzhaina Yuan, 1980
Danzhaisaukia Lu & Chien, 1978
Daopingia Lee, 1978
Daphnella Baird, 1850
Daphnoidea Agassiz, 1846
Daphnoidia Hibbert, 1835
Daracia Gray, 1825
Dartonaspis Miller, 1936
Dasyleptus Brongniart, 1885
Dasyptyx Chamberlin, 1920
Datongites Chu, 1960
Datsonia Shergold, 1975
Dayinaspis Yuan & Xiang, 1998
Dayongia Xiang Liwen & Ji Zailiang, 1986
Deacalymene Whittington, 1965
Deanokephalus Pillet, 1992
Debonia Schallreuter, Kanygin & Hinz-Schallreuter, 1999
Dechenelloides Gandl, 1968
Dechenellurus Maksimova, 1960
Declivoharpes Pribyl & Vanek, 1981
Declivolithus Pribyl & Vanek, 1967
Decoranewsomites Casier & Lethiers, 1997
Decordinaspis Harper & Romano, 1967
Decoroscutellum Snajdr, 1958
Decus Pegel, 1981
Deinoproetus Zhou, Siveter & Owens, 2000
Deisella Howell & Duncan, 1939
Deissia Sun, 1937
Dekalymene Curtis & Lane, 1998
Dekanonyx Verhoeff, 1937
Delagnostus Öpik, 1961
Delgadodiscus Kobayashi, 1935
Delgadoia Vogdes, 1917
Delinghaspis Lin & Zhang, 1979
Delleana Ivshin, 1962
Delmarella Chappuis, 1954
Delocare Struve, 1958
Deloites Destombes, 1972
Deloops Lieberman & Kloc, 1997
Delops Rickards, 1965
Delphasaphus Ivantsov, 2000
Deltacare Harrington & Leanza, 1957
Deltacephalaspis Eldredge & Branisa, 1979
Deltadechenella Ormiston, 1967
Deltadiscus Kobayashi, 1943
Deltina Sundbe, 1994
Deltocephalus Ogienko, 1969
Deltophthalmus Resser, 1938
Demeterops Pribyl & Vanek, 1985
Denagnostus Jago, 1987
Denaspis Repina, 1973
Denckmannia Wedekind, 1912
Denella Ludvigsen & Chatterton, 1982
Denisonella Cioneis & Bristol, 1942
Denisonia Croneis & Bristol, 1939
Dentaloscutellum Chatterton, 1971
Derehavinella Birstein, 1938
Dereimsia Kozlowski, 1923
Dermophilus van Beneden & Bessels, 1870
Desertellio Verhoeff, 1930
Desmacanthus Meek & Worthen, 1868
Desmetia Walcott, 1925
Desmophilus Huxley, 1877
Desmus Raw, 1908
Destombesina Morzadec, 1997
Destombesites Snajdr, 1987
Deucalion Stschegloff, 1827
Deuterolichas Reed, 1902
Devonacaridae
Devonobiidae
Devonocoryphe
Devonodontochile Snajdr, 1985
Devonoproetus Lütke, 1990
Devonosulcuna Becker, 2004
Diabole Groning, 1985
Diadema Schumacher, 1817
Diademaproetus Alberti, 1964
Dianchia Luo & Hu, 1997
Diandongaspidella Yuan, 1997
Diandongaspis Lu & Zhang, 1980
Diaoyaspis Yin, 1978
Diaphanocypris Wuerdig & Pinto, 1990
Diaphanometopidae
Diaulacidae
Diaxylus Attems, 1939
Dicellocephalus Angelin, 1854
Diceratocephalidae Joffe, Cannon & Schockaert, 1998
Diceratocephalina Maksimova, 1962
Diceratocephalus Lu, 1954
Dicerocaris Robison & Richards, 1981
Dichagnostus Jaekel, 1909
Dichelepyge Harrington & Leanza, 1952
Dicladosomus Verhoeff, 1924
Dicranactis Hawle & Corda, 1847
Dicranocaris Briggs, Lieberman, Hendricks, Halgedahl & Jarrard, 2008
Dictyella Kobayashi, 1933
Dictyocephalites Bergeron, 1895
Didwudina Ivshin, 1962
Diemanosaukia Jago & Corbett, 1990
Dienstina Richter, 1931
Dignaceps Khairullina, 1975
Dignagnostus Khairullina, 1975
Digonus Gürich, 1909
Digrypos Kobayashi, 1940
Dihogmochilus Teichert, 1937
Dikella Rosova, 1985
Dikellocephalus
Dikelocephalidae
Dikelocephaliidae
Dikelocephalinidae
Dikelocephalites Sun, 1935
Dikelocephalopsis Poletaeva, 1955
Dikelokephalinidae
Dikelus Rosova, 1985
Dilataspis Fedjanina, 1999
Dilepas Gervais, 1847
Dimastocephalus Stubblefield, 1950
Dimeropyge Öpik, 1937
Dimeropygidae
Dimorphichnus Seilacher, 1955
Dinao Desmarest, 1823
Dindymene Hawle & Corda, 1847
Dindymenella Lu, 1976
Dinesidae
Dingxiangaspis Zhang, 1983
Dinoa Rafinesque, 1814
Dinura Nordmann, 1832
Dionideina Snajdr, 1981
Dionidella Prantl & Pribyl, 1950
Dionidepyga Snajdr, 1981
Dionididae
Diopsites Rafinesque, 1832
Dioxycaris Gürich, 1929
Dipentaspis Öpik, 1967
Dipharangus Holloway, 1980
Dipharus Clark, 1923
Diphyicola Costa, 1862
Diplagnostidae Whitehouse, 1936
Diplapatokephalus Raymond, 1937
Dipleuropyge Lermontova, 1951
Diploaspididae
Diplolichas Phleger, 1936
Diplomillotellina Scheller, 1977
Diplopoda
Diplopodia Vialov, 1929
Diplopsites Rafinesque, 1832
Diplopyge Luo & Hu, 1999
Diplorrhina Hawle & Corda, 1847
Diplosphaerillo Arcangeli, 1934
Diplostylus Salter, 1863
Diplozyga Raymond, 1937
Dipostylus Dawson, 1878
Dipterocaris Clarke, 1883
Dipterosacus Kampen & Boschma, 1925
Dipyrgotes Öpik, 1967
Dipyrogotes
Dirhynchus Nordmann, 1832
Discagnostus Öpik, 1963
Discoleaia Kobayashi, 1954
Discomesites Öpik, 1976
Dislobosaspis Yin, Tripp, Zhou, Zhou & Yuan, 2000
Disphaerobius Attems
Distagnostus Shergold, 1971
Distyrax Lane, 1988
Dithidae
Dithyrocarus Griffith, 1842
Dittozus Attems, 1939
Dividuagnostus
Dixiphopyge Brezinski, 1988
Dnestrovites Balashova, 1968
Dohmiella Lütke, 1990
Dokimocephalidae
Dolerasaphus Harrington & Leanza, 1957
Dolerolenidae
Dolerolichia Sdzuy, 1962
Dolgeuloma Rozova, 1963
Dolichagnostus Pokrovskaya, 1958
Dolichoagnostus
Dolicholaeia Novozhilov, 1952
Dolichometopidae Walcott, 1916
Dolichopteridae
Dolicodon Fanzago, 1874
Dollocaris Van Straelen, 1924
Domina Gorovtsova, 1977
Donaldsoncythere Rioja, 1942
Donbrachyiulus Lohmander, 1936
Donggouia Lin & Zhang, 1979
Dongshania Lin, 1983
Dongshanocaris
Donovania Leach, 1814
Dorbanella Chevreux, 1914
Dorcadogonus Jeekel, 1999
Dorcheatia Swain, 1993
Doremataopsis
Doremataspis Öpik, 1967
Doricranos Hoare & Mapes, 2000
Dorypygaspis Khairullina, 1973
Dorypygella Walcott, 1905
Dorypygidae Kobayashi, 1935
Douposiella Lu, Chang, Chien, Chu et al., 1974
Dracochelidae
Drepanomacrothrix Brehm, 1936
Drepanopteridae
Drepanopyge Lu, 1961
Drepanosorus Simon, 1886
Drepanuroides Chang, 1966
Drevermannia Schmidt, 1909
Dreyfussina Hupé, 1956
Drieschia Brehm, 1923
Dromiella Czerniavsky, 1878
Dromiidarum Beurlen, 1928
Dronoviella Melnikova, 1999
Drotops
Drummuckaspis Prantl & Pribyl, 1949
Dryalus Barrande, 1872
Dubhglasina
Dubhglassina Lamont, 1948
Dubosquiellina Brolemann, 1926
Dudu Hahn & Hahn, 1985
Dufresnoyiproetus Pillet, 1969
Duibianaspis Lu & Lin, 1984
Dunderbergella Howell, 1945
Dunopyge Struve, 1998
Duodingia Chow, 1974
Duotingia
Duplocona Schlüter, 1838
Durinia Robison, 1988
Dushania Yin, 1978
Duyunaspis Chien & Lin, 1978
Duyunia Chien, 1961
Dybowskia Garjajeff, 1901
Ebenezeria Marcou, 1888
Eccoptochiloides Prantl & Pribyl, 1948
Echinestheria Marliere, 1950
Echinocarididae
Echinocheres Claus, 1889
Echinophacops
Echinopyge Haas, 1968
Echlnophacops Zhou, 1983
Ecnomocaris Conway Morris & Robison, 1988
Ectenaspis Raymond, 1920
Ectodemites Cooper, 1941
Ectoptyx Chamberlin, 1920
Edelsteinaspidae
Edelsteinaspididae
Edganocare
Edgellia Shaw, 1950
Editella Olempska, 1998
Edithiella Kurtz, 1975
Edmundsonia Cooper, 1953
Effnaspis Dean, 1972
Effops Hahn & Hahn, 2002
Egidia Costa, 1853
Egle Barrande, 1846
Eidothea Scouler, 1831
Eiffelaspis Chang, 1963
Eikocalanus Boeck, 1867
Eileticus Scudder, 1882
Eilidh Lamont, 1975
Eilura Resser & Endo, 1935
Eirelithus Lamont, 1941
Ejinaspis Lu, Zhou & Zhou, 1986
Ejinoproetus Zhou, Siveter & Owens, 2000
Ekeraspis Tjernvik, 1956
Ekwanoscutellum Pribyl & Vanek, 1972
Elamis White, 1847
Elandaspis Egorova, 1958
Elankaspis Egorova, 1976
Elaphophyllum Verhoeff, 1921
Elaphraella Lu & Qian, 1983
Elasmaspis Kramarenko, 1956
Elatelimbus Repina, 1960
Elatius Orlowski, 1985
Elbaspis Baldis & Blasco, 1973
Eldredgeops
Electina Melnikova, 2000
Electrophyrinidae
Eleganolimba Pokrovskaya, 1959
Elegantaspis Ivshin, 1962
Elegestina Pokrovskaya, 1959
Eleutheroiulus Verhoeff, 1894
Elganellus Suvorova, 1958
Elicicola Jell, 1990
Elikogonus Verhoeff, 1938
Elimaproetus Curtis & Lane, 1997
Elkanaspis Ludvigsen, 1982
Elkia Walcott, 1924
Elleriidae
Ellesides Lamont, 1975
Ellesmeria Tolmachoff, 1926
Ellipsocaris Woodward, 1882
Ellipsocephalidae
Ellipsocephaloididae
Ellipsocoryphe Lu, 1975
Ellipsostrenua Kautsky, 1945
Ellipsotaphrus Whittard, 1952
Ellipsuella Hupé, 1960
Elliptocephala
Elliptocephalus Emmons, 1844
Ellotia Gatehouse, 1968
Ellsaspis Rasetti, 1945
Elmanaspis Ivshin, 1957
Elongatanileus Ji, 1986
Elsarella Edgecombe & Ramskold, 1996
Elviniidae
Elvinoides Ivshin, 1983
Elviraspis Ivshin, 1983
Elyaspis Kurtz, 1975
Emanuelaspis Laurie, 1996
Emanuelina Laurie, 1996
Embolimus Rominger, 1887
Emeidiscus Li, 1980
Emeraldella Walcott, 1912
Emeraldoides Simonetta, 1964
Emmelezoe Jones, 1886
Emmelozoe Jones & Woodward, 1899
Emmrichellidae
Emmrichops Marek, 1961
Emphylia Koelbel, 1879
Emsurella Rozova, 1960
Emucarididae
Emuellidae Popcock, 1970
Enammocephalus Repina, 1964
Enantiaspis Rasetti, 1972
Enarthrus Desmarest, 1823
Encrinurella Reed, 1915
Encrinuridae Angelin, 1854
Endoaspis Lochman, 1956
Endocrania Kobayashi, 1956
Endogramma Hawle & Corda, 1847
Endymioniidae
Eniseja Poletaeva, 1959
Ennarthrus Rafinesque, 1814
Enneacnemis Hawle & Corda, 1847
Ennurensis Collinge, 1915
Enodiproetus Pribyl, 1970
Enone Risso, 1826
Enontioura Resser, 1942
Ensecoryphe Basse, 1997
Enshia Chu, 1974
Enthothalassinum Attems, 1914
Entmema Hoare, Svitko & Sturgeon, 1999
Entoarchis Kobayashi, 1955
Entognatha
Entomaspididae
Entomastracites Lovén, 1845
Entomidella Jones, 1873
Entomolithus Gesner, 1758
Entomon Latreille, 1796
Entomostracites Wahlenberg, 1821
Entomum Agassiz, 1846
Entorachis Kobayashi, 1955
Entsyna Rozova, 1968
Eoagnostus Resser & Howell, 1938
Eoanomocarella Zhang & Wang, 1985
Eoapatokephalus Rozova, 1983
Eoarmadillidium Dollfus, 1904
Eoarthropleuridae
Eoasaphiscellus Jell, 2003
Eoasaphiscus Lu & Yuan, 1978
Eoasaphiscus Khairullina, 1973
Eoasaphus Kobayashi, 1936
Eobalanus Ruedemann, 1924
Eobeyrichia Henningsmoen, 1954
Eocarcinidae
Eocarididae
Eocatuniella Egorova, 1969
Eoceraurus Esker, 1964
Eochatiania Yuan & Yin, 1998
Eocheirurus Rozova, 1960
Eocheiurus
Eochuangia Kobayashi, 1935
Eocorycephalus Reed, 1925
Eocorynexochus Korobeinikova, 1965
Eocryphops Richter, 1931
Eoctenopyge Henningsmoen, 1957
Eocurvoryctocephalus Zhao, Yuan, McCollum, Sundberg, Yang, Guo, Zhu & Yang, 2001
Eocyrtosymbole Pillet, 1973
Eodaguinaspis Hupé, 1953
Eodalmanitina Henry, 1965
Eodindymene Kielan, 1960
Eodiscidae Raymond, 1913
Eodontopleura Qian & Lin, 1980
Eodrevermannia Pribyl, 1946
Eogeophilus Schweigert & Dietl, 1997
Eohomalonotus Reed, 1918
Eoisotelus Wang, 1938
Eoiulus Bergroth, 1905
Eojulus Kusta, 1886
Eokaninia Poletaeva, 1967
Eokaolishania Wittke, 1984
Eokaotaia Yuan & Zhao, 1994
Eokosovopeltis Pribyl & Vanek, 1972
Eoleaia Kobayashi, 1954
Eoleonaspis Sheng, 1974
Eolimulidae
Eolotagnostus Zhou, 1982
Eomalungia Lee, 1978
Eomansuyia Zhang & Wang, 1985
Eometopus Hahn & Hahn, 1996
Eomicrophillipsia Yuan, 1996
Eomonarachus
Eomonorachus Delo, 1935
Eopagetia Kobayashi, 1943
Eopagurus Beurlen, 1925
Eopalpebralia Alberti, 1981
Eoparadoxides Solov'ev, 1969
Eopauropus Scheller & Wunderlich, 2001
Eopharostoma Nan, 1985
Eophyrinidae
Eopiriproetus Alberti, 1966
Eoproeteus Zhang Jinlin & Wang Shaoxin, 1984
Eoproetus
Eopterum Rodendorf, 1961
Eoptychaspis Nelson, 1951
Eoryctocephalops Zhao, Yuan, McCollum, Sundberg, Yang, Guo, Zhu & Yang, 2001
Eoryctocephalus Yuan & Zhao, 2001
Eosaukia Lu, 1954
Eoscutellum
Eoshumardia Hupé, 1955
Eosoproetus Zhou, Siveter & Owens, 2000
Eosoptychoparia Chang, 1963
Eosoptychopyge Zhang, 1981
Eospencia Chernysheva, 1961
Eosynurella Martynov, 1932
Eotaitzuia Zhang & Yuan, 1980
Eotrinucleus Zhou Zhiyi & Zhang Jinlin, 1978
Eotrogulidae
Eowhuhia
Eowinterbergia Yuan & Xiang, 1998
Eowuhuia Zhang Jinlin & Wang Shaoxin, 1984
Eozacanthoides Qiu, 1980
Ephalmatoridae
Epidaguinaspis Hupé, 1953
Epimeriopsis Barnard, 1931
Epumeria Rusconi, 1958
Eratea Rafinesque, 1815
Erbenaspis Vanek, 1961
Erbenia Wittke, 1984
Erbenicoryphe
Erbenieoryphe Feist, 1989
Erbiaspis
Erbiella Fedyanina, 1962
Erbina Pokrovskaya, 1959
Erbiopsidella Pokrovskaya, 1959
Erbocephalus Sivov, 1958
Erdelia Lomovitskaya, 1960
Erdoradites Ivshin, 1962
Erediaspis Öpik, 1967
Eremita Meuschen, 1778
Eremitius Rafinesque, 1815
Eremops Bollman, 1893
Erieopteridae
Erinnys Salter, 1865
Eriopsis Wrzesniowski, 1890
Erixanium Öpik, 1963
Erkelina Lazarenko, 1962
Ermanella Maksimova, 1955
Erratacytheridea Herrig, 1997
Erratobalticus Buchholz, 1997
Eryonasticus Bate, 1888
Erythrocephalus Tilesius, 1818
Erzishania Zhu & Qian, 1980
Escasona Matthew, 1902
Eshelmania
Eskaspis Clarkson, Eldredge & Henry, 1977
Esseigania Kobayashi, 1944
Essoidiidae
Estheriellites Bock, 1953
Esthiomenus Gistl, 1847
Estoniosylthere Meidla, 1996
Eteraspis Resser, 1935
Eteroranina Fabiani, 1910
Ethenia Chamberlin, 1952
Ethionome Rafinesque, 1815
Ethmoiulus Verhoeff, 1943
Ethmophorus Pocock, 1891
Etyaea Desmarest, 1823
Euacartia Steuer, 1915
Euagnostus Whitehouse, 1936
Euarges Gürich, 1901
Euarthricocephalus Ju, 1983
Eubalanus Brock, 1922
Eubothropolys Verhoeff, 1907
Eubournellum Attems, 1908
Eubranchinella Daday, 1910
Eucalymene Lu, 1975
Eucolumba Hesse, 1866
Eucrangonyx Stebbing, 1899
Eucythereis Klie, 1950
Eudecaporus Brölemann, 1920
Eudechella
Eudechenella Richter, 1912
Euglomeris Verhoeff, 1906
Eugonocare Whitehouse, 1939
Euheterorhabdus Brodski, 1950
Euisobates Verhoeff, 1908
Eujinnania Qiu, 1983
Eukempfella Becker, 1997
Euleiostegium Zhou Zhiyi & Zhang Jinlin, 1978
Euleptotrichus Verhoeff, 1908
Eulomatidae
Eulomella Kobayashi, 1955
Eulomidae Kobayashi, 1955
Eulomina Ruzicka, 1931
Eulynceus Daday de Dées, 1927
Eumonopia Claus, 1891
Eumorphia Meyer, 1847
Euonchonotina Lu, Zhou & Zhou, 1986
Eupachymerium Attems, 1909
Eupathistoma Brady, 1898
Eupathistonia Brady, 1898
Eupeyerimoffia Brölemann, 1913
Euphoberiidae
Euplethagnostus Lermontova, 1940
Eupontellina Claus, 1893
Euporcellio Verhoeff, 1907
Euporodontus Verhoeff, 1942
Euproetus Richter, 1913
Euproopidae
Euprotoscalpellum Joleaud, 1914
Euptychaspis Ulrich, 1931
Eurekiidae
Europosphaera Verhoeff, 1944
Eurosphaera Verhoeff, 1942
Eurostina Whitehouse, 1939
Eurymetopus Postlethwaite, 1886
Eusition Gistl, 1847
Eusphanella Swartz & Swain, 1942
Eustephanus Swartz & Swain, 1941
Euthycarcinidae
Euthycarcinus Handlirsch, 1914
Eutrimerocephalus Gortani, 1907
Euxinoiulus Lohmander, 1936
Evagena Hahn & Brauckmann, 1989
Evansaspis Kobayashi, 1955
Evenkaspis Kramarenko, 1952
Everne Rafinesque, 1814
Evropeites Balashova, 1966
Ewacaste Ramsköld & Edgecombe, 1993
Exapinurus Nieszkowski, 1859
Exastipyx Holloway, 1996
Exigua Howell, 1937
Extrania Qian, 1983
Ezembius Chamberlin, 1923
Ezhimia Pokrovskaya, 1967
Ezhuangia Qiu & Liu, 1983
Fabriella Melnikova, 2000
Fabulaspis Ivshin, 1952
Faciura Rozova, 1963
Facticavellina Wang & Cao, 1997
Faenicephalus
Failleana Chatterton & Ludvigsen, 1976
Fakoniscus Paulian de Félice, 1940
Falanapis
Falanaspis Tjernvik, 1956
Falcatoproetus Lütke, 1990
Falidoria Hinz-Schallreuter, 2000
Fallagnostus Howell, 1935
Fallotaspidella Repina, 1961
Fallotaspididae Hupé, 1953
Fallotaspodella
Fallotia Hupé, 1952
Falsirostria Novozhilov, 1954
Famatinolithus Harrington & Leanza, 1957
Fandianaspis Lee, 1978
Farsia Wolfart, 1974
Fastigaspis Poulsen, 1964
Fatocephalus Duan & An, 1982
Feilongshania Qian & Lin, 1980
Feistia Edgecombe & Fortey, 2000
Fenestraspis Branisa & Vanek, 1973
Fengdouia Chu, 1974
Fengshania Sun, 1935
Fengtienia Endo, 1937
Fenniops Fortey & Owens, 1987
Ferenepea Öpik, 1967
Ferralsia Cobbold, 1935
Feruminops Haas, 1968
Fialoides Hadding, 1913
Fimbria Neviani, 1930
Fimbriella Stout, 1913
Finecrestia Nan & Chang, 1982
Fissanomocarella Peng, Lin & Chen, 1995
Fissebonia Schallreuter, Kanygin & Hinz-Schallreuter, 1999
Fitzroyaspis Legg, 1976
Flabellocephalus Zhang Jinlin & Wang Shaoxin, 1984
Flexidechenella Zhou, Siveter & Owens, 2000
Flexiscutellum Snajdr, 1960
Fluvicola De Kay, 1844
Folidiscus Aguilar-Alvarez, 1979
Folliceps Öpik, 1970
Forbesia M'Coy, 1846
Forchhammeria Lermontova & Chernysheva, 1950
Forfexicaris Hou, 1999
Forillonaria Lesperance, 1975
Formagnostus
Formonia Richter, 1928
Formosagnostus Ergaliev, 1980
Formosocephalus Verhoeff, 1937
Foulonia Pribyl & Vanek, 1985
Fovaechmina Schallreuter, 1995
Frammia Holtedahl, 1922
Francenaspis Alberti, 1969
Franconicabole Alberti, 1976
Francovichia Branisa, 1960
Fremontia Raw, 1936
Frencrinuroides Lesperance & Desbiens, 1995
Frenerinuroides
Frenguellicythere Bertels-Psotka & Martinez, 1999
Frigillus Gistl, 1847
Fritchaspis Vanek, 1963
Frithjofia Pribyl & Vanek, 1978
Fritzolenellus Lieberman, 1998
Frognaspis Nikolaisen, 1965
Fulmenocursor Wilson, 2001
Fuminaspis Zhang & Lin, 1980
Fuquania Zhao, 1981
Furacopyge Arbizu, 1978
Furcalithus Fortey & Owens, 1987
Furcilia Dana, 1850
Fuscinipyge Ormiston, 1972
Fusichila Chamberlin, 1953
Fuxianhuia Hou, 1987
Fuyunia Hsiang & Zhang, 1981
Fuzhouwania Zhang & Peng, 1998
Gailitella Sidaraviciene, 1997
Galahetes Öpik, 1975
Galatea Agassiz, 1846
Galathaea Rathke, 1841
Galatheites Balss, 1913
Galbagnostus Whittington, 1965
Galeaspis Ivshin, 1955
Galenocaris Wells, 1944
Galerosaukia Shergold, 1975
Gallagnostoides Kobayashi, 1939
Gamarrholithes Schlotheim, 1832
Gammarisca Bazikalova, 1945
Gamonedaspis Branisa & Vanek, 1973
Gamops Snajdr, 1976
Gampsonychus Burmeister, 1855
Gampsonyx Jordan, 1847
Gangdeeria Zhang & Yuan, 1980
Ganinella Elkin (also as Yolkin), 1968
Gansucephalina Zhou, 1982
Gaoloupingia Yuan & Yin, 1998
Gaoqiaioella
Gaotanaspis Zhang & Li, 1984
Gapeevella Gandl, 1987
Garbiella Lazarenko & Datsenko, 1967
Garbinia Grochowski, 1910
Garciana Schallreuter, 1994
Gasocaris Fritsch, 1901
Gastropolus Whittard, 1966
Gatuna Dodds, 1926
Gatunia Rathbun, 1918
Gedania Budde-Lund, 1913
Gedongaspis Yuan & Zhao, 1997
Geesops Struve, 1972
Geigibole Gandl, 1968
Gelasene Palmer, 1968
Gemallia Desmarest, 1823
Gemelloides Carvalho, Edgecombe & Smith, 2003
Gentilapsis
Gentilaspis Hupé, 1958
Geoligia Dollfus, 1893
Geoplaxis Rafinesque, 1832
Georgiellus Möberg, 1899
Gephyroniscus Verhoeff, 1949
Geracephalina Kobayashi & Hamada, 1977
Geragnostella Kobayashi, 1939
Geragnostidae Howell, 1935
Gerasaphes Clarke, 1894
Gerastes
Geratrinodus Kobayashi & Hamada, 1978
Gerdella Bonaduce, Barra & Aiello, 1996
Gesothrix Chamberlin, 1923
Gibbocephalus Pillet, 1965
Gibbula Schallreuter, 1996
Gibscherella Repina, 1979
Gigantopygidae
Gigmpeltis
Gignopeltis Raymond, 1924
Gigoutella Hupé, 1953
Gillina Coryell & Johnson, 1939
Giordanella Bornemann, 1891
Girardiella Lyle, 1938
Girtyites Coryell & Booth, 1934
Girvanagnostella Kobayashi, 1939
Girvanagnostus Kobayashi, 1939
Girvanopyge Kobayashi, 1960
Gitarra Gandl, 1968
Gitocrangon Richter, 1848
Glaberagnostus Romanenko, 1985
Glaberaspis Adrain & Westrop, 2004
Glabretina Lochman, 1965
Gladiatoria Hupé, 1955
Glaphurella Dean, 1971
Glaphuridae
Glaphurina Ulrich, 1930
Glauconome Krøyer, 1845
Glavaspidella
Globampyx Fortey, 1975
Globosograptus Boucek & Pribyl, 1948
Globotherium Brölemann, 1923
Globulaspis Reed, 1931
Globusiella Hahn, Hahn & Brauckmann, 1992
Glockeria Wedekind, 1911
Glomerites Rafinesque, 1832
Gloria Egorova & Savitsky, 1968
Gloriagloria Jell, 2003
Glossicephalus Howell, 1936
Glossocorphus
Glossocoryphus Deiss, 1939
Glossopsis Hessland, 1949
Glyphanellus Ivshin, 1953
Glyphaspellus Ivshin, 1952
Glypheinarum Beurlen, 1928
Glypheopsis Beurlen, 1928
Glyphopeltis Deiss, 1939
Glyptagnostidae
Glyptagnostotes Lazarenko, 1966
Glyptodynemene Van Straelen, 1944
Glyptometopsis Rasetti, 1961
Glyptometopus Rasetti, 1944
Glyptopleurites Coryell & Johnson, 1939
Glyptoscorpius Peach, 1883
Gnarcon Nardo, 1869
Gnathophansia Willemoes-Suhm, 1873
Gnathophausa Smith, 1884
Gnathoptylus Bate, 1888
Gnatophilum Cocco, 1832
Gog Fortey, 1975
Gogiura Rosova, 1985
Gogoella Legg, 1976
Golasaphus Shergold, 1971
Goldfieldia Palmer, 1964
Goldillaenoides Balashova, 1959
Gomiites Pribyl & Vanek, 1978
Gondwanaspis Feist, 2002
Goniacanthus Hawle & Corda, 1847
Goniator Schallreuter & Hinz-Schallreuter, 2002
Gonicheirurus Nan, 1985
Gonioleaie Novozhilov, 1952
Goniopleura Hawle & Corda, 1847
Gonioteloides Kobayashi, 1955
Gonzaloia Geyer, 1998
Goplana Wrzesniowski, 1879
Gorskia Poletaeva & Fedyanina, 1971
Gortania Cossmann, 1909
Gosiphilus Chamberlin, 1912
Gossea Spence Bate, 1862
Goumenzia Guo & Duan, 1978
Goycoia Rusconi, 1950
Gracemerea Engel & Morris, 1989
Graciella Rozova, 1963
Gracilocoryphe Pribyl & Vanek, 1978
Granadocephalus Carvalho, Edgecombe & Smith, 2003
Grandioculus Cossmann, 1908
Granirostria Novozhilov, 1954
Granitzia Buchholz, 1999
Granularapis
Granularaspis Babcock & St. John, 1995
Granularia Poletaeva, 1951
Granuloagnostus Pek, 1970
Grapsisaccus Giard & Bonnier, 1890
Gratagnostus Khairullina, 1975
Gravensia Schallreuter, 2000
Gravensteinia Schallreuter & Schafer, 1999
Grayia Spence Bate, 1862
Greylockia Raymond, 1937
Grimotaea Leach, 1820
Grimotea Desmarest, 1823
Grinnellaspis Poulsen, 1948
Griphasaphus Öpik, 1967
Groenwallia
Groenwallina
Gronovia Leach, 1814
Gronwallia Kobayashi, 1935
Gronwallina Rozova, 1964
Grossia Alberti, 1960
Grossoproetus Wu, 1987
Gruetia Pillet, 1969
Guancenshania Zhang & Wang, 1986
Guandacolithus Harrington & Leanza, 1957
Guangweicarididae
Guangxiaspis Zhou, 1977
Guangyuanaspis Lu, Chang et al., 1974
Guangyuania Lee, 1978
Guankouia Zhang & Yuan, 1995
Guanzhuangia Guan, 1997
Guaranites Baldis & Hansen, 1980
Guayakinites Baldis & Hansen, 1980
Gudralisium Basse, 1998
Guichenia Henry, 1968
Guilinaspis Yuan & Xiang, 1998
Guizhouanomocare Lee, 1978
Guizhoucephalina Chien, 1961
Guizhoudiscus Zhang, 1978
Guizhouhystricurus Yin, 1978
Guizhoupliomerops Chu & Yin, 1978
Guleaspis Ivshin, 1983
Guluheia Zhang & Wang, 1985
Guohongjunia Zhang, 1999
Guotangia Zhou, 1981
Guraspis Semashko, 1969
Gurida Budde-Lund, 1909
Gurneyella Brehm, 1930
Gushanaspis Zhang & Peng, 1998
Gutschickia Scott, 1944
Gwyneddocaris Bock, 1946
Gymnanolena Ranzani, 1820
Gymnocyzicus Daday, 1914-15
Gymnoderma Budde-Lund, 1908
Gymnolepas Blainville, 1824
Gymnostomix Fortey & Owens, 1987
Gyrometopus Jaanusson, 1975
Haasia Yuan, 1988
Habocythere Khosla, Jakhar & Mohammed, 1997
Habrocephalus Repina, 1964
Hadraspis Wu & Lin, 1980
Hadrocephalites Sundberg & McCollum, 2002
Hadrokraspedon Shaw, 1962
Hadromeros Lane, 1971
Hadrorachus Delo, 1935
Hagiorites Kobayashi, 1951
Haibowania Zhang, 1986
Halcyone Burmeister, 1834
Halimonectes Guérin-Ménéville, 1857
Halimus de Haan, 1839
Haliplanktos Blaker & Peel, 1997
Hallandclarkeops Lieberman & Kloc, 1997
Hallaspis Raasch & Lochman, 1943
Haloarmadillidium Arcangeli, 1930
Hamashania Kobayashi, 1941
Hamiltonella Stewart, 1936
Hamiroproetus Snajdr, 1977
Hammannopyge Pribyl & Vanek, 1985
Hammanopyge
Hammatocnemidae
Hammatocnemis Kielan, 1960
Hamptonella Resser, 1937
Hamtonella Resser, 1937
Hanburia Walcott, 1916
Hanchungolithus Lu, 1956
Hancrania Kobayashi, 1962
Handeliella Brehm, 1924
Hanivella Sivov, 1955
Haniwapyge Rosova, 1985
Haniwoides Kobayashi, 1935
Hanjiangaspis Zhou & Xiang, 1993
Hanshania Zhang & Wang, 1985
Hantellia Schallreuter, 1995
Hanzhongaspis Chen, 1975
Hapalopleuridae Harrington & Leanza, 1957
Haplobeckia Verhoeff, 1941
Haploconus Raymond, 1913
Haplocytharidea Stephenson, 1936
Haplodiaptomus Kiefer, 1935
Haploerchodus Verhoeff, 1940
Haplogonophora Brölemann, 1932
Haploleptodesmus Brölemann, 1910
Haplolithobius Verhoeff, 1927
Hapsidocare Shergold, 1975
Harataspis Egorova & Savitsky, 1969
Hardieopteridae
Hardinia Coryell & Rozanski, 1942
Hardyia Walcott, 1924
Harltonella Bradfield, 1935
Harpesoides Koroleva, 1978
Harpetidae Hawle & Corda, 1847
Harpididae
Harpidoides Petrunina, Apollonov & Tschugaeva, 1983
Harpinopsis Stephensen, 1925
Harporhynchus Sars, 1862
Harporrhynchus Bergroth, 1905
Harringtonacaste Baldis & Blasco, 1978
Harrycaris Briggs & Rolfe, 1983
Hartella Matthew, 1885
Hartmannia Bassiouni, 2002
Hartshillina Lake, 1940
Hassiana Schallreuter, 2001
Hastagnostidae
Hastifaba Cooper, 1946
Hastiremopleurides Yin, 1980
Hatangia Egorova & Savitsky, 1968
Hauquinchaia
Hausiella Kobayashi, 1955
Hausmanni
Hausmannia Hall & Clarke, 1888
Hawkinsaspis Rasetti, 1968
Hawkinsia Rasetti, 1965
Hawleia Prantl & Snajdr, 1957
Hayesocythere Swain, 1993
Hazarania Wolfart, 1970
Hebe Risso, 1826
Hebediscidae
Hebeia Guo & Duan, 1978
Hectoria Lu, 1975
Hederacauda Kobayashi, 1960
Hejinaspis Zhang Jinlin & Wang Shaoxin, 1984
Helena Risso, 1826
Helepagetia Jell, 1975
Helicorhabdosoma Brölemann, 1916
Helieranella Baldis, Gonzalez & Perez, 1984
Helimus Latreille, 1823
Helioharpes Pribyl & Vanek, 1981
Helioproetoides
Helioproetus Richter, 1919
Helmdachia Schudack, 1998
Helmetia Walcott, 1918
Heloiulus Verhoeff, 1932
Helokybe Thomas, 1979
Hemibarrandia Prantl & Pribyl, 1949
Hemicaridina Ortmann, 1890
Hemicricometopus Lu, Chang, Chien, Chu et al., 1974
Hemicrupturus Green, 1832
Hemicrypturus Corda, 1847
Hemicryptus Zittel, 1885
Hemicycloleaia Raymond, 1946
Hemicythera Sars, 1925
Hemikaolishania Zhang, 1983
Hemilithobius Stuxberg, 1875
Heminagara Jackson, 1935
Hemiphoberia Fritsch, 1899
Hemisphaerium Czerniavsky, 1878
Henadoparia Öpik, 1967
Hepatophylus Quidor, 1912
Heptabronteus Webby, 1974
Heptalasmis Gray, 1825
Hepteasmis Leach, 1826
Heraspis Wandas, 1983
Herbstium Leach, 1814
Hercantyx Öpik, 1963
Herse Hawle & Corda, 1847
Herynus Desmarest, 1825
Hesa Richter, 1941
Hesca Budde-Lund, 1908
Heshilafuella Jiang, 1995
Heterelos Rafinesque, 1815
Heterelus Rafinesque, 1814
Heterilos Rafinesque, 1814
Heteroaspididae
Heterobranchipus Verrill, 1869
Heteroglyphaea Colosi, 1921
Heterolimulidae
Heteropachyiulus Lohmander, 1936
Heteroporiulus Silvestri, 1897
Heterostylis Sars, 1920
Heterotarbidae
Heterovorhoeffia Fritsch, 1899
Hewenia Zhou, 1977
Hexacopyge Yuan & Zhou, 1998
Hexacosta Farsan, 1981
Hexianella Zhang, 1983
Hexianolithus Zhang, 1983
Heyelingella Zhang & Yuan, 1980
Hibbertia Jones & Woodward, 1899
Hibbertopteridae
Hicksiidae
Hidascutellum Kobayashi & Hamada, 1977
Hiella Straus-Dürkheim, 1829
Highgatella Shaw, 1955
Hilboldtina Scott & Summerson, 1943
Hiltermanniana Bassiouni, 2002
Hindermeyeria Hupé, 1953
Hintzeia Harrington, 1957
Hiodesmus Cook, 1896
Hippias Rafinesque, 1815
Hippocarcinus Desmarest, 1825
Hippocaricyphus Coutière, 1907
Hipponicharionoides Chen Runye, 1999
Hirtiligia Van Name, 1936
Hispaniaspis Hammann, 1992
Histiomona Öpik, 1967
Hoekaspiella Rusconi, 1950
Hoffetella Hupé, 1953
Holanshaniidae
Holdenia Cooper, 1953
Hollardia Alberti, 1964
Hollardops Morzadec, 1997
Hollites Coryell & Sample, 1934
Holmdalia Robison, 1988
Holmiidae
Holocephalites Zhou, 1982
Holomeris Hawle & Corda, 1847
Holoscalpellum Pilsbry, 1907
Holotrachelidae
Holotrachelus Holm, 1898
Holoubkocheilus Mergl, 1994
Holoubkovia Pribyl & Vanek, 1969
Holstonia Resser, 1938
Holubaspis Pribyl, 1951
Holubia Kloucek, 1934
Homagnostoides Kobayashi, 1939
Homalonotidae
Homalops Remelé, 1885
Homalopteon Salter, 1867
Homalopyge Jaanusson, 1956
Homerocythere Swain, 1993
Homoglossa Raymond, 1912
Homoserolis Nordenstam, 1933
Honanaspis Chang, 1959
Honania Lee MS., 1965
Hongshiyanaspis Zhang & Lin, 1980
Hongyanchiella Jiang, 1995
Hopolichoides
Houghtonites Raymond, 1931
Houhongfeiella Olempska, 1999
Houmaia Zhang & Wang, 1985
Houmengia Qiu, 1983
Housiella Kobayashi, 1955
Housiidae
Howellaspis Lochman & Denson, 1944
Howellisaura Bock, 1953
Howellites Bock, 1953
Howelluella Hupé, 1960
Hsiaella
Hsiaiella Resser & Endo, 1935
Hsiaoshia Endo, 1944
Hsuchuangia Lu & Zhu, 1983
Huaibeia Bi, 1983
Huainania Qiu, 1983
Hualongella Lin & Zhang, 1979
Hualongia Zhou, 1996
Huamiaocephalus Qiu, 1983
Huangnigangia Han & Ju, 1983
Huanjiangites Lu & Zhou, 1990
Huanoproetus
Huaquinchaia Rusconi, 1955
Huaquinchaya Rusconi, 1955
Huayuania Peng, Lin & Chen, 1995
Huilichia Rusconi, 1955
Hukasawaia Kobayashi, 1953
Hukasawia
Humaencrinuroides Nan, 1985
Humeia Ormiston, 1975
Humilogriffithides Inai, 1936
Hunanaspis Zhou, 1977
Hunanocephalus Lee (? Hsiang Lee-wen), 1963
Hunanolenus Liu, 1977
Hunanoproetus Yang Jialu, 1981
Hunanopyge Peng, 1984
Hundwarella Reed, 1934
Hungaiidae
Hungia Walcott, 1913
Hunickenolithus Baldis & Pothe, 1995
Hunnanocephalus
Hunnebergia Tjernvik, 1956
Huochengia Zhang, 1981
Hupeia Kobayashi, 1944
Hupeidiscus Lu, Chang, Chien, Chu et al., 1974
Hupeolenus Geyer, 1990
Hupetina Sdzuy, 1978
Huzhuia Chu, 1965
Hyadella Czerniavsky, 1878
Hyalodaphnia Schoedler, 1866
Hyaloides Schellenberg, 1939
Hyalolepas Annandale, 1909
Hyalopelta Guérin-Ménéville, 1857
Hyalosoma Wagner, 1868
Hyamonus Rafinesque, 1814
Hyboaspis Raymond, 1920
Hybocephalus Remelé, 1885
Hydrolaenus Salter, 1867
Hydromeritius Verhoeff, 1934
Hypaproetus Wu, 1977
Hyperagnostus Kobayashi, 1955
Hyperbolochilus Ross, 1951
Hypericera Latreille, 1831
Hypermecaspis Harrington & Leanza, 1957
Hypermekaspis Henningsmoen, 1957
Hyperoparia Zhang, 1983
Hyphanturgus Waga, 1839
Hypodicranotus Whittington, 1952
Hystricuraspis Ivshin, 1955
Hystricuridae
Iaidjahus Budde-Lund, 1904
Iamna Bovallius, 1886
Iassa Leach, 1814
Iberocoryphe Hammann, 1977
Iberogallus Attems, 1927
Ibexaspis Pribyl & Vanek, 1985
Ichangia Chang, 1957
Ichangiidae
Ichangolithus Lu, 1963
Ichiyamella Kobayashi & Hamada, 1986
Ichthyomyzocus Hesse, 1873
Idahoiidae
Idiomorphina Croneis, 1939
Idiona Chamberlin, 1946
Idiorapha
Idiorhapha Whittington, 1953
Idioura Zhang & Yuan, 1980
Idolagnostus Öpik, 1967
Idotoega Lockington, 1877
Iduia Sun, 1977
Ifersiktia Hinz-Schallreuter, 1993
Iglesius Costa, 1883
Ignoproetus Snajdr, 1977
Ignotogammaris Dybowski, 1926
Ignotogregatidae
Ignotogregatus Zhang Wentang & Jell, 1987
Ijacephalus Ogienko, 1974
Iliocyprella Daday, 1900
Iliophilus Lilljeborg, 1902
Illaenidae
Illaenopsis Salter, 1865
Illaenoscutellum Kobayashi & Hamada, 1974
Illaenula Chlupac, 1977
Illaenuridae
Illtydaspis Fritz, 1991
Ilyas Leach, 1814
Ilyocyprois Masi, 1906
Ilyodes Scudder, 1890
Ilyrocythere Klie, 1939
Incaia Whittard, 1955
Inceptoridae
Incisifex Dahmer, 1937
Incisopyge Pillet & Courtessole, 1985
Indodiaptomus Kiefer, 1932
Indoestheria Novozhilov, 1954
Ingkabolbina Becker, 2001
Inglefeldia Repina
Inikanella Lermontova, 1960
Iniospheniscus Öpik, 1979
Iniotoma Öpik, 1967
Inkouia Chang & Fan, 1960
Innitagnostus Öpik, 1967
Inosacotes Öpik, 1975
Inouyiidae
Inouyina Poletayeva, 1936
Inouyops Resser, 1942
Inoyellaspis Ivshin, 1952
Insecta
Insecutoridae
Intejocaris Chernyshev, 1953
Interalia Öpik, 1967
Interruptula Schallreuter, Kanygin & Hinz-Schallreuter, 2001
Inversibolbina Schallreuter, 1995
Iohomia Hu, 1971
Iolgia Kraevsky, 1965
Iphigenia Thomson, 1882
Iphimediopsis Della Valle, 1893
Iphryia Chamberlin, 1941
Ipsolonia Novozhilov, 1953
Iranella Hupé, 1955
Iraniulus Lohmander, 1932
Irannella
Iranochresterius Peng, Geyer & Hamdi, 1999
Iranochuangia Kobayashi, 1960
Irbitaspis Korobeinikova, 1974
Irgitkhemia Chernysheva, 1977
Irinia Egorova & Savitsky, 1968
Irvingellina Kobayashi, 1938
Irvingelloides Kobayashi, 1935
Irvinsella
Isabelinia Rabano, 1989
Isahelinia
Isalaux Frederickson & Pollack, 1952
Isalauxina Maksimova, 1962
Isbergia Warburg, 1925
Ischyrocheles Cocco, 1832
Ischyrophyma Whittington, 1963
Ischyropsalidae
Ishpella Petrunina, 1984
Isidreana Rusconi, 1954
Isidrella Rusconi, 1955
Isochirus Desmarest, 1823
Isocolus Zittel, 1885
Isoctomesa Rafinesque, 1831
Isoculus Angelin, 1854
Isojulus Fritsch, 1899
Isolus Rafinesque, 1815
Isopotamonautes Bott, 1955
Isoprusia Bruton, 1966
Isoxys Walcott, 1890
Issafenia Hupé, 1960
Issafeniella Geyer, 1990
Isyrakella Rosova, 1985
Isyrakopeltis Rosova, 1985
Itagnostus Öpik, 1979
Italoiulus Verhoeff, 1932
Itcheriella Ogienko, 1969
Ithycephalus Resser, 1938
Ithyektyphus Shaw, 1956
Ityophoridae
Ityophorus
Ivanopleura Snajdr, 1984
Iveria Shergold, 1980
Ivshinagnostus
Ivshiniellus Korobov, 1966
Iwayaspis Kobayashi, 1960
Ixalichnus Callison, 1970
Iyouella Geyer & Palmer, 1995
Izarnia Feist, 1974
Jachalipisthia Schallreuter, 1996
Jaekelopteridae
Jaeridina H. Milne Edwards, 1840
Jainiana Mannikeri, 1996
Jakutidae
Jakutus Lermontova, 1951
Jalonella Hupé, 1953
Janerea Rafinesque, 1814
Janetina Coryell & Malkin, 1936
Jangudaspis Ogienko, 1956
Jangudina Koptev, 1965
Janirilata Menzies, 1951
Janischewskya Batalina, 1927
Janxilithus
Japanoniscus Verhoeff, 1928
Japonoleaia Novozhilov, 1952
Japonoscutellum Pribyl & Vanek, 1972
Jaskovitchella Repina, 1975
Jasmundia Buchholz, 1998
Jasperia Thomas & Holloway, 1988
Javobius Chamberlin, 1944
Jeanrogerium Novojilov, 1960
Jeholaspis Kobayashi, 1953
Jemtella Thorslund, 1940
Jenkinsonia Robison, 1971
Jessievillia Hohensee, 1989
Jiagouia Qiu, 1983
Jialaopsis Lu, Chang, Chien, Chu et al., 1974
Jianchangia Guo & An, 1982
Jianfengia Hou, 1987
Jiangjunshania Qiu, 1983
Jiangsuaspis Lin, 1983
Jiangsucephalus Qiu, 1983
Jiangsuia Lin & Zhou, 1983
Jiangxiaspis Zhang, 1983
Jianshania Luo & Hu, 1999
Jianxilithus Zhang & Zhou, 1976
Jiawangaspis Zhang, 1983
Jiia Zhou Zhiyi & Zhang Jinlin, 1978
Jimachongia Yuan & Yin, 1998
Jimanomocare Yuan & Yin, 1998
Jimaoshania Qiu, 1983
Jingheella Xiang & Zhang, 1984
Jingxiania Chien, 1974
Jinia Zhang & Wang, 1985
Jinnania Lin & Wu, 1980
Jinshaella Yin, 1978
Jinxiaspis Guo & Duan, 1978
Jiubaspis Zhou & Yin, 1978
Jiumenia Yuan, 1980
Jiuquania Li, 1982
Jiuxiella Liu, 1977
Jiwangshania Zhang & Wang, 1985
Jixianaspis Zhang, 1995
Jixianella Zhang, Babcock, Xiang, Sun, Luo & Jiang, 2001
Jixiania Zhang, 1995
Johoaspis Lazarenko, 1959
Jonotus Meyer, 1848
Jorina Nierstrasz, 1918
Josephulus Warburg, 1925
Josina Lochman & Hu, 1960
Juannettia Wilson, 1920
Jubileia Kobayashi, 1938
Jucundaspis Repina, 1980
Judaeoiulus Verhoeff, 1930
Judaiella Lermontova, 1951
Judomiella Lazarenko, 1962
Judomiidae
Jujuyops Baldis & Blasco, 1978
Juliaspis Semashko, 1969
Julopsis Heer, 1874
Junggarella Hsiang & Zhang, 1981
Juraleberis Vannier & Siveter, 1996
Juraspis Egorova, 1972
Juriietella Jegorova, 1981
Juxta Ward, 1942
Kablikia Geinitz, 1862
Kabukiia Zhang, 1987
Kabutocrania Kobayashi, 1960
Kadyella Pokrovskaya, 1959
Kailia Chang, 1974
Kailiella Lu, Chang, Chien, Chu et al., 1974
Kainellidae
Kainelloides Lisogor, 1974
Kaipingella Kuo, 1965
Kalbarria McNamara & Trewin, 1993
Kallidecthidae
Kaltanleaia Novozhilov, 1952
Kaltatina
Kamerunillo Verhoeff, 1942
Kameruthelum Verhoeff, 1942
Kameschkoviella Repina, 1959
Kameschkowiella Repina, 1960
Kamlacus Petrunina, 1984
Kampecaris Page, 1856
Kanabius Chamberlin, 1920
Kanchanaburopyge Wolfart, 2002
Kanfuqingia
Kaniniella Sivov, 1955
Kanlingia Zhang, 1981
Kanoshia Harrington, 1957
Kaolishaniella Sun, 1935
Kaolishaniidae
Kaotaia Lu, 1962
Karagandoides Ivshin, 1983
Karagassiema
Karakolia Chernysheva, 1959
Karataspis Ergaliev, 1983
Karginella Hahn, Hahn & Ramovs, 1990
Karlia Walcott, 1888
Kasachaspis Ivshin, 1955
Kasachstania Maksimova, 1972
Kasatchaspis Ivshin, 1962
Kassinius Ivshin, 1952
Kathleenella Ludvigsen, 1983
Kathrynia Westrop, 1986
Katunia Romanenko & Romanenko, 1962
Katunicare Romanenko, 1967
Katzungia Schallreuter, 2000
Kaufmannella Sdzuy, 1979
Kayseraspis Harrington, 1938
Kazelina
Kazellina Sivov, 1955
Kebubius Chamberlin, 1952
Kegeliella Lütke, 1990
Kegelops Alberti, 1970
Keidelaspis Harrington, 1937
Keidelia Harrington & Leanza, 1957
Kelameilina Jiang, 1995
Kellettella Delo, 1930
Kemperiana Bassiouni, 2002
Kendallina Berg, 1959
Kennacryphaeus Lieberman & Kloc, 1997
Kepingaspis Chang, 1965
Kepisis Hu, 1971
Keporya Chamberlin, 1941
Kerberodiscus Bassett, Owens & Rushton, 1976
Kerbinella Jegorova, 1984
Kerfornella Henry, 1976
Kermanella Wolfart, 1974
Kerygmachela Budd, 1993
Ketmeniidae Novozhilov, 1957
Ketyna Rozova, 1963
Keveaspis
Khalfinella Elkin, 1964
Khankaspis Repina & Okuneva, 1969
Khroumiriophilus Attems, 1908
Kiaeritia Schallreuter & Hinz-Schallreuter, 1999
Kielanella Apollonov, 1974
Kielania Vanek, 1963
Kijanella Repina, 1958
Kildiniella Lermontova, 1940
Kilianicaris Van Straelen, 1924
Kilianocaris
Kilmahogia Lamont, 1975
Kimitella Melnikova & Michailova, 1999
Kindbladia
Kindblandia Frederickson, 1948
Kinderlania Antsygin, 1977
Kingstonella Rozova, 1960
Kingstoniidae
Kingstonioides Rasetti, 1963
Kinsabia Lochman, 1940
Kiokella Kobayashi, 1942
Kirengelia
Kirengina Ogienko, 1974
Kirkbyites Johnson, 1936
Kirkbyrhiza Becker & Lundin, 1995
Kirkdomina Tripp, 1962
Kiskinella Romanenko & Romanenko, 1962
Kitatagnostus Ergaliev, 1965
Kitatella Petrunina, 1960
Klabavia Pribyl & Vanek, 1969
Klausmuelleria Siveter, Waloszek & Williams, 2003
Kleptothule Budd, 1995
Kllmaxocephalus Sun & Zhu, 1977
Kloedenellina Coryell & Johnson, 1939
Klotziella Raymond, 1928
Knechtelia Lochman, 1950
Koataia Lee, 1962
Kobayashella Ivshin, 1983
Kobayashia Harrington, 1938
Kobayashipeltis Maksimova, 1978
Kochiellina Palmer & Halley, 1979
Kodymaspis Prantl & Pribyl, 1950
Koenigia Salter, 1865
Kogenium Kobayashi, 1935
Kokomopteridae
Koksorenus Koroleva, 1992
Kokuria Kobayashi, 1935
Kolbaspis Repina, 1979
Kolbinella Repina, 1960
Kolbinia Koptev, 1962
Koldinia Walcott & Resser, 1928
Koldiniella Sivova, 1955
Koljumbina Lazarenko, 1960
Kolpura Resser & Endo, 1935
Kolymella Chugaeva, 1973
Kolymoproetus Maksimova, 1978
Komaspididae
Komaspis Kobayashi, 1935
Komatia Barnard, 1932
Kontrastina Rozova, 1964
Koobonnia Tomashpol'skaya, 1965
Koorthis
Kooteniellina Sivov, 1955
Kootenina Fedyanina, 1962
Koraipsis Kobayashi, 1934
Kormagnostella Romanenko, 1967
Korolevium Pribyl & Vanek, 1985
Koshkulaspis Koptev, 1969
Kosovoproteus Snajdr, 1981
Kotisopeltis
Kottixerxes Schram, 1971
Kotuia Kobayashi, 1944
Kotysopeltis Vanek, Pek & Kupkova, 1990
Kozloskiaspis
Kozlowskiaspis Branisa & Vanek, 1973
Kozuriscapha Schallreuter, 1996
Krambedrysia Hahn, Hahn & Brauckmann, 1992
Krauselloides Meidla, 1996
Krohbole Kobayashi & Hamada, 1972
Krolina Repina, 1960
Ktenoura Lane, 1971
Kuamaia Hou, 1987
Kuanyangia Hupé, 1953
Kueichowiidae
Kuetsingocephalus Lee & Wang, 1963
Kujandaspis Ivshin, 1953
Kujandina
Kuljumbina Lazarenko, 1960
Kulmiella Hahn & Hahn, 1968
Kulmogriffithides Hahn, Hahn & Brauckmann, 1983
Kulyambopeltis
Kulyumbopeltis Rozova, 1968
Kulyumbopeltus
Kungeja Novozhilov, 1957
Kunihirella Bonaduce, Abate & Barra, 1994
Kunlunia Jiang & Lin, 1995
Kunmingaspis
Kunobius Chamberlin, 1912
Kunshanagnostus Qian & Zhou, 1984
Kunshanaspis Zhang & Zhou, 1985
Kupwaria Shah & Sudan, 1983
Kuraspis Chernysheva, 1960
Kuraspoides Ogienko & Garina, 1999
Kuruktagaspis Zhang, 1981
Kuruktagella Zhang, 1981
Kushanopyge Chu, 1959
Kustarachnidae
Kweichowilla
Kylindrogaster Verhoeff, 1939
Kymagnostus Hohensee, 1989
Kymataspis Geyer, 1990
Kysyltamia Novozhilov, 1957
Labiostrella Rozova, 1964
Labiostrina Poletaeva, 1972
Labradoria Resser, 1936
Labradorina Ivshin, 1978
Labricola Malm, 1874
Lacorsalina Bursky, 1970
Lacunoporaspis Elkin (also as Yolkin), 1966
Lada Wrzesniowski, 1879
Ladadiscus Pokrovskaya, 1959
Laddella Spivey, 1939
Ladeuxia Pillet, 1969
Laethoprusia Ramsköld, 1991
Laevanotella Meidla, 1996
Laevibole Brauckmann, 1982
Laevicypris Krstic, 1995
Laeviulus Berlese, 1884
Lajishanaspis Chu, 1979
Lakaspis Kobayashi, 1937
Lakella Kobayashi, 1962
Lakiestrella
Lakota Holmes, 1909
Lalax Holloway & Lane, 1998
Lamanskytes Balashova, 1966
Lamarella Croneis & Funkhouser, 1938
Laminurus Repina, 1960
Lamisca Gray, 1843
Lampropelta Guérin-Ménéville, 1857
Lampropeltis Öpik, 1967
Lamproscopia Gistl, 1848
Lanarkopteridae
Lanczichebairdia Gramm, 1997
Landea Dybowski & Grochowski, 1894
Laneites Pribyl & Vanek, 1985
Langgonbole Kobayashi & Hamada, 1973
Langgoni
Langgonia Kobayashi & Hamada, 1971
Langqia Yin, 1978
Languedopeltis Pillet, 1988
Langyashania Lu & Zhu, 1980
Lannacus Tjernvik, 1956
Lanonyx Chamberlin, 1953
Laoyingshania Yuan & Li, 1999
Lapidaria Tjernvik, 1956
Lapidivadum Schallreuter & Schafer, 1999
Larifugula Ludvigsen, 1983
Lasaguaditas Edgecombe, Chatterton, Waisfeld & Vaccari, 1998
Lashushania Zhang, 1999
Lassothereua Verhoeff, 1944
Lateuloma Dean, 1973
Latibole Hahn & Hahn, 1969
Laticephalus Pokrovskaya, 1959
Laticoryphe Erben, 1966
Latikingaspis Geyer, 1990
Latilorenzella Kobayashi, 1960
Latipalaeolenus Guo & An, 1982
Latiredlichia Hupé, 1953
Latoucheia Hupé, 1953
Latro Billberg, 1820
Latuzella Fedjanina & Romanenko, 1999
Latzeliidae
Latzelipus Verhoeff, 1934
Laurieopteridae
Lauzonella Rasetti, 1944
Lavachilina Tinn & Meidla, 2002
Lavatiella Melnikova, 1999
Lavsanodiscus
Lazarenkiura Rozova, 1977
Leaianella Novazhilov, 1952
Leanchoiliidae
Lebescontia Jones & Woodward, 1899
Lecanoaspis Ivshin, 1962
Lecanopygidae
Leda Mayer, 1880
Leiaspis Wu & Lin, 1980
Leichneyella Öpik, 1967
Leichuangia Chang, 1963
Leightonella Croneis & Gale, 1938
Leiobienvillia Rasetti, 1954
Leiochilus Reuss, 1857
Leiodaphnia Dybowski & Grochowski, 1895
Leioscutellum Wu, 1977
Leioshumardia Whittington, 1965
Leiostegiidae Bradley, 1925
Leiostegioides Kobayashi, 1934
Leiostrototropis Raymond, 1937
Lemoneites Flower, 1969
Lenacare Egorova, 1976
Lenadiscus Repina, 1965
Lenagraulos Egorova, 1976
Lenaspis Suvorova, 1959
Leocephalus Ivshin, 1962
Leodesmus Mauries & Geoffroy, 2000
Leoforteyia Waisfeld, Vaccari, Chatterton & Edgecombe, 2001
Lepadaria Reichenbach, 1828
Lepadites Blumenbach, 1803
Lepidella Vogdes, 1893
Lepidepecreopis Stephensen, 1925
Lepidilla Matthew, 1885
Lepiditta Matthew, 1885
Lepidocarididae
Lepidocephaloides Repina, 1964
Lepidoderma Reuss, 1855
Lepleurus Rafinesque, 1820
Lepsia Quoy, 1839
Leptagnostus Lu & Lin, 1989
Leptapsidia Bovallius, 1886
Leptaspidia Bate & Westwood, 1866
Leptestheriella Daday, 1923
Leptocheles M'Coy, 1849
Leptochuangia Lu & Qian, 1983
Leptocubanus
Leptocypris Sars, 1903
Leptocytheridea Stephenson, 1937
Leptocytheromorpha Purper, 1979
Leptodampius Chamberlin, 1938
Leptoderos Hoare & Merrill, 2004
Leptodiscus Baal, 1937
Leptolimnadia Novozhilov, 1954
Leptomastigoiulus Verhoeff, 1897
Leptophilus Chamberlin, 1915
Leptopilus Raymond, 1924
Leptopodia Leach, 1815
Leptosoma Desmarest, 1825
Leptynophilus Chamberlin, 1940
Lereboulleta Vandel, 1944
Lermontoviella Pokrovskaya, 1959
Lermontoviidae
Lernaeoceropsis Fowler, 1911
Lerneocera Blainville, 1822
Lerneomyzes Berthold, 1827
Lerneopus Fischer, 1831
Letniites Rozova, 1977
Leucoiulus Verhoeff, 1894
Leuconopsis Walker, 1896
Levenkia Novozhilov, 1955
Leverhulmia Anderson & Trewin, 2003
Leviceraurus Hessin, 1988
Levinia Rusconi, 1950
Levirobergia Petrunina, 1984
Levisaspis Rasetti, 1943
Leydigiopsis Sars, 1901
Lianglangshania Zhang & Wang, 1985
Liangshanaspis Chang, 1974
Liangshandiscus Zhang, 1980
Liangshanocephalus Chen, 1975
Lianhuashania Guo & Duan, 1978
Liaoningaspis Chu, 1959
Liaoningella Lu & Qian, 1983
Liaotropis Schrank, 1975
Liaotungia Resser & Endo, 1935
Liaoyangaspis Chang, 1959
Libertella Hu, 1971
Lichakephalidae
Lichakephalina Antsygin, 1973
Lichanocoryphe Owens & Tilsley, 1995
Lichapyge Callaway, 1877
Lichengaspis Zhang & Wang, 1985
Lichengia Kobayashi, 1942
Lichidae
Lichnocephala
Lichnocrites Jiang, 1995
Liexiaspis Liu, 1982
Ligiscus Lane & Owens, 1982
Ligometopus Delo, 1938
Lilurella Bory de St. Vincent, 1822
Limataceps Repina, 1969
Limbocalymene Maksimova, 1978
Limnadella Girard, 1854
Limnaetes Blasius, 1842
Limnestheria Wright, 1920
Limnicytheridea Forel, 1894
Limniphacos Blaker & Peel, 1997
Limnoprimitia Kummerow, 1949
Limocheles Müller, 1927
Limpeina Ogienko, 1984
Lindsayella Coryell & Williamson, 1936
Linguaproetus Alberti & Ruchholz, 1964
Lingucephalichas Phleger, 1936
Linguchuangia Zhang, 1983
Linguisaukia Peng, 1984
Lingukainella Kobayashi, 1953
Lingulocaris Salter, 1866
Linguocalymene Tomczykowa, 1991
Lingyuanaspis Guo & Duan, 1978
Linocheles Brady, 1907
Liocare Suvorova, 1981
Liocephalus Grönwall, 1902
Liocnemis Kielan, 1960
Liograpta Novozhilov, 1954
Liokootenia Qiu, 1983
Lioleaia Novozhilov, 1952
Lioleaiina Novozhilov, 1952
Liolophops Struve, 1972
Liomegalaspides
Liomesaspidae
Lioparella Kobayashi, 1937
Liopelta Suvorova, 1981
Liopsalis Meyer, 1862
Liosolenopleura Thoral, 1947
Liostracina Monke, 1905
Liostracinidae
Liparges Gürich, 1901
Liquania Zhou, 1982
Liriamnica Shergold, 1980
Lisaniella Chang, 1963
Lisaniidae Chang, 1963
Lisgocaris Clarke, 1882
Lisogoraspis Apollonov, 1974
Lisogorites Chugaeva, 1958
Lispagnostus Öpik, 1967
Litagnostoides Schrank, 1975
Litaspis Suvorova, 1960
Litavkaspis Fatka, Kordule & Snajdr, 1987
Litholepas de Blainville, 1824
Lithonaetta Eschscholtz, 1829
Lithonetta Agassiz, 1846
Litocodia Resser, 1938
Litomatopus
Litoricola Woodward, 1872
Litotix Lane & Thomas, 1978
Liuheaspis Nan, 1985
Liventalina Schneider, 1958
Liwiidae
Llandovacaste Edgecombe, 1993
Llanoaspidella Tasch, 1951
Llanoaspididae
Lobocephalina Ruzicka, 1940
Lobocephalus Ruzicka, 1940
Lobosaccus Nierstrasz & Brender, 1923
Lochmanaspis Ivshin, 1962
Lochmannia Grabau, 1937
Lochmanolenellus Lieberman, 1998
Lochriella Scott, 1942
Lockingtonia Harford, 1877
Lodenicia Prantl & Vanek, 1958
Loeipyge Kobayashi & Hamada, 1979
Loganellidae Rasetti, 1959
Loganopeltis Rasetti, 1943
Lohanpopsis Lu, 1965
Lomops Rafinesque, 1836
Lomsucaspis
Lonchinouyia Chang, 1963
Lonchobasilicus Zhou, 1980
Lonchocephalidae
Lonchopygella Xiang, 1979
Longduia Lu, Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Longduiidae
Longicoryphe Erben, 1966
Longilobus Engel & Morris, 1995
Longiproetus Cavet & Pillet, 1958
Longmenshania Lee, 1978
Longquania
Longshania Zhou, 1980
Longxianaspis Zhang & Zhu, 1979
Longxumenia Guo & Duan, 1978
Loparella Rozova, 1968
Lopeuloma Rozova, 1968
Lophiokephalion Kobayashi, 1988
Lophodesella Wu & Lin, 1980
Lophoholcus Öpik, 1967
Lophosaukia Shergold, 1971
Lopnorites Troedsson, 1937
Lordshillia Whittard, 1966
Lorensella
Lorenzellidae
Lorica Bronn, 1848
Loriella Fedyanina, 1971
Lorrettina Shergold, 1971
Loshanella Lu, 1959
Lotosoides Shergold, 1975
Lotzeia Sdzuy, 1958
Loulania Zhang, 1981
Lowtheria Pribyl & Vanek, 1981
Loxoleberis Sars, 1866
Loxonepea Öpik, 1970
Loxoparia Rasetti, 1965
Loxopeltis Rasetti, 1957
Luaspis Hupé, 1953
Luaspis Peng, Lin & Chen, 1995
Lucasella Stewart, 1936
Ludvigsenella Tremblay & Westrop, 1991
Luguoia Lu & Zhu, 2001
Luliangshanaspis Zhang & Wang, 1985
Lulongia Zhou Zhiyi & Zhang Jinlin, 1978
Lunacephalus Ivshin, 1962
Lunacrania Kobayashi, 1955
Lundinia Schallreuter, 1995
Lunkiella Melnikova, 1997
Lunolenus Lotze, 1958
Luojiashania Chang, 1974
Luottuolingia
Luotuolingia Lu & Qian, 1983
Lusampa Petrunina, 1984
Lusampa Petrunina, 1990
Lusatiops Richter, 1941
Lutesvillia Cullison, 1944
Luxella Rasetti, 1955
Luyanhaoaspis Peng, Babcock & Lin, 2001
Luyanhaoia Wittke, 1984
Lycophron Fortey & Shergold, 1984
Lydiaspis Suvorova, 1981
Lynaspis Öpik, 1967
Lynceites Goldenberg, 1870
Lyncodaphnia Herrick, 1882
Lyrapyge Fortey, 1980
Lyriaspis Whitehouse, 1939
Macedocandona Krstic & Guan, 2000
Macedoniscus Buturovic, 1954
Machaerophorus Marck, 1863
Machaerophus Marck, 1863
Machairagnostus Harrington & Leanza, 1957
Machairopus Thompson, 1888
Macnairides Lamont, 1975
Macroblepharum Alberti, 1964
Macrobole Richter, 1951
Macroculites Kobayashi, 1955
Macrocytherina Coryell & Fields, 1937
Macrogrammus Whittard, 1966
Macronoda Lochman, 1964
Macropisthopous Barnard, 1916
Macropygella Rosova, 1985
Macrotoxus Lorenz, 1906
Macrourites Schlotheim, 1820
Macrurites Agassiz, 1846
Maculichna Anderson, 1975
Macuwemuna Schallreuter, 1996
Madaoyuites Liu, 1977
Madarocephalus Resser, 1938
Madianaspis Zhang & Zhu, 1979
Maduiya Rozova, 1963
Madygenia Petrunina, 1975
Maesicopea Stebbing, 1893
Mafangia Luo & Hu, 2002
Mafangocaris Luo & Hu, 2002
Magnacephalus Stitt, 1971
Magnomma Lu & Qian, 1983
Mahaiella Yin, 1983
Maja Lomovitskaya, 1955
Majiangia Lu & Qian, 1983
Makaspis Baldis & Hansen, 1980
Makbelaspis Lisogor, 1977
Makromuktis Phleger, 1936
Malaccopleurus Verhoeff, 1937
Malacoentoma Hoeven, 1828
Malacostraca Latreille, 1802
Maladia
Maladioidella Endo, 1937
Maladioides Kobayashi, 1933
Malayaproetus Kobayashi & Hamada, 1971
Malchi Engel & Morris, 1994
Malimanaspis Baldis & Longobucco, 1979
Malinaspis Andreeva, 1985
Malongocephalus Zhang & Lin, 1980
Malongullia Webby, Moors & McLean, 1970
Malungia Lu, 1961
Malvernocare Pribyl & Vanek, 1978
Malvinella Wolfart, 1968
Malvinocooperella Lieberman, 1993
Malykania Suvorova, 1958
Manailina Bognibova, 1971
Manaspis Repina, 1960
Manchurocephalus Endo, 1944
Manitouella Berg & Ross, 1959
Mannopyge Ludvigsen, 1987
Mannschreckia
Mannschreekia Stitt, 1983
Mansiella Rozova, 1968
Mansuyella Endo, 1937
Mansuyites Shergold, 1971
Mantoushania Lu, Zhu & Zhang, 1988
Manublesia Alvaro, 1996
Maoriphimedia Hurley, 1954
Maotunia Zhang Wentang & Jell, 1987
Mapaniidae
Mapanopsis Chang, 1963
Marcaisia
Marcianella Attems, 1909
Marcouella Shaw, 1966
Mareda Kobayashi, 1942
Marekolithus
Maritimella Repina & Okuneva, 1969
Marjumiidae
Marrellidae
Marria Ruedemann, 1931
Marrolithoides Williams, 1948
Marsaisia Hupé, 1952
Martenscypridopsis Karanovic & Pesce, 2000
Maspakites Lazarenko & Datsenko, 1967
Massaiscia Verhoeff, 1942
Mastigoiulus Attems, 1894
Matania Rasetti, 1946
Mataninella Sivor, 1955
Matherellina Kobayashi, 1936
Matthewlenus Hupé, 1953
Matthoria Siveter & Williams, 1997
Mauraspis Alberti, 1967
Maustonia
Maxillopoda Dahl, 1956
Maximovella Petrunina, 1990
Mayiellidae
Mayopyge Adrain & Fortey, 1997
Mayrocaris Polz, 1994
Mcnairia Deiss, 1939
Mecicobothridae
Mecophrys Shergold, 1982
Mediomoina Arora, 1933
Meeria Frederickson, 1949
Megadunderbergia Kobayashi, 1938
Megagnostus Robison, 1994
Megagraulos Kobayashi, 1935
Megalacrus Attems, 1953
Megalaspidicus Petrunina, 1984
Megalisania Qiu, 1983
Megalograptidae
Megalonoura Norman, 1889
Megalopsis Qian, 1983
Megapalaeolenus Chang, 1966
Megaproetus Jell, 1977
Megasaphus Kacha & Petr, 1996
Megastrephon Cook, 1895
Megatemnoura Sun, 1977
Megatrichoniscus Jackson, 1938
Megepimerio Verhoeff, 1907
Megopisthus Latzel, 1880
Meischcandona Karanovic, 2001
Meisterella Ivshin, 1952
Meitanella Lin & Yin, 1978
Meitania Yuan
Meitanillaenus Chang, 1974
Meitanopsis Lu, 1975
Mekynophrys Harrington, 1938
Melanella Wade, 1911
Melanodesmus Carl, 1914
Melopetasus Schallreuter, 1979
Memmatella Zhang, 1995
Menairia
Mendociscus Rusconi, 1950
Mendodiscus Rusconi, 1950
Mendolaspis Rusconi, 1951
Mendoparabolina Rusconi, 1951
Mendosina Shergold, 1975
Meneghinella Boernemann, 1891
Meniscocorphye
Meniscocoryphe Ludvigsen, Westrop & Kindle, 1989
Menneraspidae
Menneraspididae
Menocephalites Kobayashi, 1935
Menoethius White, 1848
Menomoniidae Walcott, 1916
Mephiarges
Merebolina Gandl, 1980
Meridioscutellum Feist, 1970
Meringaspis Öpik, 1967
Meristosomo
Merlinia Fortey & Owens, 1978
Meropalla Öpik, 1967
Meroperix Lane, 1972
Merostomata Woodward, 1866
Mesagnostus Jaekel, 1909
Mesetaia Hupé, 1953
Mesoasellus Birstein, 1939
Mesobothrus Folkmanová, 1940
Mesocrepicephalus Kobayashi, 1935
Mesoctenopyge Henningsmoen, 1957
Mesodema Whitehouse, 1939
Mesoglypha Cooper, 1941
Mesolaophonte Nicholls, 1941
Mesoleaia Kobayashi, 1954
Mesolenellus Palmer & Repina, 1993
Mesonela Hope, 1851
Mesopagetia Kobayashi, 1943
Mesoporcellio Verhoeff, 1907
Mesoscapellum Hoek, 1907
Mesospheniscus Hawle & Corda, 1847
Mesotaphraspis Whittington & Evitt, 1954
Messula Leach, 1825
Mesula Gray, 1825
Metaacidaspis Qiu, 1983
Metabalangia Qian & Yuan, 1980
Metabalanus Pilsbry, 1916
Metabowmania Kobayashi, 1955
Metadiscus Kobayashi, 1943
Metadoxididae
Metagnostidae
Metagnostus Jaekel, 1909
Metagraulos Kobayashi, 1935
Metaharpes Lamont, 1948
Metaharpides Pillet & Courtessole, 1980
Metahypagnostus Qiu, 1983
Metakootenia Qiu, 1983
Metalaophonte Nicholls, 1941
Metaleaia Kobayashi, 1952
Metaleiolichas Kobayashi & Hamada, 1987
Metalioparella Qian & Qiu, 1983
Metalisania Ju, 1983
Metalonchodomas Kobayashi & Hamada, 1971
Metalutella Chen Runye, 1999
Metaphillipsia Reed, 1943
Metapilekia Harrington, 1938
Metapliomerops Kobayashi, 1934
Metaprodamesella Yuan & Yin, 2000
Metapteles Rafinesque, 1832
Metaptychopyge Balashova, 1964
Metaredlichioides Lu, Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Metarthricocephalus Zhao & Yuan, 2001
Metascutellum Snajdr, 1960
Metashantungia Chang, 1957
Metayuepingia Liu, 1977
Metisaspina Sivov, 1955
Metisaspis Rasetti, 1946
Metisella Rasetti, 1963
Metisia Resser, 1937
Metodesmus Silvestri, 1948
Metopotropis Öpik, 1967
Metoptogyrus Raymond, 1937
Mexiceuma Verhoeff, 1926
Mezocrotalus Maksimova, 1978
Miaeuloma Lu & Chien, 1978
Miagnostus Jaekel, 1909
Mial Lamont, 1975
Mianxiandiscus Zhang & Zhu, 1980
Mianxianella Zhang & Lin, 1980
Miaopopsis Lu, 1965
Micagnostus Khairullina, 1975
Micangshania Zhou, 1975
Michaspis Egorova & Savitsky, 1968
Micragraulos Howell, 1937
Microcaris Pinna, 1975
Microcoelonella Coryell & Sohn, 1938
Microdecemplicidae
Microgammarus Sovinskij, 1915
Microlepas Hoek, 1907
Micronewsomites Casier & Lethiers, 1997
Microphthalmus Gortani, 1907
Micropyge Hawle & Corda, 1847
Microscutellum Snajdr, 1960
Microthereua Verhoeff, 1905
Mictosaukia Shergold, 1975
Mictosaukioidia Lu & Zhou, 1990
Milaspis Sivov, 1960
Mileidae
Milesdavis Lieberman, 1994
Millepes Oken, 1815
Mimana Kobayashi, 1935
Mimetaster Gürich, 1932
Mimocryphaeus Gandl, 1972
Mimoleaia Novozhilov, 1954
Minicarididae
Minicephalus Lochman & Hu, 1960
Minigonus Verhoeff, 1943
Minkella Lochman & Hu, 1959
Minuinsella
Minusinella Repina, 1960
Mioeuloma Lu & Qian
Mioptychopyge Zhou Zhiyi, Dean, Yuan Wenwei & Zhou Tianrong, 1998
Miquelina Thoral, 1935
Mirabole Osmólska, 1962
Miraculaspis Romanenko, 1967
Miranda Jegorova, 1984
Miranella Pokrovskaya, 1960
Miriproetus Snajdr, 1977
Mirmor Lamont, 1978
Mirops Snajdr, 1987
Missisquoia Shaw, 1951
Missisquoiidae
Mitchellaspis Henningsmoen, 1959
Mitrobeyrichia Henningsmoen, 1954
Mixopteridae
Mjobergodesmus Verhoeff, 1924
Modellops Lieberman & Kloc, 1997
Modicia Walcott, 1924
Mohicana Cobbold, 1910
Mollisonia Walcott, 1912
Monadella Barrande, 1847
Monadina Barrande, 1846
Monanocephalus Lin & Wu, 1980
Monaxagnostus Liu, 1982
Monella Bates, 1968
Monexagnostus
Mongolobranchipus Dybowski, 1927
Monkaspis Kobayashi, 1935
Monoculites Martin, 1809
Monoculithos Perry, 1810
Monodechella
Monolaophonte Nicholls, 1941
Monoleiolophus Raymond, 1946
Monomorphichnus Crimes, 1970
Monopsites Green, 1832
Monorakidae
Monosulcatina Rozova, 1963
Montcestheria Vannier, Thiery & Racheboeuf, 2003
Moosia Walcott, 1924
Morariopus Borutzky, 1932
Moravocoryphe Pribyl & Vanek, 1978
Moravuridae
Moretaeva Hupé, 1960
Moretarva
Morgatia Hammann, 1972
Morinina Anderson, 1939
Morocconites Boucot, McClure, Alvarez, Ross, Taylor, Struve, Savage & Turner, 1989
Morrisites Gibson, 1955
Morrisitina Gibson, 1955
Moxomia Walcott, 1924
Mrakibina Morzadec, 2001
Mrassina Repina, 1964
Muchattelina
Muchattellina Repina, 1965
Muensteria Knebel, 1909
Mufushania Lin, 1965
Muhuaella Olempska, 1998
Mulciberaspis Vanek, Vokac & Horbinger, 1992
Mulcion Latreille, 1825
Munagnostus
Mundocephalina Repina, 1958
Mungyongia Kobayashi, 1961
Munija Khramova, 1980
Munijia
Murphycops Lesperance, 1968
Musconiscus Arcangeli, 1932
Myinda Stubblefield & Bulman, 1927
Myindella Hutchison & Ingham, 1967
Mymecodillo Arcangeli, 1934
Myodoprimigenia Gabbott, Siveter, Aldridge & Theron, 2003
Myona Kobayashi, 1935
Myoproetus Snajdr, 1976
Myopsomicmacca Hupé, 1953
Myopsostrenua Rushton, 1966
Myrmecomimus Öpik, 1979
Myrtonius Meyer, 1851
Mytocephala Struve, 1958
Myttonia Whittard, 1955
Nadiyella Romanenko, 1988
Naesidia H. Milne Edwards, 1837
Nagaproetus Snajdr, 1977
Nagatopedulichnus Noda & Okamoto, 1988
Nahannia Chatterton & Ludvigsen, 1976
Nahannicephalus Pratt, 1992
Namanoia Lermontova, 1951
Namanoiella Tomashpol'skaya, 1965
Nambeetella Legg, 1976
Namiolenoides Rusconi, 1952
Namuraspis Gandl, 1980
Nandanaspis Chang & Yin, 1978
Nangaocephalus Yuan, 1980
Nangaoia Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Nangaops Yuan & Sun, 1980
Nanlingia Wei & Zhou, 1983
Nannopeltis Harrington & Leanza, 1957
Nanoqia Poulsen, 1964
Nanshanaspis Chang & Fan, 1960
Nanshihmenia Chang Wen-t'ang, 1960
Napperia Swain, 1993
Naptile
Naranda Münster, 1842
Naraoiidae
Nasigerio Verhoeff, 1907
Nasomologus Sewell, 1949
Nassagetes Novozhilov, 1954
Natalobelum Verhoeff, 1924
Natatoraspis Pribyl, 1967
Nathorsthia
Nathorstia Walcott, 1912
Nattainia Vogdes, 1925
Nauplius Philippi, 1840
Naustia Ludvigsen, 1982
Navecythere Coryell & Fields, 1937
Nebidella Rasetti, 1972
Necroscilla Woodward, 1879
Necrozius A. Milne-Edwards, 1863
Nectotelson Brocchi, 1879
Nectyleus Desmarest, 1825
Nectylus Rafinesque, 1817
Neglecandona Krstic, 1993
Nehanniaspis Fritz, 1972
Neilsoniella Lamont, 1975
Neimonggolaspis Zhang & Liu, 1991
Nelegeria Korobov, 1966
Nelgakia Egorova & Pegel, 1979
Nellina Pokrovskaya, 1967
Nelocira Leach, 1818
Neltneriidae
Nemastomoididae
Nematohamma Brady & Norman, 1896
Nematoniscus Verhoeff, 1930
Nematosurus Daday, 1910
Neoacrocephalites Sivov, 1955
Neoaldanaspis Rozova
Neoanomocerella
Neobeyrichiopsis Tasch, 1953
Neobigotina Chernysheva, 1977
Neoblackwelderiella Sun, 1937
Neobournellum Attems, 1908
Neocheiruroides Yin, 1978
Neocypris Sars, 1901
Neofellerites Kozur, 1994
Neoglaphyraspis Yuan & Yin, 1998
Neohedinaspis Xiang & Zhang, 1984
Neokaskia Hahn, Hahn & Owens, 1991
Neokochina Nan & Shi, 1985
Neolaophonte Nicholls, 1941
Neolichas Curtis & Lane, 1998
Neolimnocythere Delachaux, 1929
Neomalungia
Neomyctes Chamberlin, 1951
Neoolenus Liu, 1982
Neopeltis Zhang, 1983
Neophillipsia Gheyselinck, 1937
Neophiloscia Strouhal, 1929
Neophotis Stout, 1913
Neopoliellina Repina, 1964
Neoprodamesella Yuan & Yin, 2000
Neopsilocephalina Yin, 1978
Neoredlichiidae
Neoredlichina Fedyanina, 1962
Neoscutellum Maksimova, 1978
Neoshirakiella Sun, 1979
Neosolenopleurella Ju, 1983
Neosymphyla Edwards & Belfield, 1967
Neosynphoria Pillet, 1954
Neotaenicephalus Kobayashi, 1955
Neozonocypris Klie, 1944
Nepeidae
Nephalicephalus
Neptunagnostella Pek, 1977
Nericella Rozova, 1964
Nericiaspis Tjernvik, 1955
Nerudaspis Pribyl & Vanek, 1965
Nesidiphilus Chamberlin, 1915
Nesondyla Chamberlin, 1950
Nesoprotopus Verhoeff, 1939
Nettapezoura Briggs, Lieberman, Hendricks, Halgedahl & Jarrard, 2008
Nevadiidae
Newportides Chamberlin, 1921
Nganasanella Rozova, 1963
Niachangella
Nicoljarvius Lamont, 1975
Nidanshania Zhou, 1996
Nilcgna
Nilegna Öpik, 1967
Nileidae
Nileoides Raymond, 1920
Ninaspis Ivshin, 1953
Ningkianites Lu, 1975
Ninglangella Wang & Cao, 1997
Ninglangia Lu, 1976
Ningnanaspis Sheng, 1974
Ningqiangaspis Zhang & Lin, 1980
Ningxiaspis Zhang & Zhu, 1979
Niobina Lake, 1946
Niphargonyx Derjavin, 1927
Nippoligidium Borutzki, 1950
Nipponarges Kaneko, 1984
Nipponocalymene Kaneko, 1985
Nitidocare Pribyl, Vanek & Horbinger, 1985
Nitidulopyge Pribyl & Erben, 1952
Niuchangella Chang, 1974
Nodiceps Suvorova, 1959
Nodiphillipsia Kobayashi & Hamada, 1984
Nodocephalus Attems, 1928
Nodokirkbya Kozur, 1994
Nodoparaparchites Kozur, 1994
Nodophilomedes Kornicker & Sohn, 2000
Noelaspis Ludvigsen, Westrop & Kindle, 1989
Nomadinis Öpik, 1967
Nondelosia Schallreuter, 1995
Nonix
Norasaphites Fortey & Shergold, 1984
Norasaphus Fortey & Shergold, 1984
Norasphus
Norcanolella Loranger, 1955
Nordia Rozova, 1968
Norina
Norna Münster, 1840
Norwoodiidae
Norwoodina Lochman, 1940
Nosebiria Schallreuter & Hinz-Schallreuter, 2002
Nosuwemuna Schallreuter, 2000
Notadenophilus Verhoeff, 1928
Notaiella Ogienko, 1974
Nothozoe Barrande, 1872
Notodelphyidea Stebbing, 1910
Notodelphyoida Sars, 1901
Notograptus Rusconi, 1948
Notopella Lörenthey & Beurlen, 1929
Notoporanina Lörenthey & Beurlen, 1929
Notozoe Zittel, 1885
Novagnostus Nielsen, 1997
Novakaspis Pribyl, 1946
Novakella Whittard, 1961
Novaralius Attems, 1947
Nucleurus Ramsköld, 1986
Nuevona Chamberlin, 1941
Nuferella Bradfield, 1935
Numidia Cocco, 1832
Nuttainia Eaton, 1832
Nyasestheriella Kobayashi, 1954
Nyaya Rozova, 1963
Nyctobius Chamberlin, 1917
Nymphaeops Schlüter, 1862
Nyraniidae
Nyterops Struve, 1972
Obelagnostus Shergold & Webers, 1992
Obliteraspis Ogienko, 1984
Obrucheviaspis Ivshin, 1953
Obrutschewia Tchernyshev, 1953
Occacaris Hou, 1999
Ochthoria Krueger, 1911
Ochthosia Ranzani, 1817
Octobronteus Weber, 1945
Octonariella Bassler, 1941
Oculagnostus Ahlberg, 1988
Oculeus Poletaeva & Romanenko, 1970
Oculichasmops Roomusoks, 1986
Oculishumardia Peng, Babcock, Hughes & Lin, 2003
Oculomagnus Lochman, 1966
Ocydromites Agassiz, 1846
Odontacartia Steuer, 1915
Odontalona Birge, 1909
Odonterichthus Jurich, 1904
Odontopleuridae Burmeister, 1843
Odontopyge Hawle & Corda, 1847
Odontorynchus Leach, 1830
Oehlertaspis Pillet & Vanek, 1974
Oehlertia Pillet, 1972
Oelandocaris Müller, 1983
Oenonella Fortey, 1980
Offa Jones, Kirkby & Brady, 1874
Offacolidae Sutton et al., 2002
Ogmasaphus Jaanusson, 1953
Ogmocnemis Kielan, 1960
Ogydromite H. Milne Edwards, 1837
Ogydromites Leonhard & Bronn, 1837
Ogygitella Harrington & Leanza, 1957
Ogygitoides Kobayashi, 1934
Ogygopsidae
Ohiocarididae
Ohleum Basse, 1998
Oidalaproetus Wu, 1977
Oidaloproetus
Oinochoe Thomas & Holloway, 1988
Oirotella Romanenko, 1972
Ojrotella
Okeanomeris Verhoeff, 1942
Okunevaella Repina, 1973
Oleagnostus Hinz-Schallreuter & Buchholz, 2004
Olegaspis Ivshin, 1962
Olekmanellus Repina, 1973
Olekmaspis Suvorova, 1956
Olenekina Egorova, 1970
Olenellidae Walcott, 1890
Olenelloides Peach, 1894
Olenia Ranzani, 1820
Olenidae Burmeister, 1843
Olenoidestranans
Olenophalus Tomashpol'skaya, 1965
Olgaspis Korobeinikova, 1965
Oligobothrus Latzel, 1880
Oligoniscus Dollfus, 1890
Oligopolys Chamberlin, 1946
Oligorura Carbonnel, de Klasz, de Klasz, Horvath, Lang & Oyede, 1996
Olinaspis Suvorova, 1964
Oliska Risso, 1826
Olistheroiulus Lohmander, 1936
Olotyphlops Silvestri, 1897
Olympia Risso, 1826
Omegawemuna Schallreuter, 2000
Omegops Struve, 1976
Omeipsis Kobayashi, 1951
Omeishania Sun, 1937
Omobrachyiulus Löhmander, 1936
Omphalentomis Kummerow, 1953
Ompheter Shergold, 1996
Oncagnostus Whitehouse, 1936
Onchaspis Raymond, 1925
Oncholichas Schmidt, 1885
Onchonetus
Onchonotina Lu, 1964
Onchonotopis
Onchonotopsidae
Onchonotopsis Rasetti, 1946
Onchonotus Raymond, 1924
Onchyoglomeris Verhoeff, 1906
Oncocypria Daday, 1908
Oncolichas Bergroth, 1905
Onebius Chamberlin, 1926
Onega Fedonkin, 1976
Onicites Martin, 1809
Oniscina Goldenberg, 1875
Oniscites Martin, 1809
Oniscoda Latreille, 1829
Oniscodes Berthold, 1827
Oniscomorphus Jackson, 1938
Onnicalymene Dean, 1962
Ononia Fiszer, 1885
Ontoella Chernysheva, 1961
Onukia Kobayashi & Hamada, 1976
Onychaspis Raymond, 1925
Onychocythere Tressler, 1939
Onychopodogaster Verhoeff, 1902
Oodeopus Bate, 1888
Oopsites Fortey, 1975
Oosthuizenella Cooper, 1982
Opabiniidae
Ophtalmoblaniulus Verhoeff, 1896
Ophthalmoblaniulus Verhoeff, 1896
Ophthalmopache Hesse, 1866
Opikella Thorslund, 1940
Opikium Agnew, 1942
Opiliotarbidae
Opipeuteridae
Opis Krøyer, 1842
Opoa Lane, 1972
Opsidiscinella Repina, 1965
Opsiosoryctocephalus Sundbe, 1994
Opsipolygrapta Novozhilov, 1954
Opsupharus
Opsypharus Howells, 1982
Orbitoproetus Pillet, 1969
Ordosaspis Lu, 1976
Ordosiidae Lu, 1954
Oreadella Shergold, 1975
Oreisator Geyer & Malinky, 1997
Orictocara
Orientella Repina & Okuneva, 1969
Orienturum Repina, 1973
Orienturus Repina, 1973
Origmadyla Hoffman & Pereira, 1997
Orkekeia Rusconi, 1955
Orkekia
Orloviella Sivov, 1955
Ormistonaspis Pribyl & Vanek, 1978
Ormistonia Maksimova, 1978
Ormistoniella Cooper, 1982
Ormithoeides Verhoeff, 1941
Ornitholepas Targioni, 1872
Orodes Geyer, 1990
Oromannia Verhoeff, 1940
Orometopidae
Orometopus Brögger, 1898
Orphanaspis Prantl & Pribyl, 1949
Orphnea Münster, 1839
Orriella Rasetti, 1938
Orthobalanus Hoek, 1913
Orthodesmus Cook, 1896
Orthodorsum Nan & Chang, 1982
Orthonus Miers, 1878
Orthopalame Hoek, 1879
Orthopotamonautes Bott, 1955
Orthothemos Raymond, 1946
Orthothereua Verhoeff, 1905
Orthotrigonium Verhoeff, 1933
Ortmannicus Fowler, 1911
Oryctocare
Oryctocarella Tomashpolskaya, 1961
Oryctocephalidae Beecher, 1897
Oryctocephalina Lermontova, 1940
Oryctocephaloides Chien & Yuan, 1978
Osceolina Ulrich, 1930
Osiribolbina Schallreuter, 1998
Osirusa Risso, 1826
Ostenocaris Arduini, Pinna & Teruzzi, 1984
Ostiogammarus Karaman, 1931
Ostracoda Latreille, 1802
Otadenus Lament, 1978
Otarionella Weyber, 1965
Otarionellina Koroleva, 1978
Otarionides Alberti, 1969
Otekmaspis
Otenaspella
Otion Leach, 1818
Otium Agassiz, 1846
Otodechenella Zhou, Siveter & Owens, 2000
Otrophesa Risso, 1826
Ottoaspis Vanek, Vokac & Horbinger, 1992
Ouijjania Hupé, 1953
Ourachaerus Kinahan, 1859
Ourachoerus White, 1847
Ourikaia Geyer, 1990
Ovalagnostus Lu, 1974
Ovalocephalus Koroleva, 1959
Owensella Pribyl & Vanek, 1978
Oxyagnostus Öpik, 1967
Oxydromia A. Milne-Edwards, 1881
Oxygonaspis Zhang, 1983
Oxyuropoda Carpenter & Swain, 1908
Ozelus Rees, 1807
Pachyaspidella Semashko, 1971
Pachybdella Diesing, 1850
Pachycypris Claus, 1892
Pachymus Bulicheva, 1955
Pachyproetus Lütke, 1990
Pachyredlichia Chang, 1966
Pacificurus
Pacootella Shergold, 1991
Pagetiidae
Pagetina Lermontova, 1940
Pagobius Chamberlin, 1917
Pagodiidae
Pagodioides Zhu Zhaoling & Wittke, 1989
Pagometopus Henningsmoen, 1959
Pagura Emmons, 1860
Pagurilius Melin, 1939
Pahvantia Robison & Richards, 1981
Paichiashania
Paitangulus Chamberlin, 1943
Paivinia Rosova, 1985
Palacorona Shergold, 1971
Palaeadotes Öpik, 1967
Palaeinachus Woodward, 1866
Palaeno Robineau-Desvoidy, 1849
Palaeocampa Meek & Worthen, 1865
Palaeocarabus Salter, 1861
Palaeocarididae
Palaeocharinidae
Palaeocorystes Bell, 1862
Palaeocrepicephalus Kobayashi, 1935
Palaeocreusia Hall & Clarke, 1888
Palaeocypridopsis Jiang & Lin, 1995
Palaeocypris Brongniart, 1883
Palaeocythere Tolmachoff, 1926
Palaeodesmus Wilson & Anderson, 2004
Palaeoharpes Lu & Qian
Palaeolenella Repina, 1960
Palaeolenidae
Palaeolenides Egorova, 1967
Palaeolentus
Palaeoniscus A. Milne-Edwards, 1843
Palaeonotopus Brocchi, 1877
Palaeopalaemonidae
Palaeopemphix Gemmellaro, 1890
Palaeophillipsia
Palaeophreatoicidae
Palaeophyllipsia Sugiyama & Okano, 1944
Palaeoplax A. Milne-Edwards & Brocchi, 1879
Palaeopyge Salter, 1856
Palaeorchestia Zittel, 1885
Palaeosoma Jackson & Brade-Birks, 1919
Palaeosphaeroma Geinitz, 1861
Palaeosphaerotherium Peach, 1914
Paleander Holthuis, 1950
Palella Howell, 1937
Palemansuyia Yuan & Yin, 1998
Paleobius Chamberlin, 1952
Paleodechenella Maksimova, 1970
Paleoenoides
Paleofossus Pokrovskaya, 1959
Paleoleptestheria Novozhilov, 1954
Paleolimnadiopsis Raymond, 1946
Paleonotopus Brocchi, 1877
Paleooryctocephalus Repina, 1964
Paleopseudobalanus Fisher, 1954
Palinostus Bate, 1888
Palinuridia Carter, 1889
Paljnosytus Bate, 1888
Pallasius Leach, 1814
Pallinurus Weber, 1795
Palmeraspis Repina, 1973
Palmettaspis Fritz, 1995
Palmina Sowerby, 1839
Paloeno Robineau-Desvoidy, 1849
Palpebrops Lieberman, Edgecombe & Eldredge, 1991
Palquiella Suarez-Soruco, 1975
Pambdelurion Budd, 1998
Pamina Gray, 1825
Pamiritellus
Pamirites Balashova, 1966
Pamirotchechites Balashova, 1966
Pamirotellus Balashova, 1968
Panacus Eddy & McCollum, 1998
Panarchaegonus
Pandaspinapyga Esker & Levin, 1964
Panderiidae
Panlongia
Panoploeopsis Kunkel, 1910
Panxinella Lin, 1974
Paokannia Ho & Lee, 1959
Papyriaspididae
Paraacidaspis Poletaeva, 1956
Paraantagmus Qiu, 1980
Paraaojia Rosova, 1988
Paraaulacopleura Chaubet, 1937
Parabadiella Chang, 1966
Parabailiella Thoral, 1946
Parabarrandia Prantl & Pribyl, 1949
Parabasilicus Kobayashi, 1934
Parabathycheilus Mergl, 1984
Parabellefontia Hintze, 1953
Parablackwelderia Kobayashi, 1942
Parabolinina Lazarenko, 1966
Parabolinoididae
Parabotryllophilus Leigh-Sharpe, 1934
Parabouleia Eldredge, 1972
Parabriscoia Kobayashi, 1935
Parabulbaspis Zhang, 1981
Parabumastides Ji, 1987
Parabumasttides
Paracalmonia Struve, 1958
Paracalvinella Zhou, 1980
Paracalymene Fillet, 1968
Paracalymene Liu, 1982
Paracalymenemene Jell, 2003
Paracedaria Duncan, 1949
Paraceratopyge Balashova, 1967
Parachangaspis Liu, 1982
Parachangshania Chien, 1958
Parachatiania Yuan & Yin, 1998
Parachaunoproetus Yuan, 1988
Paracheiruroides Repina, 1973
Parachittidilla Lin & Wu, 1980
Parachuangia Qiu, 1983
Paracidaspis
Paraclithrocytheridea Bassiouni, 2002
Paracoeloma Lörenthey & Beurlen, 1929
Paracolpocoryphe Destombes, Hupe & Jeannette, 1959
Paracrepicephalus Lochman, 1936
Paracreusia Abel, 1928
Paracrocephalites Poulsen, 1954
Paracryphaeus Gandl, 1972
Paracyamella Zhou & Xiang, 1993
Paracybantyx Ludvigsen & Tripp, 1990
Paracybeloides Hupé, 1955
Paracyclisticus Verhoeff, 1943
Paracyclocaris Barnard, 1930
Paracyliosoma Verhoeff, 1928
Paradalmanites Pillet, 1954
Paradamesella Yang
Paradamesops Yang, 1974
Paradechenella Richter, 1912
Paradesmarestia Czerniavsky, 1878
Paradictyites Liu, 1982
Paradionide Chang & Fan, 1960
Paradiscus Kobayashi, 1943
Paradistazeris Zhu, 1980
Paradolepas Macdonald, 1869
Paradoxididae
Paradrepanuroides Zhao, Huang & Mao, 1984
Paradudu Hahn, Hahn & Müller, 2003
Paraencrinurus Antelo, 1973
Paraenshia Qiu, 1983
Paraeosoptychoparia Qiu, 1983
Paraerbia Repina, 1958
Paraeremiproetus Pillet, 1973
Paraeucytherura Bassiouni, 2002
Parafallotaspis Fritz, 1972
Parafrithjofia Yuan, 1988
Parafuchouia Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Paragetia
Paraglyphea Beurlen, 1928
Paragnostus Jaekel, 1909
Paragraphylus Coryell & Rozanski, 1942
Paragraulos Lu, 1941
Paragriffithides Reed, 1943
Paragunnia Qiu, 1983
Parahabelia Simonetta, 1964
Paraharpes Whittington, 1950
Paraharpides Pillet & Courtessole, 1980
Parahawleia Zhou, 1976
Parahiolites Kobayashi, 1967
Parahutsonia Swain, 1993
Paraichangia Lee, 1978
Paraidiocythere Bassiouni & Luger, 1996
Parainouyia Lin & Wu, 1980
Parairvingella Kobayashi, 1938
Parajialaopsis Zhang & Yuan, 1980
Parakailia Wu, 1979
Parakainella Kobayashi, 1953
Parakalumnidae
Parakaolishania Sun, 1979
Parakingasidoides
Parakingaspidoides Hupé, 1960
Paraklodinioidia Endo, 1937
Parakoldinia Rozova, 1960
Parakoldinioidia Endo, 1937
Parakomaspis Chu, 1960
Parakoptura Guo & Duan, 1978
Parakotuia Chu, 1960
Paralardeuxia Pillet, 1973
Paraleaia Raymond, 1946
Paraleiolichas Kobayashi & Hamada, 1987
Paraleiostegium Chu & Zhang, 1979
Paraleolichas
Paralepidoproetus Alberti, 1981
Paraleptoredlichia Qiu, 1980
Paraleptotrichus Arcangeli, 1927
Paralevisia Zhang Wentang & Jell, 1987
Paraliaoningaspis Chu, 1965
Paralisaniella Qiu, 1983
Parallehelcura Yang & Wang, 1991
Paralonella Birge, 1909
Paralorenzangella Jell, 2003
Paralorenzella Zhang, 1983
Paralutella Chen Runye, 1999
Paramaladioidella Lu & Zhu, 1980
Paramalungia Chang, 1966
Paramansuyella Endo, 1937
Paramarria Wells, 1944
Paramecephalus Zhou & Yin, 1978
Paramegalaspis Thoral, 1935
Paramenocephalites Kobayashi, 1960
Paramenomonia Chu, 1959
Paramgaspis Yuan & Zhao, 1997
Paramicroparia Zhang, 1981
Paramicruropus Stebbing, 1899
Paramirabole Yuan, 1998
Paramonoceratina Zhou, 1995
Paramonolepis Czerniavsky, 1878
Paramphoton Yang, 1978
Parampyx Zhang, 1981
Parancistrum Verhoeff, 1943
Paranevadella Palmer & Repina, 1993
Parangustibole Yuan & Xiang, 1998
Paraniambia Collinge, 1914
Paranileus Kobayashi, 1951
Paranomocare Lee & Yin, 1973
Paranomocarella Yang, 1978
Paranopoiulus Lohmander, 1939
Paranorwoodia Rasetti, 1945
Paranumia
Paraojia Sun & Zhu, 1977
Paraolenoides Ivshin, 1952
Paraonychopyge Pillet, 1974
Paraorlovia Chernysheva, 1956
Paraoryctocephalops Tomashpol'skaya, 1960
Paraoryctocephalus Tomashpolskaya, 1961
Paraostenia Secretan, 1985
Parapachyaspis Qiu, 1983
Parapagetia Repina, 1964
Parapalacorona An & Duan, 1982
Parapalebralia
Parapaleomerus
Parapalpebralia Erben, 1959
Parapaokannia Zhang & Lin, 1980
Parapeishania Qiu, 1983
Paraperiomma Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Paraphelaspis Rasetti, 1965
Paraphillipsinella Lu & Chang, 1974
Paraphoreotropis Shaw, 1968
Paraphorocephala Li & Xiao, 1984
Paraplagiura Zhang, 1983
Parapleisticantha Yokoya, 1933
Paraplesiagraulos Qiu, 1983
Paraplesiograulos
Paraplethopeltis Bridge & Cloud, 1947
Paraplicatolina Benedetto, 1979
Parapliomera Maksimova, 1962
Paraporcellio Verhoeff, 1917
Paraporilorenzella Qiu, 1983
Paraproetus Pribyl, 1964
Paraprotolenella Zhu & Jiang, 1981
Paraprotopus Verhoeff, 1939
Paraptychopyge Balashova, 1964
Parapunctella Jiang, 1982
Paraqingshuiheella Lu & Qian, 1984
Pararania
Pararedlichia Hupé, 1952
Pararistias Robertson, 1892
Parasajanaspis Chernysheva, 1972
Parashantungia Chu, 1959
Parashuiyuella Yuan & Zhao, 1997
Parashumardia Sun, 1979
Parasolenoparia Li, 1982
Parasolopleurena Jell, 2003
Parasphaerexochus Chugaeva, 1973
Parastenoniscus Verhoeff, 1908
Parastylonuridae
Parastyra Pirlot, 1934
Parataitzuia Chang, 1963
Paratermierella Hupé, 1953
Parathanas Bate, 1888
Paratiresias Petrunina, 1975
Paratokephalops
Paratollaspis Kobayashi, 1943
Paratretaspis Dean, 1973
Paratribola Czerniavsky, 1878
Paratrinucleus Whittington, 1941
Paratungusella Repina, 1964
Paratzuchiatocnemis Wu Jinwei & Xia Shufang, 1990
Paraulrichia Wang & Cao, 1997
Parawarburgella Maksimova, 1975
Parawatophilus Crabill, 1955
Parawuania Zhang, 1983
Parawutingaspis Lee, 1978
Parayinites Zhang & Lin, 1980
Parayoungia Chatterton & Perry, 1984
Parayuepingia Zhou, 1982
Parazhenbaspis Zhu & Lin, 1983
Parazhongtiaoshanaspis Qiu, 1983
Paraziboaspis Nan & Chang, 1982
Parbothropolys Verhoeff, 1938
Parcironiscus Verhoeff, 1941
Pardailhania Thoral, 1947
Parehmania Deiss, 1939
Pareluma Omer-Cooper, 1923
Parensirogenes Birshtein & Vinogradov, 1955
Parenthesilimatia Schallreuter, 2001
Pareops Hupé, 1953
Parethelum Verhoeff, 1942
Pareuloma Rasetti, 1954
Parevenkaspis Kramarenko, 1952
Parfusiulus Verhoeff, 1941
Parhomoeogammarus Schellenberg, 1943
Parisoceraurus Zhou
Parkaspis Rasetti, 1951
Parkesolithus Campbell & Durham, 1970
Parodiscus Hupé, 1952
Parodolepas Macdonald, 1869
Paropisa Stebbing, 1899
Parorlovia
Parotostigmus Pocock, 1896
Parthenolambus A. Milne-Edwards, 1878
Particeps Reed, 1943
Parvancorina Glaessner, 1958
Parvancorinidae
Parvicyathus Kozur, 1994
Parvidumus Kobayashi & Hamada, 1980
Parvigena Owens, 1973
Parviiulus Javlovski, 1929
Parvixochus Pribyl & Vanek, 1985
Paryfenus
Patalolaspis Qian, 1983
Patellabalanus Hoek, 1913
Pateraspis Prantl & Pribyl, 1947
Patomaspis Ogienko, 1974
Patronaspis Ivshin, 1962
Pattonia Peach, 1899
Pauciella Rozova, 1964
Paulacoutoia Purper, 1979
Paulianicarus Chappuis, 1952
Pauliceps Repina, 1965
Pauloterminus Taylor, 2002
Paurochaeturus Silvestri, 1916
Pauropoda
Pauropoposis Remy, 1941
Payandea Blau, Grün & Senff, 1993
Pearsobius Causey, 1942
Pearylandia Robison, 1988
Pectiniungius Bollman, 1889
Pectocaris Hou, 1999
Peculicephalina Qian Yiyuan, 1985
Pedinaspis Ivshin, 1983
Pedinocephalus Ivshin, 1953
Pedinopariops Struve, 1972
Peichiashania Chang, 1959
Peishanoides Zhang, 1983
Pelicephalus Kurtz, 1975
Pelitlina Haas, 1968
Pelorodiaptomus Light, 1939
Peltabellia Whittington, 1953
Peltoma Rafinesque, 1832
Pemphia Meyer, 1838
Pemphicyclus Raymond, 1946
Penarosa Öpik, 1970
Penchiopsis Lu, 1976
Pentagonalia Geyer, 1988
Pentalasmis Leach, 1817
Pentalepas Blainville, 1824
Pentaschuleridea Swain, 1993
Pentelasmis Leach, 1818
Pentheus Koch, 1841
Pentrema Rafinesque, 1820
Pephricarididae
Peracheilus Ludvigsen, 1986
Peraiella
Perakaspis Kobayashi & Hamada, 1972
Peratagnostus Öpik, 1967
Perexigupyge Brezinski, 1988
Perforina Romanenko, 1967
Periallaspis Bruton, 1967
Periambus Norman, 1905
Peribolites Fischer, 1807
Pericopyge Benedetto & Martel, 1978
Perimecturidae
Periommella Resser, 1938
Perioura Resser, 1938
Perirehaedulus Adrain & Edgecombe, 1995
Perischoclonus Raymond, 1925
Perischodory Raymond, 1937
Perissopliomera Ross, 1970
Perissopyge Blaker, Nelson & Peel, 1996
Perkeomeris Verhoeff, 1936
Perliproetus Richter, 1927
Permoproetus Toumansky, 1935
Peronopsella Sdzuy, 1967
Peronopsidae Westergard, 1936
Perplana Sidaravichene, 1992
Perryus Gass & Mikulic, 1982
Persansabella Coryell & Sohn, 1938
Perspicarididae
Perthiellus Lament, 1975
Perunaspis Pribyl, 1949
Pesaiella Rozova, 1964
Pesaiina Poletaeva, 1969
Petalepas Cantraine, 1835
Petalilium Luo & Hu, 1999
Petalocephalus Lu & Qian, 1983
Petalocerus White, 1856
Peteinura Bate, 1888
Peteinurus Bate, 1888
Petigurus Raymond, 1913
Petrbokia Pribyl & Vanek, 1965
Petrianna Siveter, Williams, Peel & Siveter, 1996
Petrocephaliidae
Petroniscus Verhoeff, 1908
Petruninaspis Ivshin, 1962
Peziziopsis Ju, 1983
Phacopidae Hawle & Corda, 1847
Phacopididae
Phacopidina Bancroft & Lamont, 1949
Phacopina Clarke, 1913
Phaeacobius Attems
Phaenogammarus Dudich, 1941
Phalachromidae
Phalacromidae
Phalacromina Kobayashi, 1962
Phaldagnostus Ivshin, 1960
Phalloiulus Brölemann, 1897
Phanogona Cook, 1896
Phanoptes Hawle & Corda, 1847
Pharostomaspis Abdullaev, 1970
Pharostomatidae
Phaselops
Phaseolops Whittington, 1963
Phasganocaris Novák, 1887
Phauloiulus Attems, 1939
Phigaleia Rathbun, 1906
Philipsmithiana Lieberman & Kloc, 1997
Phillipsiidae Oehlert, 1886
Phillipsinellidae
Philogeonus Chamberlin, 1920
Philoscodillo Jackson, 1938
Phlysacium Hawle & Corda, 1847
Phoidagnostoides Capera, Courtessole & Pillet, 1978
Pholadocaris Woodward, 1882
Phoreotropis Raymond, 1924
Phoriotropus
Phorocephala Lu, 1965
Phosphora Leach, 1814
Phractocytheridea Sutton & Williams, 1939
Phractodemus Flower, 1901
Phthiriopsis Giard, 1879
Phylaconmerium Verhoeff, 1951
Phylacops Cooper & Kindle, 1936
Phylacteridae
Phylacterus Raymond, 1924
Phyllamphion Reinhardt, 1849
Phyllaspis Richter, 1863
Phylluropus Barnard, 1932
Phymaspis Poulsen, 1964
Phymatocarcinus Reuss, 1871
Physemataspis Evitt & Tripp, 1977
Physocaris Salter, 1860
Physodes Desmarest, 1825
Phytophilaspis Ivantsov, 1999
Pianaspis Saito & Sakakura, 1936
Pibius Chamberlin, 1943
Pibylia Erben, 1951
Pichinturia Rusconi, 1958
Pichunia Rusconi, 1958
Pichynturia Rusconi, 1958
Pieckoxerxes Starobogatov, 1988
Piedmontia Resser, 1938
Pileaspis Sun, 1990
Pilekiidae
Pilgrimia Duncan, 1944
Piliolites Cozzens, 1846
Pilletina Haas, 1970
Pilletopeltis Pribyl, 1973
Pinctus Wilson, 1951
Pinella Ivanova, 1955
Pingluaspis Zhang & Wang, 1986
Pingluia Zhang & Wang, 1985
Pinglusapis
Pingquania Guo & Duan, 1978
Pionaspis Zhang, 1983
Piperella Mayer, 1903
Piretilina Sidaravichene, 1992
Piriproetoides Alberti, 1981
Piriproetus Erben, 1952
Piscidula Reichenbach, 1836
Pisinnocaris Hou & Bergstrom, 1998
Pisonella Glassell, 1938
Pisumia Pokrovskaya, 1970
Pjatkovaspellus Khairullina, 1973
Placentella Wilson, 1935
Placoparina Whittard, 1940
Placosema Öpik, 1967
Plagiascetidae
Plagiolophus Bell, 1857
Plagiurella Resser, 1937
Plakhinella Lazarenko, 1965
Planaspis Repina, 1959
Planilobus Engel & Morris, 1995
Planktacartia Steuer, 1915
Planocephalus Zadorozhnaya, 1967
Planokaskia Engel & Morris, 1994
Planolimbus Geyer, 1990
Platagnostus Howell, 1935
Plataspella Wilson, 1949
Plateurytion Attems, 1909
Platopolichas Gürich, 1901
Platyantyx Whittington, 1953
Platyasaphus Ivantsov, 2000
Platycephalion Boeck, 1828
Platychelidae
Platychilina Kummerow, 1939
Platycoryphe Foerste, 1919
Platyharpes Whittington, 1950
Platylisania Zhang Wentang & Jell, 1987
Platynotus Conrad, 1838
Platyptychopyge Xia, 1978
Platysaukia Kobayashi, 1960
Plebiellus Wu & Lin, 1980
Plecanima Rees, 1807
Plectasaphus Jaanusson, 1953
Plecteuloma Shergold, 1975
Plectifer
Plectrella Ludvigsen, Westrop & Kindle, 1989
Plectrifer Öpik, 1967
Plectrocrania Zhang & Yuan
Pleisticanthoides Yokoya, 1933
Plesiagraulos Chang, 1963
Plesiamecephalus Lin & Qiu, 1983
Plesigangderria Qiu, 1983
Plesiocilia Yuan & Yin, 1998
Plesioconvexa Lieberman, 1993
Plesioinouyella Qiu, 1983
Plesiomalvinella Lieberman, Edgecombe & Eldredge, 1991
Plesiomegalaspis Thoral, 1946
Plesionevadia Lieberman, 2001
Plesioparabolina Harrington & Leanza, 1942
Plesioperiomma Qiu, 1980
Plesiosironidae
Plesiowensus Lieberman, 1994
Plesiowuania Bi, 1983
Plesisolenoparia Zhang & Yuan, 1980
Plesiyuepingia Xiang & Zhou, 1987
Plethoconium Attems, 1944
Plethopeltella Kobayashi, 1944
Plethopeltidae
Plethopeltoides Khramova, 1968
Pleurarmadillidium Verhoeff, 1900
Pleurinodus
Pleurocaris Calman, 1911
Pleurojulus Fritsch, 1899
Pleuroschendyla Brölemann & Ribaut, 1911
Pleuroxalonella Birge, 1909
Plexocera Templeton, 1837
Pliciwemuna Schallreuter, 1996
Pliomeraspis Harrington, 1957
Pliomeridae
Pliomeridius Leanza & Baldis, 1975
Ploteristes Siveter, 1994
Ploutoschendylurus Brölemann & Ribaut, 1913
Plurinodus Öpik, 1967
Plusiarges Gürich, 1901
Plusiochaeturus Silvestri, 1916
Pluteocaris Claus, 1876
Plutonia Hicks, 1871
Poculicephalina Qian, 1986
Podakoglyphus Oudemans, 1938
Podexus Rafinesque, 1815
Podocrates Schlüter, 1862
Podoliproetus Snajdr, 1980
Podolites Balashova, 1968
Podowrinella Clarkson, Eldredge & Henry, 1977
Poecillopus Jarocki, 1825
Pogonoligia Jackson, 1927
Pokrovskayaspis Khairullina, 1973
Poletaevella Dalmatov & Repina, 1971
Poliellaspidella Poletaeva, 1960
Poliellaspis Lermontova, 1940
Poliellina Poletayeva, 1936
Poliocheridae
Politinella Ivshin, 1978
Poljakovia Bognibova, 1971
Polyariella Rozova, 1963
Polycertaspis
Polycliniophile Hesse, 1864
Polycyrtaspis Öpik, 1967
Polydinotes Öpik, 1975
Polyeres Rouault, 1847
Polyplatus Budde-Lund, 1908
Polyrhynchus Richiardi, 1877
Polytomurus Hawle & Corda, 1847
Polytrema Férussac, 1822
Pontastacus Bott, 1950
Ponticulocythereis Keen, 1996
Pontimirim Holthuis, 1954
Pontiobius Guérin-Ménéville, 1857
Pontipalpebralia Lutke, 1968
Pontobrachyiulus Lohmander, 1939
Ponumia Hu, 1970
Popigaia Egorova, 1967
Popogaia
Popovkiaspis Balashova, 1966
Popovkites Balashova, 1966
Populella Dybowski, 1926
Populsenella
Poratocricus Fahlander, 1937
Porilorenzella Chang, 1963
Poriplethopeltis Yuan & Yin, 1998
Poropolys Chamberlin, 1925
Porrassia Marcus, 1912
Porrhoiulus Lohmander, 1936
Portaginus Lesperance, 1968
Porterfieldia Cooper, 1953
Portlockia M'Coy, 1846
Portunascus Giard & Bonnier, 1890
Poshania Chang, 1959
Posidoniscus Verhoeff, 1942
Postceratia Schallreuter & Hinz-Schallreuter, 1998
Postfallotaspis Orlowski, 1985
Poulsenella Rozova, 1963
Poulseniella Poulsen, 1964
Practodemus Flower, 1901
Pradesia Thoral, 1935
Pradoella Mammann, 1977
Praeanaspides Woodward, 1908
Praecoparia Lochman, 1966
Praedechenella
Praehanaites Becker, 2000
Praeleaia Lutkevich, 1929
Praelepadidae
Praelepas Tchernyschev, 1930
Praepatokephalus Lochman, 1964
Praetanicythere Herrig, 1997
Pragoproetus Snajdr, 1977
Preconocephalina Pokrovskaya, 1961
Preodontochile Degardin & Pillet, 1984
Prephacopidella Destombes, 1964
Prestalia Eldredge & Branisa, 1980
Presteronyx Milner, 1858
Pribylia
Priceaspis Legg, 1976
Priminsolenia Meidla, 1996
Primoriella Repina, 1973
Primorinella
Princetonella Lochman, 1953
Principestreptus Hoffman, 1996
Prionchelius Petunnikov, 1914
Prionocandona Gupta, 1989
Prionocytheretta Mehes, 1941
Prionorhynchotus Tilesius, 1818
Prionorhynchus Leach, 1830
Prionothalthybius Brölemann, 1909
Prismenaspis Henderson, 1976
Proaeger Langerhan, 1915
Proannonyx Schellenberg, 1953
Proapatokephaloides Ergaliev, 1980
Proaraiopleura Zhang, 1981
Proasaphiscidae
Proasaphiscina Lin & Wu, 1980
Proasaphus Balashova, 1966
Proaulacopleura Kobayashi, 1936
Proavus Poletaeva, 1972
Probilacunaspis Peng, 1990
Probolichas Phleger, 1936
Proboliella Walker, 1906
Probolops Delo, 1935
Probothropolys Verhoeff, 1907
Probowmania Kobayashi, 1935
Probowmaniella Chang, 1963
Probowmanops Ju, 1983
Procamptocythere Swain, 1993
Procephalops Whittard, 1966
Prochangshania Chu Chao-ling, 1960
Prochonaesea Hesse, 1873
Prochydoridae
Prodalmanitina Chugaeva, 1968
Prodamesella Chang, 1959
Prodamessella
Prodiacoryphe
Prodigiosus Hoare & Mapes, 2000
Prodikelocephalites Yuan & Yin, 1998
Prodontochile Kobayashi & Hamada, 1971
Prodrevermannia Alberti, 1964
Proetidae Salter, 1864
Proetidella Bancroft & Lamont, 1949
Proetiella Harrington & Leanza, 1957
Proetina Pribyl, 1946
Proetocephalus Lutke, 1977
Profallotaspis Repina, 1965
Proglomeridae
Progonocythere Sylvester-Bradley, 1948
Progonophora Brolemann, 1932
Prohedinaspis Romanenko, 1977
Prohedinella Sivov, 1955
Prohutsonia Swain, 1993
Proichangia Zhang & Zhu, 1980
Proinouyia Qiu, 1980
Prokootenia Lermontova, 1940
Prokops Chlupac, 1971
Prolaminurus Tomashpol'skaya, 1965
Proliaoningaspis Zhang & Wang, 1985
Prolloydia Kobayashi, 1960
Prolonchocephalus Palmer, 1981
Promacropyge Lu, 1964
Promeitania Yuan & Zhao, 1997
Promenites Rafinesque, 1832
Promesus Lochman, 1964
Prometeoraspis Poulsen, 1960
Propagurites Lorenthey & Buerlen, 1929
Proparacytheridea Purper, 1979
Propatokephalops
Propator Troschel, 1863
Propeltura
Prophylace Berthold, 1827
Prophylax Latreille, 1829
Prophysemataspis Lesperance & Desbiens, 1995
Proplectrum Kesling & McMillan, 1951
Proricaris Baily, 1870
Proricephalus Westrop, 1986
Proromma Lane, 1971
Proscharyia Peng, 1990
Proshantungaspis Qiu & Lin, 1983
Prosocephalus Campbell, 1977
Prosopiscidae
Prospectatrix Fortey, 1981
Prosthetes Bergroth, 1905
Protacanthina Gandl, 1972
Protagraulos Matthew, 1895
Protaitzehoia Yang, 1978
Protaldonaia Sdzuy, 1961
Protarchaegonus Sdzuy, 1955
Proteocypris Brady, 1905
Proterothriops Ghigi, 1921
Protillaenus Raymond, 1937
Protobronteus Snajdr, 1960
Protocarcinus Salter & Woodward, 1865
Protocaris Walcott, 1885
Protocerauroides Chatterton & Perry, 1984
Protochittidilla Qiu, 1980
Protochthoniidae
Protocyphaspides Pribyl & Vanek, 1977
Protodesmarestia Czerniavsky, 1878
Protoencrinurella Legg, 1976
Protohedinia Endo, 1944
Protoincaia Baldis & Pothe, 1995
Protolenella Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Protolenidae
Protolenoides Poletaeva, 1960
Protolenus Matthew, 1892
Protolichas Reed, 1902
Protolloydolithus Williams, 1948
Protomonolepis Czerniavsky, 1878
Protonia Rafinesque, 1814
Protoniscus Blasco & Ramos, 1978
Protophillipsinella Chen, 1975
Protoplanes Verhoeff, 1935
Protopliomerella Harrington, 1957
Protoptychopyge Balashova, 1960
Protoryctocara Zhou, 1977
Protoryctocephalus Chow, 1974
Protoscalpellum Hoek, 1907
Protoscutellum Snajdr, 1960
Protostygina Prantl & Pribyl, 1949
Protozoe
Protrachoparia Zhang, 1983
Protypus Walcott, 1886
Proveedoria Lochman, 1948
Proxiniobe Hoel, 1999
Pruvostinodies Hupé, 1953
Pruvostinoides Hupé, 1953
Psalaspis Resser, 1937
Psammasticus Nicholls, 1935
Psammylla Rafinesque, 1817
Psammyllus Desmarest, 1823
Pscemiaspis Abdullaev, 1970
Pselliodes Chamberlin, 1923
Pseudacrocephalaspina Ergaliev, 1980
Pseudagnostidae Whitehouse, 1936
Pseudalokistocare Repina, 1965
Pseudalona Sars, 1901
Pseudamphoton Chu & Zhang, 1979
Pseudampyxina Ju, 1983
Pseudaphelaspis Lu & Zhu, 1980
Pseudartabas Lamong, 1948
Pseudarthron Selden & White, 1983
Pseudasaphus Schmidt, 1907
Pseudepimeria Chevreux, 1912
Pseuderichthus
Pseuderiphia Reuss, 1857
Pseudestheria Raymond, 1946
Pseudeugonocare Peng, 1992
Pseudeurystheus Schellenberg, 1931
Pseudichangia Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Pseudinouyia Zhang & Yuan, 1995
Pseudoacasta Nilsson-Cantell, 1930
Pseudoacicaudus
Pseudoacrocephalites Rosova, 1968
Pseudoaechmina Salas, 2002
Pseudoalokistocare Sundbe, 1994
Pseudoasiatella Repina, 1978
Pseudobarrandia Courtessole & Fillet, 1976
Pseudobasilicoides Balashova, 1971
Pseudobasiliella Balashova, 1971
Pseudobasiloides Liu, 1982
Pseudobergeronites Jago & Webers, 1992
Pseudobirmanites Lee, 1978
Pseudoblackwelderia Zhu & Zhang, 1983
Pseudobollandia Hahn, Hahn & Brauckmann, 1985
Pseudobriartina Wang, 1994
Pseudocalvinella Qiu, 1984
Pseudocalymene Pillet, 1974
Pseudocheirurus Prantl & Pribyl, 1947
Pseudoclelandia Ross, 1951
Pseudoclelanida
Pseudocobboldia Hupé, 1960
Pseudocrangon Schlüter, 1862
Pseudocrecephalaspina
Pseudocrepicephalus Chu & Zhang, 1979
Pseudocryptops Pocock, 1891
Pseudocyclopyge
Pseudocyllene Czerniavsky, 1878
Pseudocypretta Klie, 1933
Pseudocypridina Roth, 1933
Pseudocyprilla Jiang, 1995
Pseudocyrtosymbole Yuan & Xiang, 1998
Pseudodechenella Pillet, 1973
Pseudodiaptallous Johnson, 1939
Pseudodigonus Pillet, 1961
Pseudodromilitis Beurlen, 1928
Pseudoeobronteus Maksimova, 1979
Pseudoeteraspis Chernysheva, 1950
Pseudofuchouia Zhang, 1981
Pseudogerastos Lütke, 1990
Pseudogriphasaphus Peng, 1992
Pseudohysterolenus Harrington & Leanza, 1957
Pseudohystricurus Ross, 1951
Pseudoinouyina Repina, 1965
Pseudoiulia Hou & Bergstrom, 1998
Pseudokadyella Repina, 1966
Pseudokegelites Hoare & Mapes, 2000
Pseudokingstonia Palmer, 1965
Pseudokoldinella Timokhin, 1988
Pseudokoldinia Rozova, 1968
Pseudokoldinioidia Endo, 1944
Pseudolancastria Lee, 1963
Pseudolevinia Rusconi, 1951
Pseudolimnadia Novozhilov, 1954
Pseudoliostracina Kobayashi, 1938
Pseudolisania Kobayashi, 1935
Pseudolorenzella Romanenko, 1970
Pseudomaladioides Liu, 1982
Pseudomapania Yuan & Yin, 1998
Pseudomegalaspis Jaanusson, 1953
Pseudomexicella Sundbe, 1994
Pseudomonaspis Richter, 1917
Pseudomonolepis Czerniavsky, 1878
Pseudonaraoia Budil, Fatka & Bruthansova, 2003
Pseudonileus Kobayashi, 1951
Pseudoniscidae
Pseudonotella Zaspelova, 1952
Pseudoolenoides Hintze, 1953
Pseudoöthrix Brady, 1924
Pseudopaokania Yin, 1978
Pseudopaokannia
Pseudoparabolbina Schallreuter, 2000
Pseudoparakrithella Purper, 1979
Pseudoperonopsis Harrington, 1938
Pseudopetigurus Prantl & Pribyl, 1949
Pseudophalacroma Pokrovskaya, 1958
Pseudophlyctiscapha Zenkova, 1995
Pseudopilla Schallreuter, 1996
Pseudoplesiagraulos Lu, Zhu & Zhang, 1988
Pseudopliomera Lu & Chien, 1978
Pseudopollicipes Maubeuge, 1943
Pseudoproetus Poulsen, 1934
Pseudoprotolenella Zhu & Lin, 1983
Pseudoptychopyge Balashova, 1964
Pseudoptyocephalus Legg, 1976
Pseudoredlichia Zhang & Lin, 1980
Pseudoresserops Repina, 1965
Pseudosalteria Raymond, 1924
Pseudosarkia Shergold, 1996
Pseudosaukia Rasetti, 1944
Pseudoscalpellum Joleaud, 1914
Pseudosilesiops Hahn, Hahn & Brauckmann, 1994
Pseudosolenoparia Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Pseudosolenopleura Sun, 1935
Pseudospatulina Hahn & Hahn, 1968
Pseudosphaerillo Verhoeff, 1926
Pseudospinella Kozur, 1994
Pseudostygina Zhou, 1982
Pseudotaitzuia Qiu, 1983
Pseudotalbotina Benedetto, 1979
Pseudotermierella Hupé, 1960
Pseudotrinodus Kobayashi & Hamada, 1971
Pseudovendia Boynton & Ford, 1979
Pseudowutingaspis Lee, 1978
Pseudoyiliangella Yin, 1978
Pseudozacanthopsis Repina, 1960
Pseudozacantopsis
Pseudstrepula Öpik, 1937
Psilacella Whittard, 1952
Psilocara Fortey, 1974
Psilocephalops Lu & Chang, 1974
Psilostracus Chang, 1963
Psiloyuepingia Qian & Qiu, 1983
Psimisa Rafinesque, 1815
Pteriograpta Novozhilov, 1954
Pterisopodus Boone, 1918
Pterocephaliidae Kobayashi, 1935
Pterocephalops Rasetti, 1944
Pterocephalopsinus Jell, 2003
Pterochirus Münster, 1836
Pterochuangia Lu & Qian, 1983
Pterocodella Croneis & Gale, 1938
Pterocoryphe Feist, 1976
Pterolichas Gürich, 1901
Pteroredlichia Chang, 1966
Pterotrum Luo & Hu, 2002
Pterygocera Berthold, 1827
Pterygocerus Latreille, 1825
Pterygometopidae
Pterygometopidella Wedekind, 1911
Pterygopoda Berthold, 1827
Ptilillaenus Lu, 1962
Ptyalistes Gistl, 1847
Ptychagnostidae Kobayashi, 1939
Ptychaspididae Raymond, 1924
Ptychometopus Schmidt, 1894
Ptychoparellina
Ptychopariidae
Ptychoparioidae
Ptychoparioides Ruzicka, 1940
Ptychoparoides
Ptychopleurites Kobayashi, 1936
Ptyctolorenzella Lin & Wu, 1980
Ptyttstrigis Hohensee, 1989
Puanella Lu & Zhou, 1990
Puanocephalus Lu & Zhou, 1990
Pugilator Nikolaisen, 1991
Pugionicauda Westrop, 1986
Pulcherproetus Lütke, 1990
Pulchricapitus Kurtz, 1975
Pulvillaspis Romanenko, 1967
Pumilina Repina, 1959
Punctaspis Shaw, 1968
Punctoprimitia Stewart & Hendrix, 1945
Punillaspis Baldis & Longobucco, 1979
Punka Fortey, 1979
Purkynia Fritsch, 1899
Pusillabole Alberti, 1973
Pusillaboles
Pycnogonida Latreille, 1810
Pycnogonites Quenstedt, 1852
Pygaspis Beurlen, 1934
Pygmaclypeatus Zhang, Han & Shu, 2000
Pygmobius Chamberlin & Wang, 1952
Pylojulus Fritsch, 1899
Pyraustocranium Ross, 1951
Pyricythereis Howe, 1936
Pyrimetopus Pribyl & Vanek, 1980
Pytine Fortey, 1975
Pyttstrigis
Qaidamocypris Yang Fan, Sun & Cao, 1995
Qiandongaspis Yuan & Yin, 1998
Qiannanagraulos Yuan & Zhao, 1997
Qiaodiella Zhang, Lin & Zhou, 1980
Qiaotingaspis Chang, 1966
Qiaotouaspis Guo & An, 1982
Qijiangia Xiang & Ji, 1987
Qilianaspis Lin & Zhang, 1979
Qingkouia Zhang, Lin & Zhou, 1980
Qingshuiheella Lu & Qian, 1983
Qingshuiheia Nan, 1976
Qingshuihella Zhang Jinlin, 1980
Qingzhenaspis Yin, 1978
Qinlingialingia Jell, 2003
Qitaina Jiang & Lin, 1995
Qu Durkoop, Mensink & Plodowski, 1967
Quadrahomagnostus Chu, 1959
Quadraschuleridea Swain, 1993
Quadratapyge Zhou, 1977
Quadratillaenus Wu, 1987
Quadratispina Gandl, 1972
Quadratoproetus Alberti, 1967
Quadriasmussia Kobayashi, 1954
Quadribola Czerniavsky, 1880
Quadrileaia Kobayashi, 1954
Quadrogryphaeus Durkoop, Mensink & Plodowski, 1967
Quadrops Morzadec, 2001
Quasipolycope Jones, 1995
Quebecaspis Rasetti, 1944
Quilianshania Chu, 1960
Quilicanella Rusconi, 1952
Quinquecosta Tripp, 1965
Quitacetra Öpik, 1967
Quitalia Öpik, 1967
Quyuania Xia, 1978
Raaschela Lochman, 1938
Raashellina Rozova, 1963
Rabduchopetalum Verhoeff, 1900
Rabienops Struve, 1989
Rabuloproetus Snajdr, 1977
Rabutina Khairullina, 1973
Rachura Scudder, 1878
Radiopyge Farsan, 1981
Radioscutellum Snajdr, 1972
Radioscuttelum
Radiurus Ramsköld, 1983
Radonia
Raduginella Egorova, 1958
Raerinproetus Basse, 1996
Rampartaspis Loch, 1993
Ramphidoma Gray, 1825
Randicephalus Ivshin, 1962
Raniletta Barthélemy, 1841
Raninellopsis Böhm, 1928
Ranunculoproetus Snajdr, 1977
Raphioampyx Baldis & Pothe, 1995
Raphiophoridae
Raracephalus Repina, 1964
Raragnostus Khairullina, 1975
Rasettaspis Ivshin, 1983
Ratinkaspis Pribyl & Vanek, 1977
Raulinsia Leach, 1814
Ravienops
Rawlinsella Shaw, 1956
Rawops Hupé, 1953
Raybatella Kempf, 2010
Rayella Teichert, 1939
Raymondarges Phleger, 1937
Raymondella Reed, 1935
Raymondinidae
Reaganaspis Stitt, 1977
Realaspis Lotze, 1958
Reckur Münster, 1842
Recticytherura Fei, 2001
Rectifrontinella Drygant & Konstantynenko, 2001
Rectospinacia Schornikov & Michailova, 1990
Redlichaspis Kobayashi, 1935
Redlichiidae
Redlichinidae
Reedaspis Prantl & Pribyl, 1949
Reedocalymene Kobayashi, 1951
Reedolithus Bancroft, 1929
Reedus Dalmatov, 1975
Regina Egorova, 1967
Regius Egorova, 1970
Rehbachiella Müller, 1983
Reillopleura Cooper, Jago & Begg, 1996
Rejkocephalus Kordule, 1990
Relsagnostus Hinz-Schallreuter & Buchholz, 2004
Remacutanger Pribyl & Vanek, 1978
Remipedia Yager, 1981
Remizites Ivshin & Ergaliev, 1983
Remopleurella Dean, 1963
Remopleuridae
Remopleurididae Hawle & Corda, 1847
Remopleuridioides Harrington & Leanza, 1957
Rencunia Zhang & Yuan, 1995
Renhuaia Yin, 1978
Renniella Cooper, 1982
Repinaella Geyer, 1996
Resimopis
Resimopsis Repina, 1958
Resseria Howell, 1945
Resseropsis Hupé, 1960
Retamaspis Hammann, 1972
Reticuloharpes Vanek, 1963
Reticuloquadracythere Monostori, 1998
Retifacies Hou, Chen & Lu, 1989
Retiprimites Meidla, 1996
Retusites Rafinesque, 1832
Reubenella Lochman, 1966
Reuscholithus Bancroft, 1929
Reussia M'Coy, 1854
Reussiana Snajdr, 1987
Reversabella Coryell & Johnson, 1939
Reynella David, 1929
Rhachura Scudder, 1878
Rhacodes Koch, 1856
Rhadinopleura Harrington & Leanza, 1957
Rhadinoscytalis Attems, 1926
Rhaetia White, 1847
Rhamphopyge Kobayashi, 1955
Rheicops Basse, 1998
Rhenopteridae
Rhetia Desmarest, 1825
Rhinaspis Remelé, 1885
Rhinediaptomus Kiefer, 1936
Rhinophacops Kaneko, 1990
Rhinoreedops Maksimova, 1978
Rhodinosoma Attems
Rhodomus Cook, 1896
Rhodonaspis Whitehouse, 1939
Rhodope Angelin, 1854
Rhodotypiscus Öpik, 1979
Rhombampyx Fortey, 1975
Rhombicalvaria Hou, 1987
Rhombicypridea Hou, 2002
Rhomboentomzoe Pribyl, 1950
Rhombograpta Novozhilov, 1954
Rhypophilus Schoedler, 1863
Rhyssometopidae Oepik, 1967
Rhyssometropus
Ribautiella Brölemann, 1926
Ribeirella Schubert & Waagen, 1903
Richardsonaspis Kuo & Duan, 1982
Richardsonellidae
Richardsoniaspis Ivshin, 1958
Richterarges Phleger, 1936
Richteraspis Alberti, 1969
Richterops Hupé, 1953
Rificythere Andreau, 1996
Rimouskia Resser, 1938
Rina Poletaeva, 1964
Rinconaspis Baldis & Gonzalez, 1981
Rinconia Hupé, 1953
Rinella Poletaeva & Egorova, 1969
Riocypris Klie, 1935
Riojaia Liñán, 1978
Ritella
Riudillo Verhoeff, 1937
Robergiella Whittington, 1959
Robroyia Lamont, 1975
Rochaeva Hupé, 1960
Rochdalia Woodward, 1913
Roddyia Resser, 1930
Rogeritina Herrig, 2004
Rogersvillia Hupé, 1955
Rogopus Budde-Lunde, 1908
Rohdendorfium Novozhilov, 1955
Roksaspis Ludvigsen, Westrop & Kindle, 1989
Rokycania Pribyl & Vanek, 1965
Rolfeiidae
Rollmops McNamara, 1980
Romaniella Eldredge & Branisa, 1979
Romanops Eldredge & Branisa, 1980
Roncellia Lesperance & Bourque, 1971
Rondocephalus Pokrovskaya, 1959
Rongxiella Chang, 1974
Rontrippia Thomas & Holloway, 1988
Rorringtonia Whittard, 1966
Rorringtoniidae Owens, 1990
Rosehillia Engel & Morris, 1997
Rosovaspis Courtessole & Pillet, 1976
Rossaspis Harrington, 1957
Rossoestheria Novozhilov, 1954
Rostratella Dybowski, 1926
Rostrifinis Öpik, 1967
Rostrocaris Kinnear, 1887
Rostroleaia Novozhilov, 1952
Rotungus Collinge, 1916
Rowia Deiss, 1939
Ruapyge Wright, 1979
Rudagnostus Lermontova, 1951
Rugocaris Tintori, Bigi, Crugnola & Danini, 1986
Rugulites Tomczykowa, 1991
Ruichengaspis Zhang & Yuan, 1980
Ruichengella Zhang & Yuan, 1980
Runnania Lee, 1978
Rusichnites Dawson, 1861
Ruzickaia Pribyl, 1951
Ryckholtia Snajdr, 1980
Sabeekacythere Bassiouni, 2002
Saccalatia Kay, 1940
Saccogulus Dunlop, Fayers, Hass & Kerp, 2006
Sacculus Neviani, 1930
Sachaspis Egorova, 1969
Sacocaris Salter, 1868
Sacochlis Rafinesque, 1815
Sagavia Koroleva, 1967
Sagitaspis Ivshin, 1983
Sagitoides Ivshin, 1983
Sagittapeltis In-Suk, 1997
Saharops Morzadec, 2001
Sailoma Schrank, 1975
Sailycaspis Repina, 1965
Saimachia Kobayashi, 1937
Saimixiella Lee, 1978
Sairocarididae
Sajanaspis Repina, 1960
Sakkyryia Schallreuter & Hinz-Schallreuter, 2002
Salankanaspis Egorova, 1970
Saltaspis Harrington & Leanza, 1952
Salteria Thomson, 1864
Salterocoryphe Hammann, 1977
Salterolithus Bancroft, 1929
Sambremeusapis Lesperance, 1987
Sanaschtykgolia Poletaeva, 1960
Sanashtycgolia Poletaeva, 1959
Sanashtykgolia
Sanbernardaspis Acenolaza, 1973
Sandoveria Shergold, 1969
Sandtneria Fritsch, 1899
Sanduhedinaspis Yin, 1978
Sanduspis Chien, 1961
Sanfilippiella Brian, 1952
Sangzhiscutellum Lin, 1987
Sanhuangshania Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Sanidopyge Haas, 1968
Sannazaria Costa, 1840
Sansabelloides Harris & Lalicker, 1934
Sanwania Yuan, 1980
Saonella Rozova, 1968
Saoria Lamont, 1978
Saouraspis Thoral
Sapenion
Saperion Hou Xianguang, Ramskold & Bergstrom, 1991
Sapushania Chang, 1966
Sarassina Romanenko, 1980
Sarcolena Ranzani, 1820
Sardoredlichia Rasetti, 1972
Sarkia Koucek, 1919
Sarrabesia Hammann & Leone, 1997
Satpaevella Ivshin, 1965
Saucrolus Marchesini Santos, 1971
Saudileberis Luger, 1999
Saukiandidae
Saukiandops Hupé, 1953
Saukiidae Ulrich & Resser, 1930
Saukioides Kobayashi, 1952
Sayanella Pokrovskaya, 1959
Scaberina Bradfield, 1935
Scabrella Wenndorf, 1990
Scabriscuttelum
Scalicerus Koch, 1844
Scamballa White, 1847
Scanagnostus Buchholz, 1997
Scapheus Woodward, 1863
Sceptaspis Ludvigsen & Chatterton, 1982
Schaderthalaspis Alberti, 1983
Schaderthalis Hundt, 1931
Schamanocaris Tchernyshev, 1945
Scharyiidae
Schaubiana Bassiouni & Luger, 1996
Schendylota Chamberlin, 1950
Schendylotyn Chamberlin, 1926
Schismadillidium Verhoeff, 1901
Schismagnostus Robison, 1994
Schistocoxitus Attems, 1927
Schizodiscus Hall & Clarke, 1888
Schizophillipsia Kobayashi & Hamada, 1980
Schizophorus Balashova, 1953
Schizoproetina Maksimova, 1977
Schizoproetoides Ormiston, 1967
Schizoproetus Richter, 1912
Schizotelopoditius Verhoeff, 1934
Schmidtaspis Kobayashi, 1944
Schmidtia Moberg, 1899
Schmidtops Roomusoks, 1998
Schoeningibba Schallreuter, 1998
Schoharia Lesperance, 1975
Schoriecare Rozova, 1964
Schoriella Sivov, 1955
Schoriina Fedyanina, 1971
Schramixerxes Starobogatov, 1988
Schyilaspis Ivshin, 1983
Scintilla Pegel, 1986
Scleromysis Krøyer, 1859
Scnipaeus Bergsöe & Meinert, 1866
Scolopendrides Saussure, 1869
Scolosaukia Sun, 1990
Scopelochasmops McNamara, 1980
Scorpionura Thompson, 1856
Scorpiura Agassiz, 1846
Scotoproetus Lamont, 1978
Sculdidae
Sculptaspis Nikolaisen, 1982
Sculptella Nikolaisen, 1982
Scutelluidae
Sdzuyella Khairullina, 1975
Sdzuyomia Lieberman, 2001
Secola Schallreuter, 1995
Sectigena Geyer, 1990
Seebachia Wüst, 1903
Segmentagnostus Pek, 1977
Seisonia Kobayashi, 1934
Sekwiaspis Fritz, 1972
Seleneceme Clark, 1924
Selenocoryphe
Selenopeltidae
Selenopleura Angelin, 1868
Selenoptychus Hawle & Corda, 1847
Selenosema Hawle & Corda, 1847
Selenosoma Zittel, 1885
Selerochilus Norman, 1905
Seletella Ivshin, 1955
Seletoides Ivshin, 1962
Selista Rafinesque, 1820
Semagnostus Nielsen, 1997
Sematiscus Öpik, 1975
Semicyclocephalus Ivshin, 1952
Semisphaerocephalus Ivshin, 1952
Semnocephalus Resser, 1942
Senescella Stewart & Hendrix, 1945
Senticucullus Xia
Septacandona Cabral & Colin, 2002
Septidenta Maksimova, 1975
Septimopeltis Pribyl & Vanek, 1972
Serksia Hupé, 1960
Serksioides Hupé, 1960
Serracaris Briggs, 1978
Sestertius Bate, 1888
Sestoniscus Budde-Lund, 1909
Setogammarus Bazikalova, 1945
Severina Egorova & Savitsky, 1969
Shaanxia Zhang & Lin, 1980
Shabaella Qian & Sun, 1977
Shacheella Jiang, 1995
Shahaspis Jell & Hughes, 1997
Shakhribollia Melnikova & Michailova, 1999
Shanchengziella Lu & Qian, 1983
Shanganella Pokrovskaya, 1959
Shanghaia Xu & Ju, 1987
Shanghaiaspis Xu & Ju, 1987
Shangsiaspis Lee, 1978
Shangtungia Walcott, 1905
Shantungaspis Chang, 1957
Shanxiella Lin & Wu, 1980
Shatania Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Shenjiawania Peng, 1984
Shergoldia Zhang Wentang & Jell, 1987
Shergoldina Feist, 2000
Shickshockia Rasetti, 1946
Shifangia Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Shihuigonia Chu, 1960
Shihuigouia Chu, 1960
Shilengshuia Zhou & Yin, 1978
Shipaiella Zhang & Qian, 1980
Shiqiantania Zhou, 1995
Shiqihepsis Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Shirakiellidae
Shitaia Qian & Zhang, 1983
Shivelicus Pokrovskaya, 1959
Shizhudiscus Zhang & Zhu, 1980
Shuiyuella Zhang & Yuan, 1980
Shuizuia Lu & Zhou, 1990
Shumardella Pribyl & Vanek, 1980
Shumardiidae Lake, 1907
Shumardops Hupé, 1955
Shurebus White, 1847
Siberioleaia Novozhilov, 1954
Siberoproetus Pribyl, 1970
Sibibius Chamberlin, 1912
Sibiriaspis Repina, 1960
Sibiriopeltis Petrunina, 1984
Sibiriopleura
Sichuanolenus Zhang & Zhu, 1980
Siciliproetus Kobayashi & Hamada, 1980
Sidaravicienea Schallreuter, 1998
Sidneyiidae
Siemienkiewicziella Dybowski, 1926
Sigmakainella Shergold, 1971
Signatops Pribyl & Vanek, 1971
Silesiops Chlupac, 1966
Siligirites Pokrovskaya, 1972
Silurella Bory de St. Vincent, 1826
Simaproetus Snajdr, 1980
Simoleptus Chamberlin, 1941
Simoporus Chamberlin & Mulaik, 1940
Simulatus Hoare, 2004
Sinaglaspidae
Sinampyxina Sheng, 1974
Singlaspis Hong & Niu, 1981
Sinijanella Repina, 1965
Sinobole
Sinoburius Hou Xianguang, Ramskold & Bergstrom, 1991
Sinocoosella Yuan & Yin, 1998
Sinocrepicephalus Zhang Jinlin & Wang Shaoxin, 1984
Sinocybele Sheng, 1974
Sinocyrtoproetus Yuan & Xiang, 1998
Sinoharpes Sheng, 1974
Sinolenus Kobayashi, 1944
Sinoluia Li, 1987
Sinomegalaspis Qu, 1982
Sinopagetia Zhang & Yuan, 1981
Sinopaladin Li & Yuan, 1994
Sinoparapilekia Peng, 1990
Sinoproceratopyge Lu & Lin, 1980
Sinoptychoparia Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Sinosaukia Sun, 1935
Sinosymbole Yuan & Xiang, 1998
Sinskolutella Melnikova, 1998
Sinuocythere Colin, Cubral, Depeche & Mette, 2000
Siphalus Rafinesque, 1814
Siphlocandona Brady, 1910
Siphonicella Darwin, 1851
Siphonophanes Simon, 1886
Sisgocaris Clarke, 1882
Sititius Chamberlin, 1912
Siveterella Kornicker & Sohn, 2000
Sivovella Poletaeva, 1967
Skalka Schallreuter, Kruta & Marek, 1996
Skaraidae
Skelipyx Lane, 1971
Skemmatocare Richter, 1927
Skemmatopyge Richter, 1919
Skioldia Hou & Bergstrom, 1997
Skironitella Hahn, Hahn & Müller, 2003
Slabberia Beneden, 1861
Slabberina Beneden, 1861
Slimanella Pribyl & Vanek, 1978
Slimoniidae
Smeathenia Dean, 1960
Smerdis Leach, 1816
Smerdus Berthold, 1827
Smithixerxes Schram & Rolfe, 1982
Snajdria Hammann, 1992
Sneedvillia Resser, 1938
Snoderaspis Ramsköld, 1984
Sobovaspis Dean, 1973
Sohopleura Jago & Webers, 1992
Sokhretia Hupé, 1956
Sokoliops Bursky, 1970
Sokratesiella Dybowski, 1926
Solaenophyllum Verhoeff, 1910
Solariproetus Qu, 1986
Solenagnostus Whitehouse, 1936
Solenocaris Meek, 1871
Solenoparina Chang, 1963
Solenoparops Chang, 1963
Solenopleuridae
Solontzella Repina, 1959
Solozona Becker & Blumenstengel, 1997
Somalileberis Luger, 1999
Somatrikelon McMurtrie, 1819
Songkania Chang, 1974
Songtaoia Yin, 1978
Soniphilus Chamberlin, 1912
Sonoraspis Stoyanow, 1952
Sonoromeris Silvestri, 1929
Sophone Risso, 1826
Sorrentosphaera Verhoeff, 1944
Sottyxerxes Schram & Rolfe, 1982
Sottyxerxidae
Soudanocytheridea Bio-Lokoto, Carbonnel, de Klasz, de Klasz, Lang & Salard-Cheboldaeff, 1998
Sowinskiella Dybowski, 1926
Sowubius Chamberlin, 1912
Spathacalymene Tillman, 1960
Spathiocaris Clarke, 1882
Spatiatoridae
Spatulina Osmólska, 1962
Spelaeogervaisia Brölemann, 1914
Spencebatea Norman, 1879
Sperchius Rafinesque, 1820
Spergenaspis Brezinski, 1987
Sperginaspis
Sphaeragnostidae
Sphaerapoeia Collingwood, 1868
Sphaerestheria Novozhilov, 1954
Sphaerherpestidae
Sphaerocare Harrington & Leanza, 1957
Sphaeronectes Woltereck, 1903
Sphaerophthalmella Kobayashi, 1955
Spheroma Risso, 1816
Sphoeroma Rafinesque, 1815
Spiloniscus Racovitza, 1908
Spinacephalus Stitt, 1970
Spinagnostidae
Spinagnostiidae
Spineuloma Lu & Lin, 1984
Spinibole Chlupac, 1966
Spinicryphops Cronier & Feist, 2000
Spinifer Krøyer, 1842
Spinillaenus Xia, 1978
Spinimetopus Hahn & Hahn, 1985
Spinodiphores Schallreuter, 1996
Spinodiscus Kobayashi, 1943
Spinodontochile Snajdr, 1985
Spinolimbella Liu, 1982
Spinopanura Kushan, 1973
Spinoproetus Snajdr, 1977
Spinoredlichia Liu, 1975
Spinososioella Kozur, 1994
Spinospitella
Spinovina Coryell & Malkin, 1936
Spirantyx Whittard, 1961
Spitella Shah, Parcha & Raina, 1991
Spitiaspis Kobayashi, 1967
Spitsbergaspis Pribyl & Vanek, 1980
Squama Logan, 1897
Squarrosoella Wu & Lin, 1980
Squillerichthus H. Milne Edwards, 1837
Squillites Scott, 1938
Squillitidae
Stagma Meyer, 1865
Stalagmus Nordmann, 1864
Staurocephalidae
Staurogmus Hawle & Corda, 1847
Stauroholcus Resser, 1939
Steedenia Hahn, Hahn & Müller, 2003
Stegnopsis Whittington, 1965
Stelckaspis Chatterton & Perry, 1983
Stella Egorova & Savitsky, 1968
Stenocheles Fritsch, 1887
Stenochelus Reuss, 1858
Stenocuma Sars, 1900
Stenodiaptomus Kiefer, 1932
Stenorhachis Hintze & Jaanusson, 1956
Stenyo Rafinesque, 1814
Stenyolus Rafinesque, 1815
Stephenaspis Rasetti, 1951
Stereodesmus Cook, 1896
Sternarthronidae
Sthenometopa Norman, 1902
Stigmacephaloides Ellinwood, 1962
Stigmametopus Rasetti, 1944
Stigmaspis Nelson, 1951
Stiktocybele Ingham & Tripp, 1991
Stimpsonia Bate & Westwood, 1862
Stittaspis Loch & Taylor, 2004
Stoecklinia Wolfart, 1974
Stoermeraspis Prantl & Pribyl, 1947
Stoermeria Prantl & Pribyl, 1947
Stoppex Schallreuter & Hinz-Schallreuter, 1999
Stramentidae
Strandiolus Hoffer, 1937
Strenax Öpik, 1975
Streptocephalellus Daday, 1910
Streptocephalopsis Daday, 1910
Strictagnostus Shergold, 1975
Strigocaris Vogdes, 1889
Striticephala
Strongylosmides Attems, 1901
Strotactinus Bradley, 1925
Strotocephalus Resser, 1935
Strototropis Raymond, 1937
Strouhalius Verhoeff, 1940
Struveapis
Struveaspis Alberti, 1966
Struveops Cronier & Feist, 2000
Struveproetus Feist, Lemke & Korn, 2000
Struveria Rickards, 1965
Stummiana Lieberman & Kloc, 1997
Styginella Pribyl & Vanek, 1972
Styginidae Vogdes, 1890
Stygodytes Absolon, 1913
Stygoligidium Borutzki, 1950
Styluroxiphias Costa, 1864
Stypacephalus
Subasellus Karaman, 1952
Subcaligus Heegaard, 1943
Subeia Li, 1982
Subeuscalpellum Joleaud, 1914
Subitella Repina, 1980
Subpseudoscalpellum Joleaud, 1914
Suchonella Spizharsky, 1937
Suevoclytia Kuhn, 1939
Sujaraspis Romanenko, 1967
Sukhanaspis Lazarenko, 1968
Sulcacratia Becker & Blumenstengel, 1995
Sulcatagnostus Kobayashi, 1937
Sulcocalymene Baldis & Pothe, 1995
Sulcraphiolus Schallreuter & Hinz-Schallreuter, 1999
Sulcubole Groning, 1985
Suluktella Khairullina, 1975
Sunaspidella Zhang & Yuan, 1981
Sunaspis Lu, 1953
Sundameris Verhoeff, 1936
Sunia Kobayashi, 1942
Sunina Strand, 1943
Sunwaptia Westrop, 1986
Surachia Pokrovskaya, 1965
Suriaspis Acenolaza & Rabano, 1990
Suturikephalion Kobayashi & Hamada, 1982
Suturodes Chamberlin, 1922
Suyougouia Lin & Zhang, 1979
Svalbardites Fortey, 1974
Svenax Öpik, 1979
Svobodapeltis Snajdr, 1957
Swainella Kornicker & Sohn, 2000
Syannigina Korobeinikova, 1974
Sycophantia Fortey, 1980
Syllarus Rafinesque, 1815
Sylvesterella Kornicker & Sohn, 2000
Symmetroleaia Novozhilov, 1952
Symnistra Philippi, 1887
Symphyla
Symphylellina Brölemann, 1931
Symphyroxochus Rosova, 1985
Symphysops Raymond, 1925
Symphysurinella Raymond, 1937
Symphysuroides Raymond, 1937
Sympronce Stebbing, 1888
Syngastron Costa, 1883
Synopolys Chamberlin, 1931
Synphoria Delo, 1935
Synphoriidae
Syntomagaster Costa, 1882
Syriobrachyiulus Verhoeff, 1930
Syrrhaptis Luo & Hu, 1999
Syspacheilus Resser, 1938
Szeaspis Chang, 1959
Szechuanaspis Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Szechuanolenus Chang & Chu, 1978
Tabalqueia Rusconi, 1958
Tabatopygellina Sivov, 1955
Tabiphilus Chamberlin, 1912
Tachypododiulus Verhoeff, 1893
Tadakoustia Geyer, 1990
Tadjikia Khairullina, 1973
Taenicephalina Rasetti, 1945
Taenicephalites Rasetti, 1961
Taenicephalops Ergaliev, 1980
Tafilaltaspis Alberti, 1966
Tafnaspis Leanza & Baldis, 1975
Tagazella Romanenko, 1972
Tagenarella Lazarenko, 1968
Tageneraspis
Tagra Hinz-Schallreuter, 1993
Taianocephalus Sun, 1925
Taidonorus
Taidonurus Petrunina, 1984
Taiganella Repina, 1960
Taihangshania Zhang & Wang, 1985
Taihangshaniashania Jell, 2003
Taihungshaniidae
Taijiangocephalus Yuan & Zhao, 2001
Taimyraspis Balashova, 1959
Taipaikia Kobayashi, 1960
Taishania Sun, 1935
Taitzehoia Chu, 1959
Taitzuina Zhang & Yuan, 1981
Taklamakania Zhang, 1979
Talacastops Edgecombe, Vaccari & Waisfeld, 1994
Talaeomarrolithus
Talbotinella Poulsen, 1960
Talifa Budde-Lund, 1908
Talimuina Jiang & Zhou, 1995
Talitrella Dybowski, 1926
Talitrorchestia Brandt, 1851
Talus Haas, 1968
Tamaranella Rozova, 1963
Tambakia Kobayashi & Hamada, 1971
Tamdaspis Lisogor, 1977
Tangbailaspis Hsiang & Zhang
Tangenarella
Tangjiaella Qiu, 1984
Tangopleurus Verhoeff, 1941
Tangshanaspis Zhou Zhiyi & Zhang Jinlin, 1978
Tangshihella Hupé, 1955
Tangshihlingia Chu, 1959
Tangwangzhaia Zhang & Peng, 1998
Tangyaia
Taniaspidella Semashko, 1971
Tankhella Chernysheva, 1961
Tannuolaspis Zadorozhnaya, 1967
Tanybregma Jell & Stait, 1985
Taoyuania Liu, 1977
Taplimella
Tarayagnostus Suarez-Soruco, 1975
Tarijaetinoides
Tarimella
Tarricoia Hammann, Laske & Pillola, 1990
Tarsotyle Attems
Tarynaspis Repina, 1965
Tasagnostus Jago, 1976
Tasmanaspis Kobayashi, 1940
Tatanspis
Tatonaspis Kobayashi, 1935
Tatulaspis Ivshin, 1956
Taubachia Zeissler, 1977
Tauria Dana, 1852
Tavsenia Robison, 1988
Taxartus Novozhilov, 1954
Taxioura Resser, 1939
Taxotina Lazarenko, 1966
Tayanaella
Taynaella Spassky, 1989
Tazemmourtia Hupé, 1960
Tazzemmourtia
Tchaiaspis Korobov, 1966
Tcherkesovia Spassky, 1989
Tchernyshvioides
Tchukeraspis Rosova, 1985
Tchuostachia Khramova, 1973
Technophorus Branson, 1909
Tegopelte Simonetta & Della Cave, 1975
Teichertops Struve, 1992
Teichocheilina Swartz, 1949
Teiskotella Colin, Tambareau & Krasheninnikov, 1998
Tekinia
Telaemarrolithus Williams, 1948
Teleotelson Verhoeff, 1936
Telephinidae
Telephops Nikolaisen, 1963
Telesiops Rafinesque, 1832
Telesto Rafinesque, 1814
Teliops Rafinesque, 1818
Teljanzella Repina, 1973
Telobothropolys Verhoeff, 1907
Telopoclitius Verhoeff, 1931
Temmysa Schallreuter, 2000
Temnura Resser & Endo, 1935
Temnurus Resser & Endo, 1935
Tengfengia Hsiang, 1962
Tengfengiidae
Tentagnostus Sun Xiaowen, 1989
Tenuipeltis Lütke, 1965
Tepidiora Jellinek, 1996
Terassobeyrichia Schallreuter, 2000
Terechtaspis Repina, 1960
Termieraspis Repina, 1960
Terquemia van Veen, 1932
Terranovia Maksimova, 1977
Tersella Petrunina, 1973
Tersiceps Repina, 1964
Tesselacaudella Balashova, 1967
Tetinia Chlupac, 1971
Tetraceroura Chang, 1963
Tetrachelidae
Tetracnemis Hawle & Corda, 1847
Tetraconosoma Verhoeff, 1924
Tetracornella Zaspelova, 1952
Tetraelasma Agassiz, 1846
Tetragonocephalus Repina, 1965
Tetralasmis Cuvier, 1830
Tetralichas Weber, 1951
Tetrapsellium Hawle & Corda, 1847
Tetrasarsiella Kornicker, 1995
Tetrathrosoma Verhoeff, 1898
Tetronychia Stephensen, 1924
Tetropus Jarocki, 1825
Tewonia Zhou, 1982
Thaiaspella Kobayashi & Hamada, 1978
Thaiaspis Kobayashi, 1961
Thailandium Kobayashi, 1957
Thalabaria Engel & Morris, 1989
Thalasina Leach, 1813-14
Thaliella Gray, 1848
Thallulus Kowalski, 1983
Thaminocypris Zalányi, 1944
Theamataspis Öpik, 1937
Thebanaspis Lütke, 1990
Thelecalymene Whittington, 1971
Theodensia
Thereuopriona Verhoeff, 1936
Theriosynoecium Branson, 1936
Thetis Goodsir, 1842
Thielaspis Singleton, 1954
Thiella Rafinesque, 1815
Thigriffithides Hessler, 1965
Thingathinga Edgecombe, 2001
Tholaraspis Hupé, 1953
Tholifrons Palmer, 1968
Tholus Pegel, 1986
Thomondia Harper, 1942
Thomsenia Panning, 1924
Thomsonaspis Deiss, 1939
Thoracocare Robison & Campbell, 1974
Thoralocoleus
Thoralocolus Pillet & Courtessole, 1985
Thorslundops Pribyl & Vanek, 1981
Thulicola
Thulincola Tripp, 1962
Thuringaspis Struve, 1962
Thylacocephalus Lange, Hof, Schram & Steeman, 2001
Thylacurus Lichtenstein, 1819
Thylakiophilus Verhoeff, 1934
Thymurus Whittard, 1966
Thyrabis Sars, 1903
Thyranopus Van der Hoeven, 1850
Thysanopeltella Kobayashi, 1957
Thysanopeltidae
Thysanopyge Kayser, 1898
Tianjingshania Zhou, 1982
Tianshanocephalus Zhang, 1981
Tibagya Struve, 1958
Tibikephalus Pillet, 1992
Tickalaracythere Krommelbein, 1975
Tienshihfuia Lu, 1976
Tienzhuia Chu, 1960
Tilsleya Hahn & Hahn, 1996
Timiobius Chamberlin, 1922
Timnaella Parnes, 1971
Tingocephalus Sun, 1935
Tingyuania Sun & Chang, 1937
Tior Schallreuter, 1999
Tiresias M'Coy, 1846
Titanosphaera Verhoeff, 1933
Tjungiella Khramova, 1980
Tobatopyge Sivov, 1955
Toernquistia Reed, 1896
Toernquistiidae Hupé, 1953
Toernquistina Rosov, 1985
Tolanaspis Ivshin, 1952
Tolbinella Yegorova, 1983
Toletanaspis Rabano, 1989
Tolkienia Lieberman & Kloc, 1997
Tollaspellus Ivshin, 1953
Tolstotchichaspis Rozova, 1960
Tomiulus Martynov, 1936
Tomoligus Rafinesque, 1832
Tomorhachis Resser, 1938
Tomotaenia Cook, 1895
Tongbaiella Shu & Zhang, 2000
Tongxinaspis Zhou, 1981
Tongxingaspis
Tonopahella Sundberg & McCollum, 2003
Tontoia Walcott, 1912
Topviella Melnikova, 2000
Torgalykia Novozhilov, 1955
Torgaschina Repina, 1979
Torifera Wolfart, 1974
Tormesiscus Waisfeld, Edgecombe & Vaccari, 1994
Torosus Fedyanina, 1962
Torridella Lochman & Hu, 1962
Tosacephalus Kobayashi & Hamada, 1974
Tosotychia Öpik, 1961
Townleyella Öpik, 1967
Toxochasmops McNamara, 1979
Toxophacops Zhou Zhiquiang & Campbell, 1990
Toxotina Romanenko, 1967
Toxotis Wallerius, 1895
Trabzonella Tunoglu, 2002
Trachoparia Chang, 1963
Trachycheilus Resser, 1945
Trachylichas Gürich, 1901
Trachyostracus Lorenz, 1906
Trachypeneopsis Burkenroad, 1934
Tramoria Reed, 1899
Trapelocera Hawle & Corda, 1847
Trapezilites Hinz-Schallreuter, 1993
Trapezocephalalina
Trapezocephalina Repina, 1964
Trautensteinproetus Pillet, 1969
Trematophorus Balashova, 1953
Triadaspis Öpik, 1967
Triangullina
Triarthrella Hall, 1863
Triarthroides Raymond, 1937
Triasocaris Bill, 1914
Triassomanawa Kozur, 1998
Triassopuncia Kozur, 1998
Tribius Chamberlin, 1943
Tribola Dana, 1852
Trichelaspis Stebbing, 1894
Trichiulus Scudder, 1884
Trichocryptops Verhoeff, 1937
Trichocyzicus Daday, 1914-, 1915
Trichopachiulus Verhoeff, 1910
Trichyurus Costa, 1865
Tricopelta Ludvigsen & Chatterton, 1982
Tricornotarion Chatterton, 1971
Tricrepicephalidae
Tricuspidella Czerniavskii, 1878
Trifonella Romanenko, 1967
Trigoides Luo & Hu, 1999
Trigonaspis Yang, 1991
Trigonaspis Sandberger, 1849
Trigoncekovia Xia, 1978
Trigonestheria Novozhilov, 1954
Trigonlimnadia Novozhilov, 1954
Trigonoaspis Koroleva, 1961
Trigonochirus
Trigonoproetus Apollonov, 1974
Trigonorossiaia Novozhilov, 1954
Trigonyangaspis Jell, 2003
Trigrypos Kobayashi, 1940
Trilagnostus Shah, Parcha & Raina, 1995
Trileaia Kobayashi, 1954
Trilepas van der Hoeven, 1833
Trilobalis Rafinesque, 1836
Trilobella Ivanova, 1955
Trilobites Link, 1807
Trilobocaris Pribyl, 1953
Trilobus Brünnich, 1781
Trimerocephalus M'Coy, 1849
Trimerolichas Phleger, 1936
Trinepea Palmer & Gatehouse, 1972
Trinia Poletaeva, 1956
Trinucleidae Hawle & Corda, 1847
Trinucleina Gilbert-Tomlinson, 1961
Tripaulites Delo, 1935
Triplacephalus Lu & Chien, 1978
Triporobius Silvestri, 1917
Trippia Lamont, 1978
Tririmagnostus Qiu, 1983
Trisulcagnostus Ergaliev, 1980
Triura Tellkampf, 1844
Trochderma Gistl, 1848
Trochiscia Ehrenberg, 1834
Troedssonia Poletaeva, 1960
Trogleluma Vandel, 1945
Trophoniphila McIntosh, 1885
Tropiconiproetus Snajdr, 1980
Tropicoryphe Snajdr, 1977
Tropidaulus Fenton, 1937
Tropidocare Chlupac, 1971
Tropidocoryphidae Pribyl, 1946
Tropidopyge Harrington & Kay, 1951
Tropiter Gould, 1857
Truncatometopus Pillet, 1960
Truncofabanella Swain, 1993
Truyolsella Sánchez de Posada & Bless, 1999
Trymataspis Robison, 1964
Trypostrephon Cook, 1896
Tsaidamaspis Chang & Fan, 1960
Tschernyschewiella Toll, 1899
Tsinaniidae Kobayashi, 1933
Tsunyidiscidae
Tsunyilichas Chang, 1974
Tsunylichas
Tuberaspis
Tuberculocarcinus Lorenthey & Buerlen, 1929
Tubicinelligenus Renier, 1807
Tubiferum White, 1844
Tubilibairdia Swartz, 1936
Tubuterium Melnikova, 2000
Tugurellum Sun, 1990
Tukalandaspis Lazarenko, 1968
Tulipa Schreibers, 1793
Tumidulaspis Romanenko, 1967
Tumulina Repina, 1959
Tungtzuella
Tungusella Repina, 1960
Tunilus Chamberlin, 1941
Turantyx Pribyl & Vanek, 1985
Turcopyge Richter & Richter, 1939
Turgicephalus Fortey, 1980
Turkestanella Repina, 1975
Turkoniscus Verhoeff, 1943
Tuvanella Pokrovskaya, 1959
Tuvinia Poletaeva, 1959
Tuyunaspis
Tuzoia Walcott, 1912
Tygarrupius Verhoeff, 1939
Tylotaitzuia Chang, 1963
Tylotaspis Zhang, 1983
Tympanuella Sundbe, 1994
Typhlocalanus Sars, 1902
Typhloiscus
Typhlokorynetes Shaw, 1966
Typhloniscus Salter, 1856
Typhlopachyiulus Verhoeff, 1898
Typhloproetus Richter, 1913
Typhlosphaeroma Racovitza, 1910
Tyrannophontidae
Tyronia Rafinesque, 1814
Tzuchiatocnemis Sheng, 1974
Udorellidae
Uiguria Jiang & Lin, 1995
Uktaspis Korobov, 1963
Ukukites Pokrovskaya, 1961
Ulakhanella Repina, 1974
Ulania Lin & Zhang, 1979
Ulankanella
Ullaspis Westergard, 1948
Ulodesmellus Verhoeff, 1940
Ulrichaspis Rasetti, 1945
Ulricholithus Bancroft, 1933
Ulrickaspis
Ulugtella Petrunina, 1975
Ulwellia Anderson, 1939
Uncinidae
Unguliproetus Erben, 1951
Unguloharpes Pribyl & Vanek, 1981
Unicapeltis Maksimova, 1977
Unnabeyrichia Schallreuter, 1995
Uotschatina Schallreuter & Hinz-Schallreuter, 2002
Upplandiops Jaanusson & Ramskold, 1993
Uralops Antsygin, 1970
Uraloscutellum Ancigin & Maximova, 1978
Urbanaspis Ivshin, 1953
Urdidae
Uriarra Chatterton & Campbell, 1980
Uripes Thomas & Holloway, 1988
Urjungaspis Egorova & Savitsky, 1968
Urocteidae
Urokodia Hou, Chen & Lu, 1989
Uromystrum Whittington, 1953
Urozoea Ortmann, 1893
Ursinella Eddy & McCollum, 1998
Ursinopereiopus Dybowski, 1926
Urumqiella Jiang, 1995
Usoviana Poletaeva, 1969
Usumunaspis Lazarenko, 1962
Utahcaris Conway Morris & Robison, 1988
Utaspis Robison, 1964
Utia Walcott, 1924
Utoiulus Chamberlin, 1943
Uxunella Romanenko, 1985
Vachonia Lehmann, 1955
Vachonisia Lehmann, 1956
Vacuaspis Balashova, 1967
Vaiguva Sidaravichene, 1992
Valdaites
Valdariops Roomusoks, 2000
Valenagnostus Jago, 1976
Valesiosoma Verhoeff, 1931
Validaspis Repina, 1977
Valongia Pribyl & Vanek, 1984
Valtorresia Shergold & Sdzuy, 1991
Vandergrachtia Brauckmann, 1974
Vanganardia Gramm, 1997
Vania Kruta & Siveter, 1998
Varanella Lochman & Hu, 1962
Variopelta Fritz, 1972
Varvaspis Tjernvik, 1980
Varvia Tjernvik, 1956
Vauntompsonia Bate, 1858
Vega Poletaeva, 1977
Velieuxia Courtessole, 1973
Velocipede Martill & Barker, 1998
Ventriculobolbina Schallreuter, 2000
Veragraulos Fedyanina, 1971
Verditerrina Robison, 1988
Verkholenella Sachuk, 1964
Vermilionites Kobayashi, 1955
Vermontella Howell, 1937
Vernaculina Lochman & Hu, 1961
Verrucolsella Croneis & Gale, 1938
Verrula Leach, 1818
Vertexia Lutkevich, 1941
Viaphaeops Maksimova, 1971
Vica Poletaeva, 1971
Vicinopeltis Pribyl, 1967
Vicinoproetus Alberti, 1967
Vietnamia Kobayashi, 1960
Vinakainella Rusconi, 1952
Vinikainella
Vinneto Budde-Lund, 1906
Virbalina Sidaravichene, 1992
Vireia Alzona, 1903
Vironiaspis Jaanusson & Ramskold, 1993
Viruanaspis Pribyl & Vanek, 1978
Vistoia Walcott, 1925
Vitaella Alberti, 1976
Vitavina Boucek, 1936
Vittaella Alberti, 1976
Vitteplana Sidaravichene, 1992
Vitzjaziana Birshtein & Vinogradov, 1955
Vogesina Wclfart, 1968
Voigtaspls Alberti, 1967
Vokovicia Snajdr, 1987
Volchovites Balashova, 1967
Volgocuma Derzhavin, 1912
Volkops Struve, 1959
Vologdinaspis Il'inykh, 1968
Volonellus Ivshin, 1952
Waergangia Lin, 1991
Wafangdiania Zhang, 1999
Wagnerispina Gandl, 1977
Waideggula Hahn, Hahn & Schneider, 1989
Waigatchella Maksimova, 1970
Waisfeldaspis Vaccari, 2001
Walcottaspidella Chu, 1959
Walcottaspis Ulrich & Resser, 1930
Waldeckella Rabien, 1954
Waldminia Koch & Lemke, 1994
Walencrinuroides Lesperance & Desbiens, 1995
Wallacia
Walossekia Müller, 1983
Wanagnostus Qiu, 1983
Wanbeiaspis Qiu, 1983
Wandelella Robison, 1988
Wangcunia Peng, Lin & Chen, 1995
Wangzishia Sun, 1977
Wanhuaia Yuan & Li, 1999
Wanliangtingia
Wannania Qiu, 1983
Wanshania Rong & Yang
Wansliania Rong & Yang, 1978
Wanwanaspis Kobayashi, 1966
Wanwanoglobus Kobayashi, 1966
Waptiidae
Warburgaspis Pribyl, 1946
Warburgella Balashova, 1968
Warburgella Raymond, 1937
Warendia Gilbert-Tomlinson, 1969
Warnia Schallreuter, 2000
Warniwemuna Schallreuter, 2001
Waterstonellidae
Waylandella Coryell & Billings, 1932
Weberides Reed, 1942
Weberiphillipsia Osmolska, 1970
Wedekindia Sun, 1935
Wedekindiaspis Hsiang, 1965
Wegelinia Pribyl & Vanek, 1981
Weijiaspis Qiu, 1983
Weinberginidae
Weishania Zhu Zhaoling & Wittke, 1989
Wemuna Schallreuter, 1995
Wenganaspis Yin, 1978
Wenganella Yin, 1978
Wengangaspis Yin, 1980
Wenganlenus Yin, 1978
Wenkchemnia Rasetti, 1951
Wentsuia Sun, 1925
Wentusia
Wessekia Vogdes, 1925
Westergaardella Kobayashi, 1962
Westergaardia
Westergardia Raymond, 1924
Westergardites Troedsson, 1937
Westonaspis Rasetti, 1945
Westropia Adrain, 1997
Weyerites Cronier & Feist, 2000
Weymouthiidae
Whipplella Holland, 1934
Whitefieldina Resser, 1937
Whittakerites Ludvigsen, 1976
Whittardolithus Hughes, Ingham & Addison, 1975
Whittingtonella Ludvigsen, Westrop & Kindle, 1989
Wilckensia Schallreuter, 1995
Wilcoxaspis Westrop, 1986
Wilsonarella Ivshin, 1962
Wimanicharion Hinz-Schallreuter, 1993
Winiskia Norford, 1981
Winsteria
Winterbergia Hahn & Brauckmann, 1975
Witryides Hahn, Hahn & Brauckmann, 1986
Wittekindtia Wolfart, 1970
Wllsonella Hu, 1968
Wohliella Dybowski, 1926
Wolayella Erben, Flügel & Walliser, 1962
Wongia Sun, 1925
Woodwardopteridae
Workmanella Croneis & Gale, 1938
Wossekia Raymond, 1916
Wuania Chang, 1963
Wuaniidae
Wuanoides Zhang & Yuan, 1981
Wuchuanella Wu, 1978
Wudangia Lee, 1978
Wuerheella Jiang & Lin, 1995
Wuhaina Zhang & Yuan, 1981
Wuhuia Kobayashi, 1933
Wuhushania Zhang & Yuan, 1981
Wujiajiania Lu & Lin, 1980
Wutaishanaspis Zhang & Wang, 1992
Wutaishania Zhang & Wang, 1985
Wutingshania Chu, 1959
Wuxunaspis Yuan, 1980
Xandarella Hou, Ramskold & Bergstrom, 1991
Xanionurus Whittington & Campbell, 1967
Xenasaphus Jaanusson, 1953
Xenoboloides Brauckmann, 1987
Xenoclea Boeck, 1871
Xenocyclopyge Lu, 1962
Xenodechenella
Xenoredlichia Zhang, 1983
Xerporcellio Strouhal, 1955
Xestagnostus Öpik, 1967
Xestodillo Verhoeff, 1926
Xestoglomeris Verhoeff, 1906
Xialiangshania Chen, 1975
Xianfengia Zhu & Sun, 1977
Xiangqianaspis Zhou, 1980
Xiangshanaspis Lin, 1983
Xiangshania Qiu, 1983
Xiangxiia Liu, 1982
Xiangzhongella Liu, 1987
Xianquianaspis
Xiaodaositunia Nan & Chang, 1982
Xiaofangshangia Qiu, 1980
Xiaomajiella Zhou, 1980
Xiaoshiella Lu & Qian, 1983
Xilingxia Lu, 1980
Xinanocephalus Lee, 1978
Xinfauangaspis Liu, 1982
Xinglongia Zhang & Wang, 1985
Xingrenaspis Yuan & Zhou, 1980
Xingzishania Zhou, 1975
Xinjiangella Jiang, 1995
Xinjiangia Zhang, 1981
Xintaia Zhang, 1983
Xiphisura Brünnich, 1772
Xiphogona Cook & Collins, 1895
Xiphogonium Hawle & Corda, 1847
Xiphus Eydoux & Souleyet, 1842
Xishuiella Yin, 1978
Xiuqiella Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Xiushanopsis Lee, 1978
Xiushuilithus Zhou, 1976
Xiushuiproetus Zhang, 1983
Xixiangella Chen Runye, 1999
Xuanenia Zhou, 1977
Xuigiella
Xuzhouia Qiu, 1980
Xylabion Lane, 1971
Xylaphocaris Bate, 1888
Xyliulus Lacoe, 1883
Xyloiulidae
Xyphotheca Leach, 1819
Xyphurus Rafinesque, 1815
Xystriduridae
Yakutingella Melnikova, 1998
Yangweizhouia Yuan & Yin, 1998
Yangzicaris Shen, 1983
Yanhaoia Zhou Zhiyi, Dean, Yuan Wenwei & Zhou Tianrong, 1998
Yanjiangolithus Yin, 1978
Yankaoia
Yankongia Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Yanquetruzia Rusconi, 1955
Yanshanaspis Luo & Jiang, 1985
Yanshania Zhang & Wang, 1985
Yanshaniashania Jell, 2003
Yanshanopyge Guo & Duan, 1978
Yanzhuangia Zhang & Peng, 1998
Yaojiayuella Lin & Wu, 1980
Yaopuia Kuo & Duan, 1982
Yaosuoleperditia Wang, 1994
Yarakia
Yarmakaspis Lisogor, 1977
Yeshanaspis Zhu & Jiang, 1981
Yichangaspis Xiang & Zhou, 1987
Yiliangella Chang, 1966
Yiliangellina Chang, 1966
Yinaspis Chang, 1960
Yinganaspis Zhang, 1981
Yingziaspis Zhang, 1999
Yinitidae
Yinjiangia Yin, 1978
Yinpanolithus Lu & Chang, 1974
Yinshanaspis Zhang & Zhu, 1979
Yishanaspis Yuan & Xiang, 1998
Yohoaspis Rasetti, 1951
Yokusenia Kobayashi, 1935
Yongwolagnostus Choi, Lee & Sheen, 2004
Yongwolia Kobayashi, 1962
Yosimuraspis Kobayashi, 1960
Yoyarria Rusconi, 1955
Yuehsienszella Chang, 1957
Yuehsieszella
Yuepingia
Yuepingioides Lu & Lin, 1984
Yujinia Zhang & Yuan, 1980
Yuknessaspis Rasetti, 1951
Yukonides Fritz, 1972
Yukoniidae
Yumenaspis Chang, 1960
Yunlingia Qiu, 1983
Yunmengshania Zhang & Wang, 1985
Yunnanaspidella Chang, 1966
Yunnanina Attems, 1936
Yunnanocephalidae
Yupingia Lu, 1956
Yurakia Rozova, 1963
Yushugouia Guo & Duan, 1978
Zacanthellina Repina, 1965
Zacanthoididae Swinnerton, 1915
Zacanthopsina Palmer, 1964
Zacathellina Repina, 1965
Zacompsus Raymond, 1924
Zacoreus Rafinesque, 1815
Zanobius Chamberlin, 1938
Zantethobius Chamberlin, 1911
Zaozhuangaspis Lin, 1984
Zaplaops Baldis & Blasco, 1978
Zavertania Schallreuter & Hinz-Schallreuter, 2004
Zazvorkaspis Pribyl & Vanek, 1964
Zbirovia Snajdr, 1956
Zdicella Snajdr, 1957
Zelitoe Rafinesque, 1815
Zemba White, 1847
Zetaproetus Snajdr, 1983
Zethus Pander, 1830
Zhaishania Qiu, 1983
Zhalangtania Zhou, 1996
Zhanglouia Qiu, 1980
Zhegangula Hahn, Hahn & Yuan, 1989
Zhejiangoproetus Zhang & Ju, 1983
Zhenbadiscus Zhang, 1980
Zhenbaspis Lu Chang, Chien, Chu, Lin, Chou, Chien, Zhang & Wu, 1974
Zhenganites Yin, 1978
Zhenpingaspis Lee, 1978
Zhenxiongaspis Lin & Yin, 1978
Zhifangia Zhang
Zhifangiafangia Jell, 2003
Zhongtiaoshanaspis Zhang & Yuan, 1980
Zhongweia Zhou, 1982
Zhongxinia Luo & Hu, 1997
Zhuangliella Qiu, 1983
Zhuitunia Liu, 1982
Zhujia Ju, 1983
Zhusilengops Zhou Zhiquiang & Campbell, 1990
Zhuxiella Zhang & Zhu, 1980
Ziboaspidella Lu, Zhu & Zhang, 1988
Ziboaspis Chang, 1963
Zigzuella Hupé, 1960
Zlichovaspis Pribyl & Vanek, 1971
Zoe Agassiz, 1846
Zoea Bosc, 1801
Zoeaboops Adams, 1848
Zoeides Guérin, 1857
Zoenus Rafinesque, 1815
Zonoplax Schallreuter, 2001
Zonoscutum Chlupác, 1999
Zoocapsa Seeley, 1870
Zoontocaris Bate, 1888
Zoraspis Nan, 1985
Zuninaspis Harrington & Leanza, 1957
Zuphea Risso, 1826
Zygobolbina Ulrich & Bassler, 1923
Zygosella Ulrich & Bassler, 1923
Zygura Schallreuter, 2001
- Arthropoda