Mollusca
Abbasites Buckman, 1921
Abichia Gemmellaro, 1888
Acanthaecites Rollier, 1909
Acanthoceratidae Grossouvre, 1894
Acanthoclymeniidae
Acanthodrepanites Tozer, 1994
Acantholissonia Leanza, 1972
Acanthoplites Sinzow, 1907
Acanthoptychoceras Manolov, 1962
Acanthoteuthis Wagner, 1839
Acanthothetidites Tatzreiter, 1980
Acanthotropites Tozer, 1994
Acanthuncus Kulicki & Szaniawski, 1972
Acaroceras Chen, Qi & Chen, 1979
Acaroceratidae
Acathuncus Kulicki & Szaniawski, 1972
Accardia Cresta, 1997
Accoluncus Wind, Dinkelman & Wise, 1977
Acerlecanites Waterhouse, 1999
Acleistoceratidae
Aclisoceras Zhuravleva, 1978
Acrimitoceras Ruan, 1995
Acrioceratidae
Acrocanitidae
Acrochordiceratidae Arthaber, 1911
Acrocoelites Lissajous, 1915
Actinoceratidae Saeman
Actinodochmioceras Chen, 1981
Acuaria Quenstedt, 1856
Acuariceras Spath, 1933
Acuarites Schindewolf, 1963
Acutibelus Riegraf, 1981
Acuticostites Semenoff, 1897
Acutobeccus Teichert & Spinosa, 1971
Adabofoloceras Joly, 1977
Adkimsites Spath, 1931
Adnatoceras Flower, 1939
Adnethiceras Wiedmann, 1970
Adrianitidae Schindewolf, 1931
Adygeites Shevyrev, 1995
Aegasteroceras Spath, 1925
Aegeiceras Fantini Sestini, 1981
Aegocrioceratidae
Aegolytoceras Spath, 1924
Aetheloxoceras Chen & Qi, 1979
Aethiosolen Flower, 1968
Afrocimomia Adegoke, 1977
Afrolobites Becker & Bockwinkel, 2002
Agathiceratidae Arthaber, 1911
Aghdarbandites Krystyn & Tatzreiter, 1991
Agnostoceras Zhuravleva, 1986
Agoniatitidae Holzapfel, 1899
Agoniotitidae
Agrioceras Zhuravleva, 1974
Aigoceras Zhuravleva, 1972
Ainoceras Matsumoto & Kanie, 1967
Aipetoceras Zhuravleva, 1972
Akidocheilus Shimansky, 1947
Akroceras Zhuravleva, 1972
Akrosphaerorthoceras Ristedt, 1968
Aksuites Pavlov, 1967
Aktjuboceratidae
Aktjubocheilus Zhuravleva, 1972
Aktubinskia Ruzhentzev, 1947
Aktubonautilus Ruzhentzev & Shimanskii, 1954
Alaskinia Westermann, 1978
Albanitidae Waterhouse, 1999
Alborzites Schairer, Seyed-Emami & Zeiss, 1991
Alcidellus Westermann, 1958
Aleteceratidae
Alfeldites Westermann, 1975
Algericeras Spath, 1925
Algerites Pervinquière, 1910
Allanoceras Barskov, 1959
Alligaticeras Buckman, 1923
Alloceras Zhuravleva, 1974
Alloderoceras Wiedenmayer, 1980
Allogevanites Parnes, 1986
Allothalassoceras Leonova, 2002
Allotissotia Parnes, 1964
Allotrioceratidae
Almaloceras Zhuravleva, 1974
Almohadites Wiedmann, 1966
Alopecoceras Kennedy & Klinger, 1978
Alsatitoides Guex, 1980
Altayceras Wang
Alternacanthoceras Marcinowski, 1979
Altoconchella Waterhouse, 1994
Altunoceras Lai & Wang, 1986
Aluveroceras Balashov, 1955
Alvinoceras Zhuravleva, 1999
Alzadites Kennedy & Cobban, 1990
Amaltheidae
Amapondella Klinger & Kennedy, 1997
Amauroceras Buckman, 1913
Ammonitoceras Dumas, 1876
Ammotibetites Krystyn, 1982
Amoebites Buckman, 1925
Amoebopeltoceras Schweigert, 1995
Ampakabites Collignon, 1965
Amphiceras Gemmellaro, 1884
Amphipoanoceras
Amphororthoceras Kisselev, 1991
Amphyceras Levi, 1896
Ampletimoria Waterhouse, 1999
Ampthillia Arkell, 1947
Amundiptychites Kemper & Jeletzky, 1979
Anacleoniceras Mirzoyev, 1969
Anacrochordiceras Wang & He, 1976
Anagastroplites Jeletzky, 1980
Anahedenstroemia Spath, 1934
Anahoplitoides Casey, 1961
Analytoceras Hyatt, 1900
Analytoceratidae Spath, 1927
Anamesoceras Zhuravleva, 1978
Anarcestida (fossil)
Anarcestidae Steinmann, 1890
Anascaphites Hyatt, 1900
Anaspidoceras Vigh, 1984
Anastomoceras Flower, 1939
Anatexanites Matsumoto, 1970
Anavirgatites Spath, 1925
Ancistroceras Boll, 1857
Anclyoceras
Ancolioceras Buckman, 1899
Ancyloceratidae Gill, 1871
Ancylotropaeum Casey, 1980
Andersonites Van Hoepen, 1965
Anderssonoceratidae Ruzhencev, 1959
Andesites Gerth, 1925
Andiceras Krantz, 1928
Andreioceras Zhuravleva, 1972
Androgyroceras
Aneuretoceras Kennedy & Cobban, 1991
Anfaceras
Angranoceras
Angustobactrites Mapes, 1979
Anhuiceras Zou & Chen, 1979
Anisoceratidae Hyatt, 1990
Ankobites Collignon, 1958
Ankyloceras Zhuravleva, 1974
Annoceras Flower, 1964
Annulobactrites Mapes, 1979
Anomalosepia Khromov, 1987
Anonymoceras Zhuravleva, 1974
Antacaroceras Li, 1984
Antarcticoceras Thomson, 1974
Antarctiteuthis Doyle & Shakides, 2004
Anthodiscoceras Qin, 1986
Anthomorpha
Anthracoceratidae Plummer & Scott, 1937
Antigyroceras Barskov, 1972
Antilebetoceras Chen, 1983
Antilloceras Wierzbowski, 1976
Antonoceras Shimanski, 1957
Anuites Andrianov, 1985
Anuitidae
Apatoceras Zhuravleva, 1990
Aphanites
Aphyctoceras Zhuravleva, 1974
Aplococeratidae Spath, 1951
Apocrinoceratidae
Apoderoceras Buckman, 1921
Applanoceras Yang, Zheng & Liu, 1983
Apsidoceratidae
Apsorroceras Hyatt, 1900
Aptychopsis Barrande, 1872
Arabralia Nesis & Nikitina, 1987
Aramacites McKenzie, 1999
Araucanites Westermann & Riccardi, 1976
Araxoceratidae Ruzhencev, 1959
Araxonautilus Shimanskij, 1979
Arazdajanites Zhuravleva, 1978
Arcestidae Mojsisovics, 1875
Archendoceras Chen & Qi, 1979
Archiacoceratidae
Arcobelus
Arcthoplites Spath, 1925
Arcticoceras Spath, 1924
Arctoarpadites Tozer, 1994
Arctoasteroceras Frebold, 1960
Arctocephalites Spath, 1928
Arctoceratidae
Arctohungaritidae Vavilov, 1992
Arctomercaticeras Repin, 1968
Arctonautilus Sobolev, 1989
Arctophyllites Konstantinov, 1995
Arctoteuthis Saks, 1964
Arctotropites Tozer, 1994
Arcuncus Kulicki & Szaniawski, 1972
Ardescia Atrops, 1982
Arestoceras van Hoepen, 1946
Argentiniceras Spath, 1924
Argentoscaphites Blasco de Nullo, Nullo & Proserpio, 1981
Arieticeras Quenstedt, 1882
Arietitidae
Arionoceratidae
Arisphinctes Buckman, 1924
Arkellites Cope, 1967
Arkelloceras Frebold, 1958
Arkhangelskiceras Iljin, 1957
Arkonoceras Flower, 1945
Armenoceratidae
Armenocerina Chen, 1981
Arnaudiella Vermeulen, 1996
Arniotites Whiteaves, 1889
Arpaditidae Hyatt, 1900
Arterioceras Zhuravleva, 1978
Arthuroceras Shimansky, 1962
Artinksia
Artiphylloceras Chen, 1983
Asaphoceras Spath, 1924
Asapholytoceras Spath, 1927
Asbestoceras Zhuravleva, 1972
Ascoceratidae
Aserioceras Stumbur, 1962
Asiatostantanoceras Il'in, 1975
Askeatonoceras Turner, 1966
Aslisoceras Zhuravleva, 1978
Aspenitidae Spath, 1934
Asphinctites Buckman, 1924
Aspidoceratidae
Aspidostephanus Spath, 1925
Aspinoceras Anderson, 1938
Aspitella Waterhouse, 1996
Asseretoceras Balini, 1992
Asteiriceratidae
Asthenoceras Buckman, 1899
Astiericeras Parona & Bonarelli, 1897
Astieridiscus Kilian, 1910
Astoceras Zhuravleva, 1983
Astrabralia Nesis & Nikitina, 1987
Astreptoceras Henderson, 1970
Asymmetroceras Chen & Liu, 1974
Atahococeras Niko, Nishida & Nakazawa, 2000
Ataxioceratidae Buckman, 1921
Athanatoceras Zhuravleva, 1972
Atlantoceratidae Korn, 2001
Atlantosphinctes Wetzel, 1967
Atomoceras Zhuravleva, 1974
Atopobeloceras Yatskov, 1990
Atopoceras Zhuravleva, 1972
Atractites Gümbel, 1861
Atratoceras Librovich, 1957
Audaxlytoceras Fucini, 1920
Audouliceras Thomel, 1964
Aufuceras Zhao, Liang & Zheng, 1978
Auguritidae Bogoslovsky, 1961
Augustaceras Bucher, 1988
Aulacenoceras Tintant, 1987
Aulacoceratidae
Aulacogastrioceratidae
Aulacosphinctes Uhlig, 1910
Aulacosphinctoides Spath, 1924
Aulacostephanidae
Aulacostephanites Ziegler, 1962
Aulacostephanoceras Ziegler, 1962
Aulacostephanus Sutner & Pompeckj, 1896
Aulacoteuthis Stolley, 1911
Aulagonoceras Zheng, 1984
Aulasimoceras Spath, 1931
Aureimontanites Brochwicz-Lewinski, 1975
Auritina Egoian, 1989
Ausseites Flower, 1944
Aussites
Australiteuthidae C.C. Lu, 2005
Australotropaeum Aguirre Urreta, 1985
Austromorphites Leanza & Blasco, 1990
Austroteuthis Jeletzky & Zapfe, 1967
Aveyroniceras Pinna & Levi-Setti, 1971
Avramidiscus Vermeulen, 1996
Bactritella Shimansky, 1996
Bactritidae Hyatt, 1884
Baculitidae Gill, 1871
Badenia Enay, 1959
Badiotitdae
Badiotitidae
Badouceras Chen & Liu, 1976
Badoucerina Chen & Liu, 1976
Badouxia Guex & Taylor, 1976
Baeticoceras Geyssant, Enay & Busnardo, 1979
Bageites Zaborski, 1998
Bagnolites Donovan, 1998
Bairstowius Jeletzky
Bajarunia Dagys, 1983
Bajkaloceratidae
Bakhtoceras Kisselev, 1990
Balacheiloceras Korn, 2002
Balashovia Zhuravleva, 1974
Balashovoceras Kisselev, 1990
Balatonitidae Spath, 1951
Balkanites
Balkites Bogdanova & Kvantaliani, 1983
Balkoceratidae
Balochistaniceras Fatmi & Zeiss, 1999
Balticeras
Balticoceras
Baltoceratidae Kobayashi
Bambusoceras
Banikoceras Howarth, 1992
Baoenites Tatzreiter, 1981
Baraioceras Andrianov, 1985
Baronnites Bulot, Company & Thieuloy, 1990
Barrancyloceras Vermeulen & Bert, 1998
Barrandeoceratidae
Barrandoceratidae
Barremitites Avram, 1997
Barthelia Oloriz & Schairer, 1983
Barthelticeras Schairer, 1989
Bartoliniceras Taylor, Guex & Rakus, 2001
Baskaniiceras
Basleoceras
Basseoceras van Hoepen, 1968
Bassites Cobban, 1987
Bassleroceratidae Ulrich et al.
Bateroboceras Zou, 1983
Bathmoceratidae
Bauchioceras Reyment, 1954
Bavarinautilus Schairer & Barthel, 1977
Bavaripeltis Engeser & Keupp, 1997
Bayanoteuthididae
Bayanoteuthis Munier-Chalmas, 1871
Baykonaroceras
Bayleites
Beatoceras Zhuravleva, 1999
Beattonoceras Warren & Stelck, 1958
Beaumontaria Waterhouse, 2001
Beauvaisia Tintant, 1960
Beekmanoceras Ulrich & Foerste, 1935
Belemnella Nowak, 1913
Belemnellocamax Naidin, 1963
Belemnitellidae
Belemnitidae
Belemnitina
Belemnocamax Crick, 1910
Belemnopseidae
Belemnopsidae
Belemnoseidae
Belemnoteuthididae
Bellaclymenia Becker, 2002
Bellemnitellidae
Belloceras Cecioni, 1965
Beloceratidae Hyatt, 1884
Belopeltis Voltz, 1840
Belopteriidae
Belosepiellidae
Belosepiidae
Belospirula
Beloteuthidae
Benacoceras Spath, 1925
Benavidesites Cooper, 1982
Bendites Miller & Furnish, 1958
Beneckeiidae Waagen, 1895
Benetticeras Checa & Oloriz, 1984
Benjaminoceras Stait, 1984
Bentoceras Stumbur, 1962
Beoflemingites Waterhouse, 1996
Beraketites Collignon, 1960
Berbericeras Roman, 1933
Berckhemeria Schweigert & Zeiss, 1998
Berkhoceratidae Librovitch, 1957
Bernhardites Shevyrev, 1965
Berniceras Jeannet, 1951
Berriasellidae Spath, 1922
Berrosiceras
Besairieceras Collignon, 1962
Besairieites Collignon, 1931
Beschtubeites Il'in, 1975
Betiokytes Collignon, 1965
Bettoniceras Wiedenmayer, 1977
Betyokites
Beudantiella Breistroffer, 1947
Bevahites
Beyrichitidae
Bhimaites
Bigotites Nicolesco, 1918
Bihatites Tatzreiter, 1980
Bihenduloceras Spath, 1925
Billcobbanoceras Cooper, 1994
Biloclymeniidae Bogoslovsky, 1955
Biltnerites
Binneyitidae
Biplices Siemiradzki, 1898
Bisatoceratidae Miller & Furnish, 1957
Bisonoceras
Biventeria Waterhouse, 1999
Blanforidceras
Blaschkeiceras Zeiss, 2001
Bochianitidae
Bodeiceras Flower, 1984
Bodieceras
Bodoceras Frye, 1982
Bodrakiceras Baraboshkin & Mikahilova, 2000
Bodylevskites Klimova, 1978
Bodzoites Waterhouse, 1999
Boewanites Waterhouse, 1996
Bogoslovskya Zhuravleva, 1978
Bohemites Zhuravleva, 1962
Bohemojovellania Manda, 2001
Bojobactrites Horný, 1957
Bojobactritidae
Boletzkya Bandel, Reitner & Sturmer, 1983
Boletzkyidae
Bolloceratidae
Bonarellites Elmi, 1967
Boncheviceras Nikolov, 1966
Boreabraliopsis Tsuchiya & Okutani, 1988
Borealites
Boreiolagonibelus Gustomesov, 1989
Boreioteuthis Saks & Nal'nyaeva, 1966
Boreopeltis Engeser & Reitner, 1985
Boreophylloceras Alexeev & Repin, 1998
Borivites Yatskov, 1990
Borkinia
Borkowia Czarnocki, 1989
Borneoceras Schairer & Zeiss, 1992
Botellusoceras
Botryceras Flower, 1968
Botryoceratidae
Boucaulticeras Spath, 1924
Bouhamidoceras Dubar, 1962
Bouleiceras Thevenin, 1906
Brachycycloceratidae
Bradyia Bucher, 2002
Bragaria Waterhouse, 1999
Brahmaites Kossmat, 1897
Bramkampia Arkell, 1952
Brancoceratidae Spath, 1933
Branneroceratoides Kullmann, 1962
Brasilia Buckman, 1898
Bredyia Buckman, 1910
Breistrofferella Thieuloy, 1971
Breviatractites Mariotti & Pignat, 1992
Brevicoceratidae
Breviconoteuthis Rieber, 1973
Brewericeras Casey, 1954
Brightia Rollier, 1922
Brodekoceras
Brodieia Buckman, 1898
Broggiiceras Benavides-Cáceres, 1956
Brotheotrachyceras Urlichs, 1994
Bryocadoceras Meledina, 1977
Bucaillella Destombes, Juignet & Rioult, 1973
Buchitidae
Buckmanites Guex, 1973
Buelowiteuthis Jeletzky, 1965
Bugunzhites Shevyrev, 1995
Bullatimorphites Buckman, 1921
Bullettoceras Collins, 1966
Bunburyiceras Thomel, 1972
Burckhardites
Burroceras Cobban, Hook & Kennedy, 1989
Burronoceras
Busnardoites Nikolov, 1966
Butticeras Anderson, 1958
Byrrangoceras Dagys, 1997
Cacheoceras Flower, 1968
Cadomites Munier-Chalmas, 1892
Caenisites Buckman, 1925
Cagliceras Rulleau & Elmi, 2001
Caicedia Bürgl, 1956
Cainoceras van Hoepen, 1946
Calaiceras
Calchasiceras Shimanski, 1957
Caledonites Collignon, 1977
Calhounoceras Troeddson, 1926
Californiceras Shimizu, 1931
Calliconites Schwetzoff, 1913
Callihololobus He, 1985
Calliptychoceras Spath, 1924
Calliscaphites Leanza, 1970
Callizoniceras Spath, 1923
Calorthoceras Chen, 1981
Camereiceras Delanoy, 1990
Campitius Firby & Durham, 1974
Campylites Herrmannsen, 1846
Campylotoxia Baraboshkin & Mikhailova, 2000
Canavarella Buckman, 1904
Canavarites Hyatt, 1900
Cancelliceras Venturi & Nannarone, 2002
Cantianiceras Faraoni, Flore, Marini, Pallini & Pezzoni, 1997
Capreoliceras Alkaya & Meister, 1995
Capricornites Zhuravleva, 1974
Caracoliceras Von Hillebrandt, Kossler & Gröschke, 2000
Carbactinoceratidae
Cardabites Brunnschweiler, 1966
Cardioceratidae
Carinites Atrops & Reboulet, 1995
Carinoclymeniidae Bogoslovsky, 1975
Carnitidae Arthaber, 1911
Carotites Zhuravleva, 1972
Carstenia Hyatt, 1903
Carteria Guex, Hungerbühler, Jenks, Taylor & Bucher, 2005
Carthaginites Pervinquiére, 1907
Caseyiceras Sazonova, 1971
Caspianites
Cassidoiceras Dimitrova, 1967
Cassinoceroides Xu & Lai, 1987
Castellanibelus Combemorel, 1972
Catasigaloceras Buckman, 1923
Catenohalorites Tatzreiter, 1980
Catriceras Venturi, 1978
Caucasochordiceras Shevyrev, 1995
Caumontisphinctes Buckman, 1920
Cayogoceras
Ceccaites Cresta, 1997
Cedarvilleoceras Shimizu & Obata, 1935
Celtitidae
Cenisella Delamette & Latil, 1989
Cenomariella Cooper, 1999
Cenostlingoceras Cooper, 1999
Centauroceras Blind, 1963
Centrocyrtocerina Stait, 1983
Ceratitidae Mojsisovics, 1879
Ceratobeloceras House & Kirchgasser, 1985
Ceratosphinctes Ziegler, 1959
Ceratotuberculus Imlay, 1938
Cetonoceras Wiedenmayer, 1977
Chabactoceras Malinovskaya, 1964
Chacantuceras Aguirre-Urreta & Rawson, 1999
Chalalabelus Jeletzky, 1981
Chamalocia Thieuloy, 1971
Chamoussetia Douvillé, 1911
Chanaceras Chao, 1976
Chanasia Rollier, 1922
Changjiangoceras Xu & Lai, 1983
Changkiuoceras Shimizu & Obata, 1935
Chantrakionoceras Lamont, 1978
Chaoceras Yatskov, 1990
Chaohuceras Qi, 1980
Charchagoceras Lai, 1987
Charlotticeras Smith & Tipper, 1996
Chazhuangoceras Cheng, 2000
Cheiloceratidae Frech, 1897
Chesapeakiceras Kennedy & Cobban, 1998
Chetaites Shulgina, 1962
Chicagooceras Foerste & Savage, 1927
Chieseiceras Brack & Rieber, 1986
Chigaroceras Howarth, 1992
Chihlioceratidae
Chimbuites Casey, 1958
Chinitnites Imlay, 1975
Chisiloceras Gortani, 1934
Chitinobelus Fischer, 1981
Chitinoteuthididae
Chitinoteuthis Müller-Stoll, 1936
Choanoceratidae
Choffatia Siemiradzki, 1898
Choffatisphinctes Beznosov, 1982
Choicensisphinctes Leanza, 1980
Chondromileia Westermann & Riccardi, 1979
Chondroteuthis Bode, 1933
Choreanoceroides
Choristoceratidae Hyatt, 1900
Christioceratidae Nassichuk & Furnish, 1965
Christophoceras
Chrysoceras Zhuravleva, 1972
Chuandianoceras Wang, 1978
Chuannanoceras Wang, 1978
Chuticeras Zhuravleva, 1972
Chutoceras Becker & House, 2000
Chuvashovia Doguzhaeva, 2002
Chuxianoceras Chen, 1983
Cicatrites Anthula, 1899
Cicatritidae
Ciryella Wiedmann, 1960
Cixianoceras Lai, 1985
Cladiscitidae Zittel, 1884
Clambites Rollier, 1922
Claviatractites Mariotti & Pignatti, 1996
Claviceras Venturi & Nannarone, 2002
Clavinautilus Zhao, Liang & Zheng, 1978
Clavithurmannia Busnardo, Thieuloy & Moullade, 1979
Cleistosphinctes
Cliefdenoceras Stait, Webby & Percival, 1985
Climacoceras Chen, 1976
Clinoceratidae
Clionitidae
Clionititidae Arabu, 1932
Clistoceratidae Ruzhencev, 1975
Clitendoceroides Xu & Lai, 1987
Cloioceras Whitehouse, 1927
Clydinceratidae
Clydomphalites Arkell, 1952
Clydonitidae Mojsisovics, 1879
Clymenidae
Clymeniidae Edwards, 1849
Clypeoceratidae
Clypeoceratoides Dagis & Ermakova, 1990
Coahuilites Böse, 1928
Cobbanites Imlay, 1962
Cobbanoceras Matsumoto, 1965
Cobbanoscaphites
Cochlioceroides Lai & Xu, 1983
Cochloceratidae Hyatt, 1900
Coctebelus Weiss, 1991
Coeloceratidae
Coeloderoceras Spath, 1923
Coeloteuthis Lissajous, 1906
Coilopoceratidae Hyatt, 1903
Colchenoceras Waterhouse, 1996
Collectoceras Ruzhentzev & Bogoslovskaya, 1971
Collignoniceratidae Wright & Wright, 1951
Collina Bonarelli, 1893
Collinites Atrops, 1972
Collotia Grossouvre, 1917
Coloradoscaphites Cooper, 1994
Colpoceras Hall, 1850
Columbisculites Tozer, 1994
Columbitidae Spath, 1934
Columboceras Bucher, 2002
Colvillia Imlay, 1961
Comaroceras Zhuravleva, 1972
Communicobelus Ghustomesov, 1964
Compactoceras Becker, 2002
Concavites Jeannet, 1951
Conchaqinghaia Waterhouse, 1999
Conchorhynchos Paetel, 1875
Conchorhynchus Blainville, 1827
Conchorhyncus Carpenter, 1861
Conlinoceras
Conoarmenoceras Lai, 1985
Conobelemnopsis Riegraf, 1980
Conobelus Stolley, 1919
Conoceras Bronn, 1835
Conodicoelites Stevens, 1965
Conorhynchus Nagao, 1931
Conoteuthis d'Orbigny, 1842
Constileioceras
Constrigymnites Bucher, 1992
Coralloceras Zhuravleva, 1962
Corbuloceras Horný, 1965
Cordubiceras
Coreanoceroides Qi, 1980
Cornalinautilus Engeser, 1995
Cornuella Shimanskii, 1968
Cornuncus Kulicki & Szaniawski, 1972
Corongoceras Spath, 1925
Coronites Hyatt, 1903
Coryceras Ziegler, 1958
Corysoceras Zhuravleva, 1974
Costacadoceras Rawson, 1982
Costaceltites Waterhouse, 1999
Costacirculus Waterhouse, 1999
Costaclymeniidae Ruzhencev, 1957
Costamenjaites Sazonova, 1971
Costastephanites Waterhouse, 1999
Costiceras Contini, 1969
Costigymnites Krystyn & Tatzreiter, 1991
Costileioceras
Costiphylloceras Joly, 2000
Cottreauites Collignon, 1929
Couloniceras Busnardo, Enay & Pitre, 1966
Courtilloticeras Guex, Hungerbühler, Jenks, Taylor & Bucher, 2005
Cowtoniceras
Craftonoceras
Craginites Young, 1957
Cranocephalites Spath, 1932
Craspeditidae
Craspedodiscus Spath, 1924
Crassiatractites Mariotti & Pignat, 1992
Crassiceras Merla, 1933
Crassiplanulites Buckman, 1921
Cravenites
Cravenoceratidae Ruzhencev, 1957
Cravenocratidae
Crenuloceras Flower, 1968
Crestaites Rulleau & Elmi, 2001
Crimobelus Gustomesov, 1977
Criobaculites Klinger & Kennedy, 1997
Crioceratitidae
Criohimantoceras Thieuloy & Bulot, 1992
Criosarasinella Thieuloy, 1977
Cruasiceras Busnardo, 1970
Crussoliceras Enay, 1959
Cryptoclymenia Hyatt, 1884
Cryptocycloceras Shimanskii, 1968
Cryptorthoceras Flower, 1939
Cteroelymenia Bogoslovskij, 1979
Cubaochetoceras
Cubaspidoceras Myczynski, 1976
Cullus Shimanskii, 1968
Cuneicardioceras Arkell, 1941
Curiolites Vermeulen, 1995
Curtohibolites Stoyanova-Vergilova, 1963
Curviceras Blind, 1963
Curvites Petter, 1959
Cutchisphinctes Spath, 1931
Cuyaniceras Leanza, 1945
Cyclobuttsoceras Chen, 1976
Cycloceltidae
Cycloceltitidae Tozer, 1979
Cycloceratidae
Cyclolituites Remelé, 1886
Cyclolobidae Zittel, 1895
Cyclonybyoceras Chen, 1984
Cyclostomiceratidae Foerste
Cylindroteuthididae
Cylindroteuthis Bayle, 1878
Cylioceras
Cymaceras Quenstedt, 1887
Cymaclymeniidae Hyatt, 1884
Cymahoplites Spath, 1922
Cymbitidae
Cyphoceras Ward & Mallory, 1977
Cyptendocerina Ulrich, Foerste, Miller & Unklesbay, 1944
Cyrtendoceratidae
Cyrtoceratidae
Cyrtocerinidae
Cyrtochilus Sandberger, 1875
Cyrtoclymeniidae Hyatt, 1884
Cyrtodeformoceras Li & Li, 1985
Cyrtogomphoceratidae
Cyrtopleuritidae Diener, 1925
Cyrtoptychoceras Kennedy & Henderson, 1992
Cyrtorhabdoceras Wiedmann, 1973
Cyrtospyroceras Flower, 1938
Cyrtothoracoceras Turner, 1953
Cyrtractoceras Chen, 1981
Dactylioceratidae Hyatt, 1867
Dactyloteuthis Bayle, 1878
Daedaloceras Zhuravleva, 1978
Dalaticeras Meister, Vu Khuc & Tran Huyen, 2002
Dalecarlioceras Frye, 1987
Dalmasiceras Djanélidzé, 1922
Damesiceras
Danatoceras Zhuravleva, 1989
Danubisphinctes Zeiss, 1968
Danubitidae Spath, 1951
Daobaowanceras Xu & Lai, 1987
Daobaowanceroides Xu & Lai, 1987
Daraelitidae Tschernow, 1907
Darellia Buckman, 1898
Dartoceras Foerste, 1936
Dartonoceras
Darvasiceratidae
Dasyceras Hyatt, 1900
Davidiceras Vermeulen, 2003
Dawsonoceratidae
Dayiceras Spath, 1920
Dayongoceras Lai & Qi, 1977
Decipia Arkell, 1937
Decoritidae Ruzhencev & Bogoslovskaya, 1975
Defordiceras Young, 1963
Deformoceras Li & Li, 1985
Deiloceras Zhuravleva, 1972
Deinoceras Zhuravleva, 1972
Deinuncus Kulicki & Szaniawski, 1972
Deiradoceras Hoepen, 1931
Delecticeras Arkell, 1951
Delepinoceratidae Ruzhencev, 1957
Delgadoa Thadeu, 1947
Delphinites Sayn, 1901
Delphinites Becker & House, 1993
Delphinoteuthis Mariotti & Pignat, 1993
Deltoceras Buckman, 1902
Demubelus Challinor, 1991
Derolytoceras Rosenberg, 1909
Derolytoceratidae
Deshayesitidae
Desmoceratidae Zittel, 1895
Desmoscaphites Reeside, 1927
Desmosphinctes Schindewolf, 1925
Detoniceras Manfrin & Mietto, 1991
Dettermanites Imlay, 1961
Devonocheilidae
Devonohelicoceras Niko & Nishida, 2003
Devonopronoritidae Bogoslovsky, 1958
Dhosaites Spath, 1924
Dhrumaites Arkell, 1952
Diagoceras Flower, 1936
Diaplococeras Hyatt, 1900
Diaziceras Spath, 1921
Dichotomosphinctes Buckman, 1926
Dickersonia Imlay, 1942
Dicoelites Böhm, 1906
Dicoelitidae
Dicostella Busnardo, Enay & Pitre, 1966
Dictyoceras Eichwald, 1860
Didymitidae Haug, 1894
Didymoceratoides Kennedy & Cobban, 1993
Dieneroceratidae Kummel, 1952
Diestoceratidae Foerste
Diestocerina Chen & Liu, 1976
Difunites
Dihamites Matsumoto, 1977
Dimeroceratidae Hyatt, 1884
Dimetobelidae
Dimitobelidae
Dimitocamax Doyle, 1988
Dimorphoceratidae Hyatt, 1884
Dimorphoplites Spath, 1925
Dinaritidae Mojsisovics, 1882
Dinolytoceras Beznosov, 1956
Diodochoceras
Diplasioceras
Diplesioceras Buckman, 1920
Diplobelidae
Diplobelus Naef, 1926
Diploceras Conrad, 1842
Diplomoceratidae Spath, 1926
Dipoloceratidae
Dipoloceroides Breistroffer, 1947
Dirrymoceras Hyatt, 1900
Discamphiceras Spath, 1923
Discites de Haan, 1825
Discohoplites Spath, 1925
Discoidellia Vermeulen, 1995
Discophyllitidae Spath, 1927
Discoproptychites Kiparisova, 1956
Discosoridae
Discosphinctes Dacqué, 1914
Discosphinctoides
Discovascoceras Collignon, 1957
Disjunctoceras Gnoli & Kisselev, 1994
Disphenoceras
Dissidoceras Zhuravleva, 1964
Dissimilites Sarkar, 1954
Distichitidae Diener, 1920
Dittmaritoides Arkhipov & Vavilov, 1980
Divisosphinctes Beurlen, 1925
Djanaliparkinsonia Kutuzova, 1975
Djurjuriceras Roman, 1936
Doaboceras Boulin, Bouyx, Termier & Termier, 1980
Dobaosiceras Wang, 1978
Dobrodgeiceras
Dobshinaeceras Vanova, 1987
Docidoceras Buckman, 1919
Doleroceras Zhuravleva, 1972
Dolganites Repin, 2002
Domeykoceras von Hillebrandt, 1977
Donacoceras Foerste, 1925
Donenriquoceras Wiedmann, 1960
Dongshanoceras Zou & Chen, 1979
Donovaniconidae
Donovaniteuthis Engeser & Keupp, 1997
Dordiella Reyment, 1958
Doridiscus Casey, 1961
Dorkadoceras Zhuravleva, 1978
Dorsoplanites Semenoff, 1897
Dorsoplanitidae
Dorsoplanitoides Zeiss, 1968
Doubichites
Douvilleia Parnes, 1988
Douvilleiceratidae
Drakeoceras Young, 1957
Drakonoceras Zhuravleva, 1972
Dronovites Shevyrev, 1990
Duashnoceras Westermann, 1981
Dubariceras Dommergues, Mouterde & Rivas, 1984
Dubariceratidae Dommergues & Meister, 1999
Dudresnayiceras Rakus, 1994
Durangites Burckhardt, 1910
Durotrigensia Buckman, 1928
Duvalibelus Gustomesov, 1977
Duvaliidae Pavlow, 1914
Dynatoceras Zhuravleva, 1972
Dzhanganoceras Zhuravleva, 1989
Dzhulfitidae Shevyrev, 1965
Dzulfitidae
Eboraciceras Buckman, 1918
Eboroceras Basse, 1946
Ebrayiceras Buckman, 1920
Eburoceras Zou & Chen, 1979
Echigoceras Niko, 2002
Echioceratidae
Echioceratoides Trueman & Williams, 1925
Echiocheras
Eckhardites Mitta, 1999
Ectocentritidae
Ectomixosiphonoceras Li Xuesen & Cheng Liren, 1988
Edenoceras Myagkova, 1967
Eedenoceras van Hoepen, 1968
Effenbergia Korn, 2002
Egoianiceras Avram, 1974
Egrabensiceras
Eichiniceras Gygi, 1998
Eidophylloceras Joly, 1993
Eidoprobeloceras Kirchgasser, 1968
Elaphoceras Zhuravleva, 1972
Elatmites Shevyrev, 1960
Eldroceras
Elkanoceras Flower, 1971
Elleficeras Kemper & Jeletzky, 1979
Ellesmeroceratidae Kobayashi
Ellesmeroceroides Xu & Lai, 1983
Ellipsoceras Collignon, 1950
Elongaticeras Wang, 1978
Elpisoceras Zhuravleva, 1972
Emaciaticeras Fucini, 1931
Emmonsoceratidae
Enayites Brochwicz-Lewinski & Rozak, 1976
Encycloceras Blind, 1963
Endemoceras Thiermann, 1964
Endoceratidae Teichert
Endoceroides Lai, 1985
Endostokesoceras Schindewolf, 1944
Engonoceratidae
Engorthoceratidae
Enigmoceras Hook & Flower, 1977
Enosphinctes Schindewolf, 1925
Ensorites van Hoepen, 1968
Entimoceras Zhuravleva, 1972
Entimoceratidae
Entogonitidae Ruzhencev & Bogoslovskaya, 1971
Eoadnatoceras Wang, 1978
Eoamaltheus von Hillebrandt, 1981
Eoataxioceras Gygi, 2001
Eobelemnites Flower, 1945
Eocameroceras Li, 1984
Eocanadoceras Anderson, 1958
Eocephalites Imlay, 1967
Eochetoceras Spath, 1928
Eoclarkoceras Chen & Qi, 1979
Eocyckistomiceras
Eocyclostomiceras Chen, 1983
Eocylindroteuthis Riegraf, 1980
Eocyrtoceras
Eoderoceras Spath, 1925
Eoderoceratidae
Eodesmoceras Spath, 1923
Eodesmoceratidae
Eodiaphragmoceras Chen & Qi, 1979
Eodidymoceras Klinger & Kennedy, 2003
Eodouvilleiceras
Eoectenolites Chen & Qi, 1979
Eofalciferella Brunschweiler, 1959
Eofuciniceras Cantaluppi, 1970
Eogonioloboceratidae Ruzhencev & Bogoslovskaya, 1978
Eogunnarites Wright & Matsumoto, 1954
Eohecticoceras Zeiss, 1959
Eoheteroceras Vasícek & Wiedmann, 1994
Eohypoturrilites Scholz, 1973
Eokosmoclymenia Czarnocki, 1989
Eolegoceras Leonova, 1989
Eoleptoceras Manolov, 1962
Eolytoceras Frebold, 1967
Eomadrasites Matsumoto, 1955
Eopachydiscus
Eoparabactrites Mapes, 1979
Eoprotogrammoceras Cantaluppi, 1970
Eoptychitoides Waterhouse, 1996
Eosagenitidae Tozer, 1994
Eosonneratia Saveliev, 1973
Eosphinctoceras
Eostereotoceras Chen, 1981
Eostromatoceras Chen, 1976
Eosturia Bando & Ehiro, 1982
Eotetragonites Breistroffer, 1947
Eoteuthoides Kostak, 2002
Eothinoceratidae
Eotripteroceras
Eotumaroceras Andrianov, 1985
Eovavilovites Ermakova, 2001
Epacrioceras Egoyan, 1974
Epancyloceras Spath, 1930
Epanisoceras Collignon, 1962
Eparietites Spath, 1924
Epaspidoceras Spath, 1931
Ephamulina Collignon, 1963
Epiboreoceras Dagys, 1999
Epicephalites Spath, 1928
Epicosmoceras Model & Model, 1938
Epidauronautilus Engeser, 1995
Epideroceras Spath, 1923
Epiglyptoxoceras
Epigonites
Epimayaites Spath, 1928
Epimayites
Epimorphoceras Spath, 1928
Epipallasiceras Spath, 1936
Epipeltoceras Spath, 1924
Epipuzosia Matsumoto, 1988
Episageceratidae Ruzhencev, 1956
Episculitidae Spath, 1951
Epistrenoceras Bentz, 1928
Epitropaeum Kakabadze, 1977
Epivirgatites Spath, 1924
Epizigzagiceras Frebold & Tipper, 1973
Epophioceras Spath, 1924
Eptitauroceras
Erdbachites Weyer, 1965
Erdenella
Eremiticeras Faraoni, Marini, Pallini & Venturi, 2002
Eridites Zhuravleva, 1961
Erioliceras van Hoepen, 1955
Eristavia Kakabadze, 1967
Eristavites Nikolov, 1966
Erlangericheilus Shimansky, 1947
Ermoceras Douvillé, 1916
Ernosoceras Xu & Lai, 1987
Ernstbrunnia Zeiss, 2001
Erycitoides Westermann, 1964
Erymnocerites Jeannet, 1951
Esericeras Buckman, 1920
Esinoceras Fantini Sestini, 1996
Eskimoceratidae
Esopoceras Stanley & Teichert, 1976
Espaniceras
Esseshahoceras Waterhouse, 1999
Estonioceratidae
Etropolia Sapunov, 1971
Euaptetoceras Buckman, 1922
Eubaculiceras Brunnschweiler, 1966
Eubranoceras
Eucoroniceras Spath, 1922
Eucycloceras Spath, 1924
Eudiplomoceras Brunnschweiler, 1966
Eudmetoceras Buckman, 1920
Eudoceras
Euhemihoplites Collignon, 1964
Euhoploceras Buckman, 1913
Euhyphantoceras Shimizu, 1935
Eulagonibelus Gustomesov, 1989
Eulomacoceras Zhao, Liang & Zheng, 1978
Eulunulites Elmi, 1967
Euphylloceras
Eupleuroceratidae Ruzhencev, 1957
Euprionoceras Spath, 1935
Eurasenia Geyer, 1961
Euristomiceras Beznosov, 1956
Euroscaphites Jagt, Kennedy & Machalski, 1999
Euryarthroceras Chen, 1981
Eurycephalites Spath, 1928
Eurycheilus Septfontaine, 1970
Eurydeformoceras Li & Li, 1985
Euryendoceras Chen, 1983
Eurynoticeras Canavari, 1897
Eushantungoceras Shimizu & Obata, 1935
Euskadiceras Kuechler, 2000
Eutexanites Klinger & Kennedy, 1980
Euthyocycloceras Chen, 1981
Euturrilites
Euvirgalithacoceras Zeiss, Schweigert & Scherzinger, 1996
Euvirgoceras Chen & Liu, 1974
Evenites Dagys & Ermakova, 1988
Ewaldiceras Vermeulen, 2003
Exicrioceras Anderson, 1958
Exochoceras Zhuravleva, 1972
Exomiloceras Wiedenmayer, 1979
Externiceras Sazonova, 1971
Ezeiceras Vermeulen & Bert, 1998
Falciferella Casey, 1954
Falcuncus Kulicki & Szaniawski, 1972
Falloticeras Parona & Bonarelli, 1897
Fallotites Wiedmann, 1960
Falsebayites van Hoepen, 1965
Fanninoceras McLearn, 1930
Faraudiella Breistroffer, 1947
Farbesiceras
Farinaccites Faraoni, Marini, Pallini & Venturi, 1997
Farnhamia Casey, 1954
Farroceras Flower, 1968
Fauriella Nikolov, 1966
Favreticeras Bucher, 1992
Fehlmannites Jeannet, 1951
Feichengoceras Zhang, Wang & Wang, 1994
Fenfengoceras Lai, 1980
Fengfengoceras Lai, 1980
Fenxiangoceras Xu & Lai, 1987
Ferganoceratidae Ruzhencev, 1960
Fergusonites Guex, 1980
Fibroceras Lai, 1985
Fieldingia Cantaluppi, 1970
Fieldingiceras Wiedenmayer, 1980
Fierrites Cantu Chapa, 1993
Fikaites Zaborki, 1994
Fissilobiceras Buckman, 1919
Flabellia Mangold, 1970
Flabellisphinctes Mangold & Elmi, 1966
Flemingitidae Hyatt, 1900
Flettoceras Lamont, 1978
Flexispinites Schairer, 1984
Flickia Pervinquière, 1907
Flickiidae
Flowerites Zhuravleva, 1972
Fluminites van Hoepen, 1965
Foersterinautilus Engeser, 1995
Folioceras Collins, 1969
Follimitoceras Ruan, 1995
Fontanelliceras Fucini, 1931
Fontannesiella Spath, 1925
Forbescieras
Forbesiceratidae Wright, 1952
Fournierella
Franchia Sturani, 1966
Franconites Zeiss, 1968
Fraudatoroceras van Hoepen, 1965
Freboldiceras Imlay, 1959
Freboldites Taylor, 1988
Frechiella Prinz, 1904
Frechitoides Konstantinov, 1987
Frechoceras Kisselev, 1990
Frenguelliceras Leanza, 1945
Frogdenites Buckman, 1921
Fuchsites Waterhouse, 1996
Fuciniceras Haas, 1913
Fukujiceras Niko, 1996
Furloceras Elmi & Rulleau, 1995
Furnishoceratidae
Furoniceras Collignon, 1957
Fusicoceras Flower, 1939
Fusiteuthis Kongiel, 1962
Fususiteuthis Glazunova, 1969
Gabetites Waterhouse, 2002
Gabillytes Guex, 1971
Galaticeras
Galbanites Buckman, 1922
Galeanites Cantu-Chapa, 1999
Gandakites Krystyn, 1982
Gansuceras Li, 1982
Gaoluoceras Xu, 1977
Garantiana Hyatt, 1900
Garniericeras Spath, 1924
Garnierisphinctes Enay, 1959
Garryoceras Foerste, 1928
Gastrioceratidae Gordon, 1964
Gastrobelus Naef, 1922
Gastroplites McLearn, 1930
Gattendorfiidae Bartzsch & Weyer, 1987
Gaudryceratidae Spath, 1927
Gazdaganites Mirzoyev, 1969
Geczya Fantini Sestini, 1977
Geczyceras Martinez Gutierrez, 1992
Geisonoceratidae Zhuravleva, 1959
Geisonocerella Zhuravleva, 1978
Geisonoceroides Flower, 1939
Geminites Baloge & Cariou, 2001
Gemmellaroceras Hyatt, 1900
Gentoniceras Thomel, 1972
Geopeltididae
Georgina Wade, 1977
Georginidae
Georgioceras
Gephuroceratidae Frech, 1897
Gephyroceras Carus, 1884
Germanites Mascke, 1906
Germanoides Westermann, 1956
Germariceras
Gerthiceras Westerman & Riccardi, 1982
Gervasuttia Sestini, 1994
Geyeroceras Hyatt, 1900
Gillieronibelus Janssen, 2003
Gingemoceras Zhuraleva, 1982
Ginsburgites Bucher, 1992
Giralites Brunnschweiler, 1966
Girtyoceratidae Wedekind, 1918
Gissarites Ilyin, 1958
Glabrites Waterhouse, 1999
Glabrophysodoceras Scott, 1943
Glaphyriidae
Glaphyritidae Ruzhencev & Bogoslovskaya, 1971
Glatziellidae Schindewolf, 1928
Glaucolithites Buckman, 1922
Gleviceras Buckman, 1918
Globosonneratia Saveliev, 1973
Globulobactrites Mapes, 1979
Glochinomorphidae
Glottoceras Hyatt, 1875
Glottoptychinites Buckman, 1923
Glyptarpites Buckman, 1927
Glyptia Rogov, 2000
Glyptoceras Foerste, 1893
Gobioceras Bogoslovskaya, 1988
Goliathiceras Buckman, 1919
Goliathites Arkell, 1943
Gomphoceras Sowerby, 1839
Gomphocerus Herrmannsen, 1852
Gomplioceras Foerste, 1929
Gonatocheilus Till, 1908
Goniatitidae Haan, 1825
Goniocamax Naidin, 1963
Gonioceratidae
Gonioclymeniidae Hyatt, 1884
Gonioglyphioceratidae
Gonioloboceratidae Spath, 1934
Gonioteuthis Bayle, 1878
Gonolkites Buckman, 1925
Gordonites Miller & Furnish, 1958
Gordonoceras Teichert & Glenister, 1953
Gorodzovia Ivanov & Aristov, 1969
Gouldoceras Stait, 1980
Gouldoceratidae
Gracilisphinctes
Graciloceratidae
Graeconautilus Engeser, 1995
Graefenbergites Schairer & Schlampp, 2003
Gramadella Fischer & Riou, 1982
Grandidiericeras
Grantziceras Imlay, 1961
Granulochetoceras Geyer, 1960
Graphoceras Buckman, 1898
Graphoceratidae
Gravesia Salfeld, 1913
Grayiceras Spath, 1924
Greenlandibelus Jeletzky, 1965
Greenlandoceratidae
Gregoryceras Spath, 1924
Greisbachoceras Miller, 1932
Griesbachoceras Spath, 1934
Groebericeras Leanza, 1945
Grumantoceras Sobolev, 1989
Grycia Imlay, 1961
Guangyuanoceras Lai & Zhu, 1986
Guangyuanoceratidae
Guangyuanoceroides Lai & Zhu, 1986
Guderianites Wiedmann, 1962
Guerangericeras Thomel, 1972
Guerrericeras Sandoval & Westermann, 1990
Guexiceras Taylor, 1998
Guexites Bucher, 1992
Guhsania McLearn, 1926
Guixianoceras Lai Caigen & Zhang Zhenxian, 1988
Guleilmites
Guleimiceras
Guleites Guo, 1984
Gulielmina Buckman, 1925
Gymnitidae Waagen, 1895
Gymnobactrites Mapes, 1979
Gymnodiscoceras Spath, 1925
Gymnoplites Spath, 1933
Gyroclymenia Czarnocki, 1989
Gyrolevisoceras Lai, 1984
Gyronitidae
Haboroceras Toshimitsu, 1988
Hadrocheilus Till, 1908
Haidingerites Mojsisovics, 1893
Haletoceras Yatskov, 1990
Haloites Chen, 1981
Haloritidae Mojsisovics, 1893
Hamadaites Niko, 1996
Hamitella Breistroffer, 1947
Hamitidae Gill, 1871
Hamitoides Spath, 1925
Hammatoceratidae
Hamulinidae
Handanoceras Lai, 1985
Hannaites Imlay, 1957
Hanshanoceras Qi, 1984
Hantkeniceras
Haploceratidae
Haplophylloceras Spath, 1925
Haploscaphites
Harpoceratoides Buckman, 1909
Harpohildoceras
Harpophylloceras Spath, 1927
Harrisoceroides Wang, 1978
Hartmannibelus Gustomesov, 1977
Haruspex Shimanskii, 1968
Hasselbachia Korn & Weyer, 2003
Hastatidae
Hastites Mayer, 1883
Hastitidae
Hastula Zhuravleva, 1978
Haugiceras Cossmann, 1900
Hebetoceratidae
Hebetoxyites Buckman, 1924
Hectioceratoides
Hectoroceras
Hedenstroemiidae Waagen, 1895
Hediscus Waterhouse, 1996
Hefengnautilus Xu, 1977
Hegaratia Patrulius & Avram, 1976
Hegaratites Boughdiri, Enay, le Hegarat & Memmi, 1999
Hegovisphinctes Zeiss, Schweigert & Scherzinger, 1996
Heinzia Sayn, 1890
Helicancyloceras Klinger & Kennedy, 1977
Heloceras Eichwald, 1860
Hematitidae
Hemibeloitoceras
Hemicenoceras Tintant, 1984
Hemiceratites Eichwald, 1840
Hemicircoceras Lai & Xu, 1987
Hemicosmorthoceras Ristedt, 1969
Hemigarantia Spath, 1928
Hemihaploceras Spath, 1925
Hemihibolites Gustomesov, 1976
Hemihoplitidae
Hemiparinodiceras Géczy, 1959
Hemiphragmoceratidae Foerste, 1926
Hemipiloceras Shimizu & Obata, 1935
Hemisimoceras Spath, 1925
Hemitetragonites Spath, 1927
Hengestites Casey, 1960
Hengshanites Zhou Zuren, 1985
Heraclitidae Diener, 1920
Hercoceratidae Hyatt, 1884
Hertleinia Imlay, 1957
Hertleinites
Herznachites Jeannet, 1951
Hesperoceras Miller & Youngquist, 1947
Heterabralia Tsuchiya & Okutani, 1988
Heteroceratidae Spath, 1922
Heterokeratinites Zeiss, 1968
Heteroptychoceras Matsumoto, 1977
Hettneria Bürgl, 1956
Heyuncunoceras Chen, 1981
Hibolite Reichenbach, 1828
Hibolites Berthold, 1827
Hibolithes Montfort, 1808
Hibolithus Oken, 1815
Hidamichelinoceras Niko, 2000
Hildagoceras Cooper, 1999
Hildoceratidae
Hildoceratoides Buckman, 1921
Hildoglochiceras Spath, 1924
Himalayites Böhm, 1904
Himalayitidae
Himantoceratidae
Himispiticeras
Himoceras Waterhouse, 1996
Himophiceras Waterhouse, 1994
Hinganoceras Liang, 1981
Hiregiroceras
Hlawiceras Buckman, 1921
Hluhluweoceras Van Hoepen, 1965
Hoelderia Ohmert & Zeiss, 1980
Hoeloceras Sweet, 1958
Hoepenites
Hoffmannia Forcart, 1953
Hofmanniceras Vigh, 1984
Holcobeloides Gustomesov, 1958
Holcobelus Stolley, 1927
Holcodiscidae
Holcodiscoides Spath, 1922
Holcolissoceras Spath, 1928
Holcolytoceras Spath, 1924
Holcoptychites Gerth, 1921
Hollanditidae Waterhouse, 1999
Hollisites Imlay, 1957
Hollwediceras Jeletzky & Kemper, 1988
Holmiceras Hyatt, 1894
Holzbergia Torrens, 1971
Homaloteuthis Stolley, 1919
Homoceratidae Spath, 1934
Homoeoplanulites Buckman, 1922
Homolsomites Crickmay, 1930
Honnoratia Busnardo, Charollais, Weidmann & Clavel, 2003
Hopeioceras
Hoplikosmokas
Hoplitidae Douvillé, 1890
Hoplitocrioceras Giovine, 1950
Hoplocardioceras Spath, 1935
Horioceras Munier-Chalmas, 1892
Hornyoceras Kiseliov, 1988
Hosoureites Sato, 1958
Hourcquia Collignon, 1965
Hoyoceras Stait, Wyatt & Burnett, 1987
Huaiheceras Zou & Chen, 1979
Huaiheceratidae
Huaihecerina Jun-Yuan & Teichert, 1983
Huananoceratidae Zhao et al., 1978
Huanghuachangoceras Chen & Zou, 1984
Huanxianoceras Lai, 1982
Huaqiaoceras Xu & Lai, 1987
Hubeitoceras Waterhouse, 1994
Hubertoceras Spath, 1930
Hudlestonia Buckman, 1891
Huescarites Latil, 1990
Hugueninsphinctes Atrops, 1982
Huiaihecerina
Hulenites Matsumoto, 1955
Humboldtites Silberling & Nichols, 1982
Humeoceratidae
Hungaritidae Waagen, 1895
Hungarosepia Doyle, Donovan & Nixon, 1994
Hunjiangoceras Zhu & Li, 1996
Hunyuanoceras Jun-Yuan & Teichert, 1983
Hunyuenoceras
Huroniidae
Hyattoceratidae
Hybolithus Agassiz, 1846
Hybonoticeras Breistoffer
Hybopeltoceras Oloriz, 1977
Hyperderoceras Spath, 1926
Hyperlioceras Buckman, 1889
Hyperpuzosia Matsumoto, 1988
Hypershumardites Popov, 1992
Hyposcaphites Wiedmann, 1965
Hypostlingoceras Matsumoto & Takahashi, 2000
Hypoxynoticeras Spath, 1925
Idiobeloceras Yatskov, 1990
Idiocycloceras Spath, 1928
Ignoceras Flower, 1976
Ilovaiskioceras Sazonov, 1960
Ilowaiskya Vialov, 1940
Imbricatoceras Holland, 1992
Imlayiceras
Imlayoceras Frebold, 1963
Inclytoceras Turek, 1976
Incuncus Engeser & Suthhof, 1992
Indocephalites Spath, 1928
Indoscaphites
Indosphinctes Spath, 1931
Indunoceras Wiedenmayer, 1977
Infabricaticeras Cobban, Hook & Kennedy, 1989
Inflaticeras Stieler, 1920
Infragarantiana Westermann, 1956
Infraparkinsonia Westermann, 1956
Infrapatoceras Ochoterena, 1966
Ingridella Wiedmann, 1960
Iniskinites Imlay, 1975
Intejoceratidae
Intoceratidae Kusina, 1971
Intranodites
Inversibactrites Barskov & Shimanskiy, 1994
Involuticeras Salfeld, 1913
Inyoceras Tozer, 1994
Inyoitidae Spath, 1934
Iowoceras
Iranodactylites Repin, 2000
Iranoknemiceras Collignon, 1983
Irenicoceras Warren & Stelck, 1958
Irianites Westermann & Getty, 1970
Irianoceras Kobayashi & Burton, 1971
Irinites Zhuravleva, 1972
Isculitidae Spath, 1951
Ishikariceras Matsumoto, 1965
Isohoplites Casey, 1954
Isotalassoceras Chen, 1983
Israelites Parnes, 1962
Isterites Barthel, 1975
Istycoceras Pavlov, 1967
Jacobites Kilian & Reboul, 1909
Janenschites
Jangziceras Lai, 1964
Janusites Bert & Delanoy, 2000
Japonitidae
Jaregoceras Zhuravleva, 1972
Jaspeiceras Groschke & Kossler, 1999
Jeannetia Collignon, 1958
Jeanneticeras Collignon, 1959
Jeannetites Collignon, 1960
Jeanrogericeras Wiedmann, 1960
Jeanthieuolyites
Jeanvogericeras
Jeminayceras Wang, 1983
Jiagouceras Chen & Tsou, 1979
Jialingjiangoceras Tsou, 1966
Jiangshanoceras Chen & Liu, 1976
Jiangxiceras Lai, 1980
Jimboiceras Shimizu, 1935
Jimenites
Jingshanlingoceras Zou, 1987
Joannitidae Mojsisovics, 1882
Joaquinites Anderson, 1958
Johnsonites Cobban, 1961
Joldagiroceras Myagkova, 1967
Jolinkia Waterhouse, 1996
Jordaniceras Bandel & Zeiss, 1987
Josticeras Vasícek & Klajmon, 1998
Jostwiedmannites Cooper, 1994
Jovellaniidae
Juaboceras Flower, 1968
Julianites Thieuloy, 1977
Juraphyllites Muller, 1939
Juraphyllitidae
Juvavitidae Tozer, 1971
Kachpurites Spath, 1924
Kadaroceras Zhuravleva, 1972
Kailiceras Chen & Liu, 1974
Kailuanoceras Obata, 1940
Kaipingoceras
Kakaria Waterhouse, 2001
Kalimantanites Schairer & Zeiss, 1992
Kallholnoceras Frye, 1987
Kalpinoceras Lai & Wang, 1981
Kammerkaroceras Lange, 1941
Kamptokephalites
Karaclymenla Bogoslovskiy, 1983
Karadzharoceras Zhuravleva, 1972
Karagandoceratidae
Karamaiceras Sokolov, 1967
Karamaites Sokolov, 1961
Karapadites Matsumoto, 1955
Karaschiceras
Kariceltites Jeannet, 1959
Karlwaageites Cooper, 1994
Karoceratidae
Kashmiritidae
Kashpurites
Kastanoceras Kennedy & Cobban, 1990
Katageioceras Zhuravleva, 1972
Katrolites
Kawashitaceras Matsumoto, 1984
Kawhiasphinctes Stevens, 1997
Kazakhoclymenia Bogoslovskij, 1979
Kedonoceras Dagis, 1968
Kelaenidae
Kellawaysia Bourquin, 1968
Kellawaysiceras Bourquin, 1968
Kellawaysites Buckman, 1925
Kennediella Cooper, 1979
Kentronites Zhuravleva, 1964
Kepingomites Chen, 1988
Kepplerites Neumayr, 1892
Keraiaceras Flower, 1964
Kerberites Buckman, 1924
Kerkoceras Chen & Liu, 1974
Keyserlingitidae Zacharov, 1970
Khagenoceras Zhuravleva, 1992
Khangsaria Waterhouse, 1996
Kheraiceras Spath, 1924
Kheraites Spath, 1925
Khvalynitidae Tozer, 1981
Kialagvikes Westermann, 1964
Kijoceras Zhuravleva, 1972
Kilianiceras Djanélidzé, 1922
Kilianites Enay, Boughdiri & Le Hegarat, 1998
Kinaschukoceras Nelson, 1963
Kinkeliniceras Buckman, 1921
Kinnekulloceras Kröger, 2004
Kionodeformoceras Li & Li, 1985
Kiotoceras Flower, 1971
Kirkyloceras Zhuravleva, 1987
Kirsoceratidae Korn, 2002
Kitatites Zhuravleva, 1972
Kitoceras Barskov, 1962
Kladiscoceras Zhuravleva, 1972
Kladisoceras
Klamathitidae
Klematosphinctes Buckman, 1922
Klingerella Cooper, 1999
Kobayashiceras Niko, 1998
Kobyashiceras
Kocaelia Fantini Sestini, 1990
Koenenia Haas, 1889
Koeneniceras Mikhailova & Baraboshin, 2002
Koenenitidae
Kohaticeras Fatmi & Holder, 1975
Koipatoceras Silberling & Nichols, 1982
Kolymites Repin, 1990
Kolymoceras Zhuravleva, 1995
Kolymophylloceras Repin, 1998
Koninckitoides Dagys & Ermakova, 1988
Kopetdagites Il'in, 1975
Kophinoceras Hyatt, 1884
Kordoceras Lai, 1982
Korythoceras Buckman, 1920
Kosmermoceras
Kosmoceratidae
Kosmoclymeniidae Korn & Price, 1987
Kosovoceras Turek, 1975
Kossmaticeratidae Spath, 1922
Kostromateuthis Doguzhaeva, 2000
Kotelnyoceras Balashov, 1975
Kotetishvilia Vermeulen, 1996
Koulabiceras Atabekyan, 1966
Kourazoceras Becker, 2002
Kozhimitidae
Krafftoceras Diener, 1903
Kranaosphinctes Buckman, 1921
Kubanoceras Kakhadze & Zesashvili, 1955
Kufengoceras Ruzhentzev, 1956
Kugeloceras Flower, 1968
Kulinnia Bogolepova, 1986
Kumaonites Jeannet, 1959
Kumatostephanus Buckman, 1922
Kummelonautilus Matsumoto, Miyauchi, Kanie, Miyata & Ueda, 1984
Kunlunoceras Da & Wang, 1980
Kuntziella Collignon, 1962
Kurnubiella Gill, Thierry & Tintant, 1985
Kutatissites Kakabadze, 1970
Kutekiceras Zeiss, 2001
Labeceratidae Spath, 1925
Labyrinthoceras Buckman, 1919
Laevispirus Venturi & Nannarone, 2002
Laganites Bogoslovsky, 1961
Lagonibelus Gustomesov, 1958
Laishuiceras Chen & Zou, 1980
Lambericeras
Lamellaptychus Trauth, 1927
Lamelloceras Erben, 1960
Lamellorthoceratidae
Lamnayella Wright & Kennedy, 1978
Lanceolitidae Spath, 1934
Lanceoptychites Balini, 1998
Langdaiceras Wang, 1983
Langyashanoceras Chen, 1983
Lanpingoceras Liang, 1977
Laqueoceras Lange, 1925
Laraiceras Renz, 1968
Larcheria Tintant, 1960
Lardaroceras Balini, 1992
Latanarcestidae Korn, 2001
Latemarites Brack & Rieber, 1993
Latitemnocheilus Sturgeon, Windle, Mapes & Hoare, 1982
Laugeites Spath, 1936
Lautihoplites Baraboshkin, 1996
Lecanitidae Hyatt, 1900
Lechritroceratidae
Lechritrochoceratidae
Lecointriceras Kennedy, Wright & Hancock, 1980
Leconteites Casey, 1954
Ledoceras Basse de Ménorval, 1963
Leeites
Lehmaniceras
Leiodistichites Tozer, 1994
Leiogastrioceras Yang, 1978
Lemfoerdiceras Kennedy, 1986
Lemuroceras Spath, 1942
Lemurostephanus Thieuloy, 1977
Lenobelus Gustomesov, 1966
Lenticeratidae
Leonardoceras Flower, 1968
Lepeniceras Rabrenovic, 1989
Lepiskites Dagis & Ermakova, 1990
Leptaleoceras Buckman, 1918
Leptechioceras Buckman, 1923
Lepthoplites Spath, 1925
Leptoceratoididae
Leptocheilus Till, 1908
Leptonotoceras Spath, 1925
Leptosphinctes Buckman, 1920
Leptotheuthididae
Leptotheuthis Meyer, 1834
Lessinieeras Pavia, Benetti & Minetti, 1987
Leukadiella Renz, 1912
Leurocycloceras Foerste, 1928
Leurocycloceratidae Sweet, 1964
Leuroplectoceras Flower, 1984
Levanticeras Lewy, 1983
Leymeriellidae Breistroffer, 1951
Lianghekouceras Xu & Lai, 1987
Libycoceratidae Zaborski, 1982
Lichuanoceras Xu, 1977
Lilangia Waterhouse, 1996
Lilastroemia Waterhouse, 1996
Lilloetia
Limaites Lisson, 1924
Limoxyites Westermann, 1958
Linchengoceras
Lingulaticeras Ziegler, 1958
Linibactrites Doguzhaeva, 2002
Linonautilus Zhou, 1979
Linstroemoceras
Linter Shimanskii, 1968
Linwuceras Xu, 1977
Lioceratoides Spath, 1919
Liofoceras Zhuravleva, 1983
Liosphinctes Buckman, 1905
Lioteuthididae
Liparoceratidae
Lipuites Jeannet, 1959
Lirometacoceras Zhao, Liang & Zheng, 1978
Liroxyites Imlay, 1961
Lissoceratidae
Lissoceratoides Spath, 1923
Lissogastrioceras Gordon, 1964
Lissonia Gerth, 1925
Lissonitidae
Lithancylus
Lituitidae
Liuchengoceratidae Zhao et al., 1978
Lobitidae Mojsisovics, 1882
Loboceras Histon, 1998
Lobocyclendoceras
Lobokosmokeras
Lobolytoceras Buckman, 1923
Lobosphinctes Buckman, 1923
Loczyceras Bourquin, 1968
Loligosepiidae
Lologosepiidae
Lomonossovella
Longaeviceras Buckman, 1918
Longibelemnopsis Riegraf, 1980
Longobarditidae Spath, 1951
Longoceras Repin, 2002
Longuncus Kulicki & Szaniawski, 1972
Longziceras Wang & He, 1981
Lopholobites Hyatt, 1900
Lopingoceras Shimansky, 1962
Loucheuxia Poulton, 1987
Lowoceratidae
Loxendoceras Collins, 1967
Loxoceras M'Coy, 1844
Lunanoceras Chen & Qi, 1979
Lupherites
Luppovia Kakabadze, Bogdanova & Mikhailova, 1978
Luppoviceras Sazonova, 1977
Lutuginoceras Popov, 1979
Lycetticeras Arkell, 1955
Lychnoceras Zhuravleva, 1974
Lyelliceratidae
Lymaniceras Matsumoto, 1965
Lymoceras Zhuravleva, 1979
Lytoceratidae
Lytoconites Wiedmann, 1970
Lytocrioceras Spath, 1924
Lytodiscoides Spath, 1922
Lytogyroceras Spath, 1925
Lytohoplites Spath, 1925
Lytospiroceras Patrulius, 1996
Maccarthyites Matsumoto, 1959
Machangoceras Yang, 1978
Maclayoceras Barskov, 1972
Macrocephalitidae
Macrophylloceras Spath, 1927
Macroscaphidae
Macroscaphitidae
Madagascarites Collignon, 1966
Maenioceratidae Bogoslovsky, 1958
Magdoceras Turek, 1976
Magharina Arkell, 1952
Magnacerina Kiselev, 1984
Magnapinnidae
Maideroceras Becker, 2002
Majoceras Zhuravleva, 1964
Majoceratidae
Malgaoceras Myagkova, 1967
Malladaites Linares & Sandoval, 1986
Maltoniceras Arkell, 1941
Mamagoueras Lai & Xu, 1983
Manchuroceratidae
Manchuroceroides Lai & Xu, 1983
Mancosiceras Cobban, 1964
Mandaloceratidae
Mangyshlakites Shevyrev, 1968
Manjoceras Zhuravleva, 1972
Manoloviceras Vasícek & Wiedmann, 1994
Manuaniceras Spath, 1925
Mapirites Leonova, 1983
Marathonitidae Ruzhencev, 1938
Marekites Kostak, 2002
Mariaceras Kolebaba, 1974
Martanites Venturi, 1997
Masiaposites
Masonites Henderson, 1970
Mastigophoridae
Matheronites Renngarten, 1926
Mathoceratites
Matsumotoceras van Hoepen, 1968
Matteiceras Wiedenmayer, 1980
Maxigoniatitidae Korn et al., 1999
Maximitidae Ruzhencev, 1960
Mayaites Spath, 1924
Mayneoceras Selwood, 1960
Mazapilites Burckhardt, 1910
Mazenoticeras Nikolov, 1966
Mecynoceratidae
Mediasiaceras II'in, 1975
Medioloboceras Kullman, 1962
Medjeziceras Busnardo & David, 1957
Medlicottiidae Karpinsky, 1889
Medvediceras Nikolayeva, 1967
Meekoceratidae Waagen, 1895
Megaceratites Balini, 1992
Megacrioceratidae
Megaloceras Zhuravleva, 1974
Megalytoceras Buckman, 1905
Megaphyllitidae Mojsisovics, 1896
Megasphaeroceras Imlay, 1961
Megatyloceras Humphrey, 1949
Meikeloceras Flower, 1971
Meitanoceras Chen & Liu, 1974
Meixianites Xu, 1977
Meixianlingites Qin, 1986
Melagathiceratidae Tozer, 1971
Melia Fischer, 1829
Melleia Herrmannsen, 1852
Mellia Fischer-Waldheim, 1844
Memmiella Vermeulen, 1998
Menabonites Housa, 1967
Meneghiniceras Hyatt, 1900
Menneroceras Andrianov, 1985
Menuthengonoceras Collignon, 1963
Mercaticeras Buckman, 1913
Mericoceras Zhuravleva, 1978
Merlaites
Merocycloceras Ristedt, 1969
Merzougites Klug, 2002
Mesaktoceras Wade, 1977
Mesiaposites Collignon, 1965
Mesoceratidae
Mesodactylites Pinna & Levi-Setti, 1971
Mesogaudryceras Spath, 1927
Mesoglyphioceras Pareyn, 1959
Mesohedenstroemia Chao, 1959
Mesohibolites Stolley, 1919
Mesohibolitidae Nerodenko, 1983
Mesokantoa Waterhouse, 1994
Mesoscaphites Atabekjan, 1979
Mesosimoceras Spath, 1925
Mesoteuthis Lissajous, 1915
Mesothinoceras Chen & Teichert, 1986
Mesoturrilites
Mesowutinoceras Chen, 1976
Mesoxyites Westermann, 1958
Metabelemnites Flower, 1944
Metacalycoceras Spath, 1926
Metacenoceras Tintant, 1984
Metactinoceras Zhuravleva, 1957
Metacymbites Spath, 1923
Metaderoceras Spath, 1925
Metagastrioceras Zhao, Liang & Zheng, 1978
Metagravesia Spath, 1931
Metahamites Spath, 1930
Metahaploceras Spath, 1925
Metahoplites Spath, 1924
Metajovelloceras Chen & Zou, 1987
Metalegoceratidae Plummer & Scott, 1937
Metallesmeroceras Flower, 1956
Metamorphites Kment, 2000
Metapatoceras Schindewolf, 1963
Metapeltoceras Spath, 1931
Metaptychoceras Spath, 1926
Metarnioceras Spath, 1925
Metasibiritidae Spath, 1951
Metatissotia Hyatt, 1903
Metoxynoticeras Spath, 1922
Metrioceras Zhuravleva, 1972
Metrolytoceras Buckman, 1923
Mezorulganites Andrianov, 1985
Miccocephalites Buckman, 1929
Michalskia
Michelinoceratidae
Micracanthoceras Spath, 1925
Microbeccus Shimanskiy & Nerodenko, 1983
Microbelus Gustomesov, 1958
Microberbericeras Geczy & Galacz, 1998
Microbiplices Arkell, 1936
Microceras Hyatt, 1867
Microdactylites Buckman, 1926
Microdesmoceras Matsumoto & Muramoto, 1972
Microdiphasoceras Cobban, Hook & Kennedy, 1989
Microlissoceras Sturani, 1971
Micromphalites Buckman, 1923
Micropoecilomorphus Sturani, 1971
Micropolyplectus Guex, 1973
Microstomiceras King, 1998
Microsulcatoceras Kennedy & Cobban, 1990
Microtoxalambites Sturani, 1971
Microwomiceras
Mikasaites Matsumoto, 1956
Miltoceras Wiedenmayer, 1980
Mimagoniatitidae Miller, 1938
Mimetoceras Zhuravleva, 1978
Mimobactrites Shimansky, 1991
Mimoceratidae Steinmann, 1890
Mimocycloceras Zhuravleva, 1964
Mimogeisonoceras Shimanskii, 1968
Mimolychnoceras Zhuravleva, 1974
Mimosphinctidae Erben, 1953
Minepronorites Nishida, Kyuma & Egashira, 1998
Mingyuexiaceras Zhao, Liang & Zheng, 1978
Miogaudryceras Matsumoto, 1995
Miotexanites Matsumoto, 1970
Mirabelobelus Janssen & Clement, 2002
Mirapelia Cooper, 1982
Miroclymenia Schindewolf, 1923
Mirosphinctes Schindewolf, 1926
Mithraxites Becker & House, 1994
Mitorthoceras Gordon, 1960
Mixosiphonocerina Chen, 1981
Miyakoceras Obata, 1967
Mizuhobaris Noda, Ogasawara & Nomura, 1986
Mjandymoceras Zhuravleva, 1972
Mnemoceras Zhuravleva, 1974
Mobergoceras Schmid & Ernst, 1975
Moffitites Imlay, 1959
Mogharaeceras Breistroffer, 1940
Mojarowskia Nikolaeva, 1956
Mojsisovicsiidae
Mojsisovicsteuthis Jeletzky, 1965
Mojsisoviczia
Molossus Montfort, 1808
Moneroceras Zhuravleva, 1996
Mongoceras Myagkova, 1967
Mongoloceratidae Ruzhencev & Bogoslovskaya, 1978
Mongolocertidae
Monofoveoceras Chen, 1981
Moravisphinctes
Moretella Collignon, 1963
Morphoceratidae
Morrisiceras Buckman, 1920
Morrisites van Hoepen, 1968
Mosquites Sazonova, 1971
Mossamedites Cooper, 2003
Mourreiceras Thomel, 1972
Mouterdeiceras Elmi & Rulleau, 1995
Moutoniceras
Mrhiliceras Kennedy & Wright, 1985
Mucrodactylites Buckman, 1927
Mucteoceras Myagkova, 1967
Muensterellidae
Muensteroceratidae Librovitch, 1957
Muensteroceratoides Popov, 1965
Mullerites Guex, 1980
Multisulcites Liang, 1983
Muniericeras Grossouvre, 1894
Muniericeratidae
Munsterella Scherill, 1950
Muramotoa Matsumoto, 1969
Muramotoceras Matsumoto, 1977
Murchisoniceras Babin, 1966
Murgabites Pavlov, 1967
Murphyella Matsumoto, 1972
Mutveiconites Doguzhaeva, 2002
Mycroceras Tryon, 1883
Mysterioceratidae
Mytarevia Zhuravleva, 1999
Naedyceratidae
Naefiteuthididae
Naefiteuthis Bandel, Reitner & Sturmer, 1983
Naivs
Najaceras Flower, 1971
Najaceratidae
Nanaimoteuthis Tanabe, 2008
Nanjingoceras Chen, 1983
Nannitidae Diener, 1897
Nannobelus Pavlov, 1913
Nannocardioceras Spath, 1935
Nannolytoceras Buckman, 1905
Nannolytoceratidae
Nannostephanus
Narthecoceratidae
Nathorstitidae Spath, 1951
Nautilida Agassiz, 1847
Navis Shimanskii, 1968
Nebroceras Zhuravleva, 1978
Nebrodites Burckhardt, 1910
Neimongoloceras Liang, 1976
Nejdia Arkell, 1952
Nektoceras Zhuravleva, 1974
Nelimenia Laporte, 1843
Nemertoceras Zou & Shen, 1984
Neobelemnella
Neobibolites
Neocalycoceras Thomel, 1969
Neocampylites Callomon, 1973
Neocardioceras Spath, 1926
Neoceras Myagkova, 1967
Neoclavibelus Riegraf, 1980
Neoclavinautilus Liang, 1984
Neocomitidae Salfeld, 1921
Neocosmoceras Blanchet, 1924
Neocyrtochilus Anderson, 1958
Neodimorphoceratidae Furnish & Knapp, 1966
Neodiscosorus Schindewolf, 1944
Neoeburoceras Xu & Lai, 1983
Neoemaciaticeras Cantaluppi, 1970
Neoepigoniceras Shimizu, 1935
Neofuciniceras Cantaluppi, 1970
Neogastrioceras Nassichuk, 1975
Neogauthiericeras
Neoglochiceras Patrulius & Avram, 1976
Neoglyphioceratidae Plummer & Scott, 1937
Neoglytoxoceras
Neograhamites Spath, 1953
Neogymnites Waterhouse, 2002
Neohamites Brunnschweiler, 1966
Neoharpoceras Spath, 1921
Neohibolitoides Alizade, 1964
Neoicoceratidae Hyatt, 1900
Neokaipingoceras Obata, 1940
Neokentoceras
Neokeyserlingites Waterhouse, 1999
Neolioceratoides
Neolioceratoldes Cantaluppi, 1970
Neoluppovella Baraboshkin & Mikhailova, 2000
Neomantelliceras Thomel, 1972
Neomicroceras Donovan, 1966
Neomorphoceras Arkell, 1953
Neomphaloceras Matsumoto & Obata, 1982
Neopachydiscus Yabe & Shimizu, 1926
Neoparoniceras Rulleau, Becaud & Neige, 2003
Neophyllites Lange, 1941
Neophylloceras
Neopolyptychites Schulgina, 1983
Neoprotogrammoceras Cantaluppi, 1970
Neopulchellia Collignon, 1929
Neopuzosia Matsumoto, 1954
Neosaynoceras Breistroffer, 1947
Neoselwynoceras Collignon, 1966
Neosichuanoceras Chen & Liu, 1974
Neosilesites
Neostacheoceratidae Toumansky, 1939
Neostenopoceras Zhao, Liang & Zheng, 1978
Neotainoceras Zhao, Liang & Zheng, 1978
Neotollia Saks & Shulgina, 1969
Neoturrilites Shimizu, 1935
Nephriticeratidae
Nepirrites Leonova, 1983
Netton Gistl, 1848
Neumannia Glowniak, 2002
Neuqueniceras Stehn, 1924
Nevadaceras Flower, 1968
Nevadaphyllites Guex, 1980
Nevadisculites Bucher, 1988
Nevadophyllites
Newmarracarroceras Hall, 1989
Nicholsites Bucher, 1992
Nicklesiella Bürgl, 1956
Nilgiria Waterhouse, 1996
Nilssonoceras Kröger, 2004
Ninkiangoceras Lai, 1965
Nipageroceras Zhuravleva, 1972
Nipponololigo Natsukari, 1983
Nissoceras Zhuravleva, 1979
Nodicoeloceras Buckman, 1926
Nodiferites Westermann, 1958
Nodiocoeloceras Dacqué, 1934
Nodonautilus Liang, 1984
Nodopleuroceras Zheng, 1984
Nodosohoplites
Nolaniceras Casey, 1961
Nomismoceratidae Librovitch, 1957
Nonyaniceras Klinger & Kennedy, 1977
Nordiceratidae
Noridiscitidae Spath, 1951
Noritidae
Noritidea
Norosirenites Tozer, 1994
Noskytes Scholz, 1979
Nostoceratidae Hyatt, 1894
Nostroceras
Nothocephalites Spath, 1928
Nothoceratidae
Nothocerina Barskov, 1972
Nothodiscus Collignon, 1962
Nothokionoceras Chen, 1981
Nothostephanus
Novoleonites Chapa, 1992
Nozemoceras Zhuravleva, 1996
Nubidites Wiedmann & Kullmann, 1979
Nucites Zhuravleva, 1972
Nucleoceras Kolebaba, 1999
Nuratocerus Zhuravleva, 1992
Nutropites Guo, 1984
Nyalamoceras Wang, 1976
Obliocycloceras Chen, 1981
Obliocycloceroides Chen, 1981
Obrutchevites Vavilov, 1977
Obsoleticeras Bogdanova & Michailova, 1999
Obsoletosphinctes Beznosov, 1981
Obtusicostites Buckman, 1921
Ochotoceras
Octopoda Leach, 1818
Odoghertyceras Guex, Taylor, Rakus & Bucher, 1998
Odontoceras Steuer, 1897
Odontodiscoceras Spath, 1924
Oecoptychiidae
Oecotraustes Waagen, 1869
Oekotraustes Waagen, 1869
Offleyoceratidae
Ohioceras Shimizu & Obata, 1935
Oiophyllites Spath, 1953
Oistoceras Buckman, 1911
Ojianagiceras Cobban & Kennedy, 1989
Okribites Kakhadze, 1937
Olcostephanidae
Olenecoceras Balashov, 1966
Olenekoceras Dagys & Ermakova, 1986
Olenikitidae Tozer, 1971
Oligocadoceras Meledina, 1977
Oligoceras Zhuravleva, 1974
Oligosella Ciampaglio & Weaver, 2008
Ommatostrephidae
Omnutaxoceras Bogolepova, 1986
Oncoceratidae Hyatt, 1884
Onychoceras Wunstorf, 1905
Onyxites Zhuravleva, 1972
Oonendoceras Chen & Qi, 1982
Oonoceratidae
Oosterellidae
Ophiceltites Tatzreiter, 1981
Ophiceratidae
Ophidioceratidae
Ophidoceratidae
Ophioceratidae Arthaber
Oppeliidae Bonarelli, 1894
Opuatia Westermann, 2000
Oraniceras Flamand, 1911
Oratoceras Zhuravleva, 1964
Orbignybelus Gustomesov, 1977
Orbobactrites Mapes, 1979
Oregoniceras Anderson, 1958
Oregonites Wiedenmayer, 1980
Orestites Renz, 1911
Organoceras Myczynski, 1976
Orionoides Spath, 1931
Ormoceratidae Saeman
Ornicephalites Skwarko & Thieuloy, 1989
Orthaspidoceras Spath, 1925
Orthildaites Buckman, 1923
Orthoarmenoceras Kisselev, 1990
Orthoceratidae
Orthocycloceras Barskov, 1972
Orthodochmioceras Chen, 1981
Orthogarantiana Bentz, 1928
Orulganitidae Ruzhencev, 1965
Oshimaceras Obata & Futakami, 1992
Osperleioceras Krimholz & Tazikhin, 1957
Osperlioceras
Ostenoteuthidae
Otiosphinctes Besnosov, 1982
Otoarpadites Tozer, 1994
Otoceratidae Hyatt, 1900
Otoitidae
Otoscaphites
Otosphinctes Beznosov, 1981
Otoxyites Westermann, 1958
Ottohaasites Cooper, 1998
Ovaliconcha Waterhouse, 1996
Ovaticeras Buckman, 1918
Ovobactrites Doguzhaeva, 2002
Oxycerites Rollier, 1909
Oxydiscites Rollier, 1909
Oxydiscoceras Venturi & Nannarone, 2003
Oxydiscus Venturi & Nannarone, 2002
Oxylenticeras
Oxynoticeratidae
Oxynoticeroides Dommergues, Faure & Peybernes, 1986
Oxyparoniceras Guex, 1974
Oxysphinctes Beznosov, 1981
Oxyteuthididae
Oxyteuthis Stolley, 1911
Pachtoceras Foerste, 1926
Pachybelemnella Schulz, 1979
Pachybelemnopsis Riegraf, 1980
Pachycardioceras Buckman, 1926
Pachycephalites Meledina, 1973
Pachyceratidae
Pachyclymeniidae Korn, 1992
Pachydiscidae Spath, 1922
Pachydiscoides Spath, 1922
Pachyduvalia Riegraf, 1981
Pachyerymnoceras
Pachygrycia Jeletzky & Stelck, 1981
Pachyhemihoplites Delanoy, 1992
Pachypictonia
Pachypraetollia Alekseev, 1984
Pachysphinctes Dietrich, 1925
Pachyteuthis Bayle, 1878
Pachytornquistes Thierry & Charpy, 1982
Padagrosites
Padragosiceras
Padunoceratidae
Pakrioceras Stumbur & Mutvei, 1983
Palaeobelemnopsidae
Palaeobelemnopsis Chen & Sun, 1982
Palaeocyclendoceras
Palaeocycloceras Shimizu & Obata, 1936
Palaeololiginidae
Palaeonoricoceras d'Aversa, 1983
Palaeonothoceras Barskov, Kisselev & Starshinin, 1986
Palaeophyllitidae
Palaeospyroceras Chen, 1981
Palaeoteuthis d'Orbigny, 1850
Paleocadmus Solem & Richardson, 1975
Palicitidae
Palmeroceras Flower, 1936
Palnerostephanus
Paltaopites
Paltechioceras Buckman, 1924
Pamiropopanoceras Leonova, 1989
Pancornus Zhuravleva, 1972
Pantoioceras Zhuravleva, 1972
Panxianoceras Yang, 1978
Paraacrochordiceras
Parabactritidae
Parabehavites
Parabelemnopsis Howlett, 1989
Paraberriasella Donze, 1948
Parabevalites
Parabigotites Imlay, 1961
Parabinneyites Leanza, 1964
Paraboliceras Uhlig, 1910
Paraboliceratoides Spath, 1925
Parabrachybelus Riegraf, 1980
Paraburroceras Cobban, Hook & Kennedy, 1989
Paracadoceras Crickmay, 1930
Paracalycoceras
Paracassinoceras Zhu & Li, 2000
Paraceltitidae Tozer, 1981
Paracheloniceras Collignon, 1962
Parachoffatia Mangold, 1971
Parachondroceras Imlay, 1967
Paraclitendoceras Lai & Xu, 1987
Paraconlinoceras Kennedy & Cobban, 1990
Paraconocerina Xu & Lai, 1983
Paracoreanoceras Lai & Xu, 1987
Paracorniceras
Paractinocamax Naidin, 1963
Paracuariceras Schindewolf, 1963
Paracyclendoceras
Paracymbites Trueman & Williams, 1927
Paradadyceras Cossmann, 1901
Paradakeoceras Flower, 1964
Paradasyceras Spath, 1923
Paradeshayesites Kemper, 1967
Paradicidia
Paradiscamphiceras Taylor, 1988
Paradiscoceras Barskov, 1972
Paradnatoceras Chen & Liu, 1974
Paradolphia
Paraeburoceras Xu & Lai, 1983
Paraenoploteuthis Tsuchiya & Okutani, 1988
Parafayettevillea Yang, 1986
Paraganitidae
Paragarantiana Gauthier, 2003
Paragastrioceratidae Ruzhencev, 1951
Paragastroplites Imlay, 1961
Paraglochiceras Collignon, 1959
Paraglyphiteuthis Kostak, 2002
Parahastites
Parahelenites Chen & Liu, 1974
Parahibolites Stolley, 1919
Parahildaites Blaison, 1967
Parahoplitidae Spath, 1922
Parahuaiheceras Xu & Lai, 1983
Parahyperderoceras Schlatter, 1980
Paraidoceras Raymond Enay, 1992
Paraimerites Kakabadze, 1967
Parakeratinites Zeiss, 1968
Parakilianella Sato, 1961
Parakogenoceras Chen, 1984
Parakufengoceras Leonova, 2002
Paralambeoceras Li, 1988
Paralcidia Spath, 1928
Paralenticeras Hyatt, 1900
Paraleptoceras Leanza, 1970
Paralingulaticeras Ziegler, 1958
Paramadiganella Stait, 1984
Paramecynoceras Zhuravleva, 1972
Paramedlicottia Leonova, 1992
Paramegateuthis Ghustomesov, 1960
Paramicroderoceras Dommergu, Ferretti & Meister, 1994
Paramixosiphonoceras Tsou, 1966
Parammatoceras Buckman, 1925
Paramooreoceras Zhuravleva, 1978
Paranannitidae Spath, 1930
Paranclyoceras
Paranoritidae Spath, 1930
Paranothoceras Zhuravleva, 1990
Paranowakia Boucek, 1966
Parapalaeoceras Li, 1984
Parapallasiceras Spath, 1925
Parapassaloteuthis Riegraf, 1980
Parapeltoceras Schindewolf, 1925
Paraperrinites
Paraphragmitidae
Paraplectoceras Flower, 1984
Paraplectronoceras Chen, Qi & Chen, 1979
Parapopanoceratidae Tozer, 1971
Pararasenia Spath, 1925
Parareineckeia Imlay, 1962
Pararetroclitendoceras Lai & Xu, 1983
Pararnioceras Spath, 1922
Parashumarditidae Boardman et al., 1994
Parasicanites Leonova, 1985
Parasilesites Imlay, 1959
Parasolenoceras
Parasphaerorthoceras Ristedt, 1969
Paraspidoceras Spath, 1925
Paraspiticeras Kilian, 1910
Parastantonoceras Collignon, 1965
Parasteroceras Dommergues, Faure & Peybernes, 1986
Parastieria Spath, 1923
Parastreblites Donze & Enay, 1961
Parastrenoceras Ochoterena, 1963
Paratainoceras Qin, 1986
Paratainonautilus Zhao, Liang & Zheng, 1978
Parathisbitidae
Parathurmannia Busnardo, Charollais, Weidmann & Clavel, 2003
Paratibites
Paratissotia Hyatt, 1903
Paratrematoceras Schastlivtseva, 1981
Paratrifurcatoceras Lai, 1985
Paratumaroceras Kutygin, 2003
Paratunkuskoceras Zhu & Li, 1996
Parauloceratidae Manda & Turek, 2009
Paravaginoceras Kobayashi, 1934
Paravalhallites Shimansky, 1990
Paraverneuilites Popov, 1979
Paravirgatites Buckman, 1922
Parawedekindia Schindewolf, 1925
Parawestonoceras Zhuravleva, 1972
Parawocklumeriidae Schindewolf, 1937
Parazurcheria Fernandez-Lopez, Mouterde & Rocha, 1988
Parentitidae
Parevlanoceras Zhuravleva, 1972
Parinaia Sestini, 1994
Parinodiceras Trueman, 1918
Parinyoites Popov, 1962
Parisculites Tozer, 1994
Parkinsoniidae
Parodoceratidae Petter, 1959
Parodontoceras Spath, 1923
Paroecotraustes Spath, 1928
Paroligoceras Zhuravleva, 2000
Paroniceras Bonarelli, 1893
Paronychoceras Guex, 2000
Paroxynoticeras Pia, 1914
Paryphoceras Spath, 1928
Pascoeites Spath, 1933
Paskentites Imlay & Jones, 1970
Passaloceras Zhuravleva, 1978
Passaloteuthidae Naef, 1922
Passaloteuthis Lissajous, 1915
Passendorferia Brochwicz-Lewinski, 1973
Patagonibelus Aguirre-Urreta & Doyle, 1989
Patagoniceras Wetzel, 1960
Patieoceras Lamont, 1978
Patrulia Sturani, 1971
Patruliusiceras
Paviaites Cresta, 1997
Pavloviceras Buckman, 1920
Pavlovites Ivanov & Aristov, 1969
Pavloviteuthis Shimansky, 1957
Pearceiteuthis Hewitt & Jagt, 1999
Pearloceras Chen & Wen, 1987
Pectinatites Buckman, 1922
Pedanochonoceras Chen, 1981
Peeloceras Flower, 1979
Pegnaceras Chappa, 1962
Pelagoceras Zhuravleva, 1972
Peltoceratoides Spath, 1924
Peltolytoceras Spath, 1924
Peltomorphites Buckman, 1925
Pengzeceras Chen, 1983
Penhsioceras Endo, 1932
Peratobelus Whitehouse, 1924
Percacosticeras Kiselev, 1996
Pericyclidae Hyatt, 1900
Pericycloceras Zhao & Zheng, 1977
Pericycloceratidae
Perilytoceras Rulleau, 1997
Peripatoceras Li & Li, 1985
Perisphincidae
Perisphinctidae
Perkinsoceras Flower, 1976
Permorhynchus Zakharov, 1983
Peroniceratidae
Perrimetanites Leonova, 1983
Perrinitidae Miller & Furnish, 1940
Petitclercia Rollier, 1909
Petrolytoceras
Petryoceras Flower, 1939
Petteroceratidae Becker & House, 1993
Pfefferiteuthis Tsuchiya & Okutani, 1988
Phanerostephanus
Pharciceratidae Hyatt, 1900
Pharetroceras Zhuravleva, 1999
Phaularpites Buckman, 1928
Phaulostephanus Buckman, 1927
Phaulozigzag Buckman, 1926
Phenacoceratidae Wedekind, 1918
Phillipsibelus Gustomesov, 1977
Phlycticeras Hyatt, 1900
Phlycticrioceratidae Spath, 1926
Phlyseogrammocera
Phlyseogrammoceras Buckman, 1902
Phragmoceratidae
Phragmoteuthididae
Phragmoteuthis Mojsisovics, 1882
Phricodoceratidae
Phthanoncoceratidae
Phukungia Waterhouse, 1999
Phylloceratidae Zittel, 1884
Phyllopachceras
Phylloptychoceras Spath, 1953
Phyllosphaerites Shevyrev, 1995
Phymatoceratidae
Physeogrammoceras
Physioceras Zhuravleva, 1972
Picardiceras Parnes, 1986
Pictonia Bayle, 1878
Pictorthoceras Lamont, 1978
Piestoocerina Chen, 1981
Pijaconcha Waterhouse, 1996
Piloceratidae
Pimelites Fucini, 1896
Pinacitidae Hyatt, 1900
Pinaclymenia
Pinacoceratidae Mojsisovics, 1879
Pingquanoceras Lai, 1985
Piriclymeniidae Korn, 1992
Pisaites Balini, 1992
Pistrixites Shimanskii, 1968
Placenticeratidae Hyatt, 1900
Placentoscaphites Chiplonkar & Ghare, 1977
Plagioceras Zhuravleva, 1972
Plagiocycloceras Zhuravleva, 1978
Planammatoceras Buckman, 1922
Planibactrites Beck, 1993
Planibulliceras Baraboschkin & Michailova, 1994
Planisphinctes Buckman, 1922
Planites de Haan, 1825
Planostoceras Lewy, 1967
Plasmatoceras Buckman, 1925
Platophrenoceras Zou & Shen, 1984
Platychamoussetia Repin, 2002
Platyclymeniidae Wedekind, 1914
Platycomeroceras Chen, 1981
Platyconoceras Zhuravleva, 1972
Platycuccoceras Bucher, 1988
Platylenticeras Hyatt, 1900
Platylongoceras Repin, 2002
Platynoticeras Spath, 1938
Platyphylloceras Repin, 1998
Platyscaphites Cobban, Kennedy & Landman, 1999
Platysmoceras Chen, 1981
Platysphinctes Tintant, 1960
Platystrophites Levi-Setti & Pinna, 1971
Plectoceratidae Hyatt
Plectolites Flower, 1968
Plectronoceratidae
Pleonoceras Zhuravleva, 1978
Plesiacanthoceratoides Kennedy & Cobban, 1990
Plesiacanthoides
Plesiohamites Breistroffer, 1947
Plesiorizosceras Chen, 1981
Plesioteuthididae
Plesiotissotia Péron, 1897
Plesioturrilites
Pleuroacanthites Canavari, 1883
Pleuroacanthitidae
Pleurobelus Naef, 1922
Pleurofrechites Tozer, 1994
Pleurolytoceras Hyatt, 1900
Pleuronodoceratidae Zhao et al., 1978
Pleuropsiloceras Guex, Taylor, Rakus & Bucher, 1998
Pleurotexanites Matsumoto, 1970
Plicatoceras Niko, 1991
Plictetia
Pochialayniceras Alabushev & Alabusheva, 1988
Poculisphinctes Buckman, 1920
Podagrosiceras Maubeuge & Lambert, 1956
Podagrosites Guex, 1973
Podoliceras
Pohlsepia Kluessendorf & Doyle, 2000
Polyaspidoceras Matsumoto, Kawashita, Fujishima & Miyauchi, 1978
Polydesmiidae
Polyelasmoceratidae
Polygonalia Ali-zade, 1965
Polymorphitidae
Polyplectites Mascke, 1907
Polyplectus Buckman, 1890
Polysphinctes
Pomerania Arkell, 1937
Pompeckioceras Spath, 1925
Pomphoceras Zou & Shen, 1984
Ponticeratidae
Popanites Rollier, 1909
Popanoceratidae Hyatt, 1900
Poporites
Porpoceras Buckman, 1911
Posttornoceratidae Bogoslovsky, 1962
Poterioceratidae
Pradoceras
Praeactinocamax Naidin, 1963
Praeataxioceras Atrops, 1982
Praebigotites Wetzel, 1936
Praechetaites Sasonova & Sasonov, 1979
Praeconobelus Gustomesov, 1977
Praeczekanowskites Dagys, 1998
Praeglyphioceratidae Ruzhencev, 1957
Praegravesia Fischer & Zeiss, 1987
Praeidoceras Collignon, 1959
Praeleptosphinctes Westermann, 1956
Praemanambolites
Praemercaticeras Venturi, 1981
Praemuniericeras Collignon, 1966
Praenegreliceras Collignon, 1960
Praeoppelia Westermann, 1969
Praeoxyteuthis Mutterlose, 1980
Praepachyteuthis Gustomesov, 1977
Praeparkinsonia Schmidtill & Krumbeck, 1931
Praepinacoceras Fantini Sestini, 1992
Praepolyplectus Venturi, 1981
Praerycites Venturi, 1981
Praeschloenbachia Scholz, 1973
Praesibirites Dagys & Ermakova, 1988
Praesphaeroceras Levi, 1896
Praestrigites Buckman, 1924
Praesurites Mesezhnikov & Alekseev, 1983
Praetollia Spath, 1952
Praetulites Westermann, 1956
Pravitoceras Yabe, 1901
Prejuvenites Waterhouse, 1996
Presimoceras
Prevalia Stephanov, 1972
Primoryites Khudolei, 1960
Prionitidae Hyatt, 1900
Prionoceratidae Korn et al., 2003
Proacrochordiceras Korchinskaya, 1983
Proarnioceras Blind, 1963
Proaustraliceras Kakabadze, 1977
Probatoceras Zhuravleva, 1978
Procarnitidae Zhao, 1959
Procarnitoides Dagys & Ermakova, 1995
Procerites Siemiradzki, 1898
Procerozigzag Arkell, 1953
Procliviceras Fucini, 1920
Procolombiceras Sharikadze, 1979
Procraspedites Spath, 1930
Prodeshayesites Casey, 1961
Prodromitidae Arthaber, 1911
Proeucalycoceras Thomel, 1969
Progalbanites Spath, 1936
Progeronia Arkell, 1953
Prographularia Frech, 1890
Prograyiceras Spath, 1928
Prohauericeras Nowak, 1913
Prohecticoceras Spath, 1928
Prohelicoceras Spath, 1925
Prolecanitidae Korn et al., 2003
Proleopoldia Spath, 1923
Proleymeriella Breistroffer, 1947
Prolobitidae Wedekind, 1913
Promantelliceras Thomel, 1972
Pronajaceras Lai & Xu, 1983
Proniceras Burckhardt, 1919
Pronjaites Sazonova, 1971
Pronoritidae Frech, 1901
Propassaloteuthis Riegraf, 1980
Propectinatites Cope, 1968
Properisphinctes Spath, 1931
Prophlycticrioceras Clark, 1965
Propinacoceratidae Plummer & Scott, 1937
Proplanulites Teisseyre, 1887
Propolyptychites Kemper, 1964
Proptychitidae Waagen, 1895
Prorasenia Schindewolf, 1925
Prorjasanites Sazonova, 1977
Proromaniceras Wiedmann, 1960
Prorsisphinctes
Prosaphites
Prosiceras
Prosoceras Xu & Lai, 1987
Prososphinctes
Prososphinctoides Spath, 1928
Prosphingitidae
Protacanthoceras Spath, 1923
Protacanthodiscus Spath, 1923
Protacanthoplites Tovbina, 1970
Protaconeceras
Protactinoceratidae
Protactoceratidae
Protanclyoceras
Protancyloceratidae
Proteoceratidae Flower
Proterocameroceratidae
Proterocamerocerina Chen & Zou, 1980
Protetragonitidae
Proteusitidae Spath, 1951
Protoarieticeras Cantaluppi, 1970
Protoaulacoceras Bandel, Reitner & Sturmer, 1983
Protoaulacoceratidae
Protobactrites Hyatt, 1900
Protobaculites Collignon, 1964
Protocardioceras Schirardin, 1958
Protoceras
Protocyclendoceras
Protocycloceratidae
Protoecotrausites
Protogrammoceras Spath, 1913
Protokossmaticeras Collignon, 1964
Protoleptoceras Nikolov, 1966
Protophites Ebray, 1860
Protopites Lemoine, 1912
Protosageceras
Protostromatoceras Lai, 1982
Protothurmannia Crickmay, 1932
Provalanginites Fatmi, 1972
Provampyroteuthis Kanie, 1998
Provascoceras Cooper, 1979
Psamateiceras Tatzreiter, 1985
Pseudacanthoceras Thomel, 1972
Pseudacompsoceras Spath, 1925
Pseudacrochrodiceras Tozer, 1994
Pseudaetomoceras Spath, 1923
Pseudammatoceras Elmi, 1963
Pseudancistroceras
Pseudargentiniceras Spath, 1925
Pseudarietitidae
Pseudarisphinctes Arkell, 1935
Pseudemilites Leonova, 1988
Pseudendoceras Chen & Zou, 1979
Pseudhimalayites Spath, 1925
Pseudhypoturrilites Cooper, 1999
Pseudinvoluticeras Spath, 1925
Pseudisculites Wang & He, 1976
Pseudoaganides
Pseudoamaltheus Frebold, 1922
Pseudoancistroceras Xu & Lai, 1987
Pseudoarieticeras Cantaluppi, 1970
Pseudobarroisiceras Shimizu, 1932
Pseudobelus Blainville, 1827
Pseudobolloceras Zhuravleva, 1972
Pseudobrevicoceras Zhuravleva, 1974
Pseudobrightia Spath, 1928
Pseudobrodieia Guex, 1972
Pseudocadoceras Buckman, 1918
Pseudocalycoceras Thomel, 1969
Pseudocidoceras Westermann, 1969
Pseudoclambites Spath, 1925
Pseudoclydoniceras Collignon, 1958
Pseudoclymeniidae
Pseudocosmoceras Mourachkine, 1930
Pseudocycloceras Barskov, 1959
Pseudodeiroceras Chen & Zou, 1987
Pseudodicoelites
Pseudodicoelitidae
Pseudodimorphinites Seyed-Emami, 1989
Pseudoectenolites Xu & Lai, 1983
Pseudofavrella Leanza & Leanza, 1973
Pseudoforresteria Iliin & Khakimov, 1984
Pseudogarantiana Bentz, 1928
Pseudogargasiceras Collignon, 1962
Pseudogarnieria Spath, 1923
Pseudogastroplites Jeletzky, 1980
Pseudoglaphyrites Ruzhentzev & Bogoslovskaya, 1971
Pseudogrammoceras Buckman, 1901
Pseudogregoryceras Jeannet, 1951
Pseudohaloritidae Ruzhencev, 1957
Pseudohastites Naef, 1922
Pseudohatchericeras Leanza, 1970
Pseudohedenstroemia Kummel, 1957
Pseudohollandites Krystyn & Tatzreiter, 1991
Pseudoinvoluticeras
Pseudojacobites Spath, 1922
Pseudokatroliceras
Pseudokeyserlingites Bucher, 1989
Pseudokionoceras Zhuravleva, 1978
Pseudoleymeriella
Pseudolillia Maubeuge, 1949
Pseudolissoceras Spath, 1925
Pseudoliulinoceras Zou & Shen, 1984
Pseudomantelliceras Thomel, 1972
Pseudomercaticeras Merla, 1933
Pseudomicromphalites Collignon, 1967
Pseudomoutoniceras Autran, Delanoy & Thomel, 1986
Pseudoneuqueniceras Riccardi & Westermann, 1991
Pseudoocerina Lai & Xu, 1983
Pseudoonoceras Turner, 1966
Pseudoparalegoceratidae Librovitch, 1957
Pseudopeltoceras Spath, 1928
Pseudoperisphinctes Schindewolf, 1925
Pseudophragmoceras Lai, 1981
Pseudophylloceras Beznosov, 1957
Pseudoplacenticeras Spath, 1926
Pseudopliendoceras Lai & Xu, 1987
Pseudopolyplectus Mattei, 1969
Pseudopomerania Wright, 1996
Pseudoppelia
Pseudoprosphingites Shevyrev, 1995
Pseudopulchellia Imlay, 1961
Pseudopuzosia Spath, 1926
Pseudorizoceras Lai, 1981
Pseudorthoceratidae Flower & Caster, 1935
Pseudorthosphinctes Enay, 1966
Pseudosaynella Spath, 1923
Pseudoshasticrioceras Delanoy, 1998
Pseudosimoceras Spath, 1925
Pseudoskirroceras Wiedenmayer, 1980
Pseudosvalbardiceras Dagys & Ermakova, 1988
Pseudotemperoceras Stschastlivtseva, 1986
Pseudotetragonites Drushchitz, 1956
Pseudothisbites He, 1985
Pseudotibetites Jeannet, 1958
Pseudotirolitidae Zhao, 1965
Pseudotissotiidae
Pseudotoites
Pseudotorrensia Parnes, 1988
Pseudotropites Wähner, 1894
Pseudovalcouroceras Lai, 1981
Pseudovaldedorsella Cecca, Faraoni & Marini, 1998
Pseudovascoceras Zaborski, 1996
Pseudovirgatites Vetters, 1905
Pseudowaagenia Spath, 1931
Pseudowenites Chao, 1959
Pseudowutinoceras Chen, 1984
Pseuduptonia
Psilechioceras Erben, 1956
Psiloceratidae Hyatt, 1867
Psilohamites Spath, 1941
Psilophyllites Spath, 1914
Psilorthoceras Ristedt, 1969
Psilotissotia Hyatt, 1900
Psuedorthoceratidae
Pteroconites Zhuravleva, 1996
Pteropuzosia Matsumoto, 1988
Pteroscaphites
Ptychitidae Mojsisovics, 1882
Ptychoceratidae Meek, 1876
Ptycholytoceras Spath, 1927
Puchenquia Westermann & Riccardi, 1972
Puebliceras Cantu Chapa, 1993
Puebloites
Puezalpella Dimitrova, 1967
Pulchellia Uhlig, 1882
Pulchelliidae Hyatt, 1903
Purmamarcoceras Cecioni, 1965
Purmanarcoceras
Putealiceras Buckman, 1922
Puzosigella Casey, 1954
Pygmabralia Nesis & Nikitina, 1987
Pygmaeoceras Gordon, 1960
Pyramidoceras Zhuravleva, 1974
Pythonoceras Zhuravleva, 1978
Qilianshanites Wu, 1983
Qinhuangdaoceras Cheng, 2000
Qiulitagocerus Lai & Wang, 1981
Qiushougouceras
Qiushugouceras Jun-Yuan & Teichert, 1983
Quasidicoelites Gustomesov, 1977
Quasihastites Gustomesov, 1977
Queenslandoceras Mikesh, 1968
Quiricobelus Combemorel & Mariotti, 1986
Quitmannites
Rachiteuthis Novati, 2002
Radioceras Waterhouse, 1996
Radnoroceras Holland, 1992
Radoceras Zhuravleva, 1972
Radstockiceras Buckman, 1918
Raimondiceras Spath, 1924
Rakusites Guex, 1971
Ramositidae Ruzhencev & Bogoslovskaya, 1969
Ramussenoceras
Rangeroceratidae
Raoceras Ayyasami, 1993
Raphanites Zhuravleva, 1972
Raphibelus Naef, 1922
Raphiceras Zhuravleva, 1978
Rapidoplacenticeras Alabushev, 1988
Rarecostites Beznosov & Kutuzova, 1982
Rarenodia Venturi, 1976
Rasenia Salfeld, 1913
Rasenoides
Rauracoceras Maubeuge, 1962
Raynaudia Dubourdieu, 1953
Reboulites Dimitrova, 1967
Rectanguloceras Stumbur, 1962
Rectimitoceras Becker, 1996
Rectoclymeniidae Schindewolf, 1923
Rectseptoceras Tsou & Chen, 1979
Recurvoceras Xu & Lai, 1987
Recurvoceroides Xu & Lai, 1987
Redpathoceras Flower, 1963
Rehmannia Schirardin, 1956
Reineckeiidae
Reineckeites Buckman, 1924
Reitziites Brack & Rieber, 1993
Rencurelites Thieuloy, 1964
Reniceras Lai & Xu, 1987
Renziceras Arkell, 1953
Renziella Kvantaliani, 1980
Renzinautilus Engeser, 1995
Reticuloceratidae Librovitch, 1957
Retiogastrioceras Zhao, Liang & Zheng, 1978
Retowskiceras Nikolov, 1966
Retrotornoceras House, 2002
Revilites Casey, 1978
Reymentites Matsumoto, 1965
Reymentoceras Wiedmann, 1960
Reynesoceras
Reynesocoeloceras Geczy, 1976
Rhabdiferous
Rhabdites Zhuravleva, 1978
Rhabdobelus Naef, 1922
Rhabdoceratidae Tozer, 1979
Rhampidoceras
Rhiphaeoteuthidae
Rhipsites Zhuravleva, 1978
Rhodaniceras Elmi, 1963
Rhomboteuthis Fischer & Riou, 1982
Rhopaloteuthis Lissajous, 1915
Rhymmoceratidae Ruzhencev & Bogoslovskaya, 1971
Rhyncheolithus Menke, 1830
Rhynchocameratus Renz, 1978
Rhynchoceras Zhuravleva, 1972
Rhyncholite
Rhyncholites Merian, 1835
Rhyncholithes Blainville, 1827
Rhyncholithus Bronn, 1835
Rhynchorthoceras Remelé, 1881
Rhyncolites Faure-Biguet, 1819
Rhyoptychoceras Matsumoto, 1977
Rhytidohoplites
Riasanites Spath, 1923
Riccardiceras Westermann, 1995
Richmondoceras Frey, 1995
Rimkinitidae Wang & He, 1976
Ringsteadia Salfeld, 1913
Ripernites Leonova, 1983
Ristedtoceras Kröger & Mapes, 2004
Robinsonites Shevyrev, 1995
Rochites Collignon, 1960
Rodighieroites
Roigites Wierzbowski, 1976
Rollerites
Rollieria Jeannet, 1951
Ronconites Balini, 1992
Rondiceras Troitzkaya, 1956
Ronkinites Shul'gina, 1972
Ropaloceras Zhuravleva, 1972
Rossalites Casey, 1961
Rossiceras Sestini, 1994
Rossicoceras Balashov, 1961
Rossoceras
Rotocanites Weyer, 1972
Rubroceras Cobban, Hook & Kennedy, 1989
Ruddellites Malinsky & Mapes, 1982
Rudolfoceratidae
Ruedemannoceratidae
Rugiferites Buckman, 1921
Rugobactrites Mapes, 1979
Rursiceras Buckman, 1919
Rusoceras
Russanovia Bodylevskii, 1967
Ruzhencevites Mikesh, 1968
Ryspoceras Zhuravleva, 1978
Ryuella Klinger & Kennedy, 1997
Ryugasella Wright & Matsumoto, 1954
Sabaliceras Yan & Yan, 1992
Sabaudiella Busnardo, Charollais, Weidmann & Clavel, 2003
Sabaudiella Vasícek & Hoedemaeker, 2003
Sabbaiceras Avram & Gradinaru, 1993
Sabydites Bogomolov & Burdykina, 1989
Saccaiaceras Venturi & Nannarone, 2002
Sachsibelus Gustomesov, 1966
Sactorthoceratidae
Sageceratidae Hyatt, 1884
Sagenitidae Spath, 1951
Sakhaitoides Ermakova, 1999
Sakondryella Collignon, 1964
Salfeldiella Spath, 1927
Salpingoteuthididae
Salpingoteuthis Lissajous, 1915
Saltericeras
Sancarlosia Chiplonkar & Ghare, 1978
Sandlingitidae Tozer, 1971
Sanxianoceras Xu, 1981
Sarisoceras Zhuravleva, 1978
Sarmatisphinctes Kutek & Zeiss, 1997
Sastryiceras Chiplonkar, Ghare & Oka, 1982
Satoceras Westermann & Callomon, 1988
Saxoceras Lange, 1924
Scaphamites Wiedmann & Marcinowski, 1985
Scaphitidae Meek, 1876
Scaphitodites Buckman, 1924
Scaphoceras Zhuravleva, 1986
Scaptorrhynchus Bellardi, 1873
Sceptrites Flower, 1939
Schaireria Checa & Oloriz, 1984
Scheutzites Tatzreiter, 1985
Schindewolfites Wiedmann, 1960
Schistoceratidae Schmidt, 1929
Schistophylloceras Hyatt, 1900
Schizoclymenia Schindewolf, 1924
Schloenbachiidae Parona & Bonarelli, 1897
Schlotheimiidae Spath, 1923
Schmidtoceras Westermann, 1956
Schneidia Atrops, 1982
Scholotheimiidae
Schreinbachites Bloos, 1994
Schreyerites Tatzreiter & Balini, 1993
Schuchmanoceras Murphy & Rodda, 1996
Schuichengoceras
Schwandorfia
Scoticardioceras Buckman, 1925
Scotokionoceras Lamont, 1978
Securisites Cariou, Elmi & Mangold, 1992
Sedgwickoceras Boghoslovsky, 1957
Seguenziceras Levi, 1896
Seimkanites Konstantinov, 1999
Seironautilus Zhao, Liang & Zheng, 1978
Selenoceras Zhuravleva, 1972
Sellaclymeniidae Schindewolf, 1923
Selwoodites Becker, 2002
Selwynoceras Warren & Stelck, 1940
Semenoviceras Wright, 1996
Semenovites Glazunova, 1960
Semibeyrichites Krystyn & Tatzreiter, 1991
Semiformiceras Spath, 1925
Semipulchellia Bürgl, 1956
Semirasenia Sazonov, 1960
Semisulcatoceras Joly, 2000
Senefelderiteuthis Engeser & Keupp, 1999
Sepiaphoridae
Sepiida Zittel, 1895
Sepiolida Fioroni, 1981
Septimaniceras Faure, 2002
Sequenziceras Buckman, 1913
Serbarinovella Mitta, 1988
Sewardoceras Flower, 1968
Seymourites Killian & Reboul, 1909
Shaanxiceras Lai, 1982
Shakraceras Basse & Karpoff, 1957
Shalshalia Waterhouse, 1994
Shangsiceras Lai & Zhu, 1986
Shangsilites Sheng, 1989
Shaoyangoceras Zhou, 1979
Shastoceras Anderson, 1938
Sheshanoceras Chen, 1984
Shevyrevoceras Waterhouse, 1994
Shideleroceratidae
Shikhanitidae
Shikhanoceras Shimanskii, 1954
Shimanskya Doguzhaeva, Mapes & Mutvei, 1999
Shimenites Xu, 1977
Shimizuoceras Zhuravleva, 1962
Shipaia Hsiang, 1978
Shirbuirnia Buckman, 1910
Shuangyangites Liang, 1982
Shumarditidae Plummer & Scott, 1937
Shumarinaia Matsumoto & Inoma, 1975
Shyndoceras Leonova, 1983
Siamnautilus Ishibashi, Nakornsri & Nagai, 1994
Siberioceras Zhuravleva, 1957
Siberites Klimova, 1983
Sibiribelus Gustomesov, 1977
Sibiritidae Mojsisovics, 1896
Sichuanaceras
Sichuanobelus Zhu & Bian, 1984
Sichuanoceratidae
Sichunoceras
Sidemina Castelnau, 1843
Sigaloceras Hyatt, 1900
Silberlingeria Waterhouse, 1999
Silberlingites Bucher, 1989
Silesitidae Hyatt, 1900
Silesitoides Spath, 1925
Silicisphinctes Schweigert & Zeiss, 1999
Simaspidoceras Spath, 1925
Simichelloceras
Simionescites Avram, 1976
Simmoceras
Simobactrites Doguzhaeva, 2002
Simobelus Gustomesov, 1958
Simoceras Zittel, 1870
Simoceratidae
Simocosmoceras Spath, 1925
Simosphinctes Barthel, 1957
Simospiticeras Oloriz & Tavera, 1979
Simotoichites Buckman, 1923
Simpbicioceras Schultz, 1977
Simplicites Waterhouse, 2001
Simpsonibelus Doyle, 1992
Sindeites Spath, 1925
Sinobactrites Niko, Nishida & Kyuma, 1997
Sinobelemnites Zhu & Bian, 1984
Sinobelemnitidae
Sinobeloceras Yatskov, 1990
Sinoceras Shimizu & Obata, 1935
Sinoceroides Xu & Lai, 1987
Sinocochlioceras Qi, 1980
Sinoendoceras Lai, 1985
Sinolebetoceras Chen & Qi, 1979
Sinopronorites Ruan, 1981
Sinotitanoceras Pan Yuntang, 1983
Sinotitidae
Sinuobactritidae
Sinzovia Sazonova, 1958
Siphonium Link, 1807
Sirenitidae
Sirenotibetites Tozer, 1994
Sisupalia Waterhouse, 1996
Sivajiceras Spath, 1928
Skirroceras Mascke, 1906
Skleroceras Zhuravleva, 1978
Skolekostephanus Buckman, 1921
Skoumalia Summesberger, 1979
Slatterites Spath, 1923
Slemmestadoceras Kroger, 2008
Smedaliceras Young, 1963
Smileoceras Zhuravleva, 1972
Smithoceras Diener, 1907
Soaniceras Meledina, 1977
Sobolewiidae House, 1989
Sohlites Imlay, 1967
Sokolovites Casey, 1966
Solenoceros Conrad, 1860
Somalibelus Jeletzky, 1972
Somaliceras Spath, 1925
Somalites Tavani, 1949
Somoholitidae Ruzhencev, 1938
Songkanoceras Chen, 1981
Sonniniidae
Sophoceras Zhuravleva, 1972
Sornayceras Matsumoto, 1965
Sounnaites Matsumoto & Inoma, 1991
Spanioceras Zhuravleva, 1974
Spanioteuthis Ghustomesov, 1960
Spathiceras Whitehouse, 1927
Spathitoides Wiedmann, 1960
Speetoniceras Spath, 1924
Sphaeroceratidae
Sphaerocoeloceras Jaworski, 1926
Sphaerodomites Rollier, 1909
Sphaeroptychius Lissajous, 1923
Sphaerorthoceras Ristedt, 1968
Sphaleroceras Zhuravleva, 1999
Sphenarpites
Sphenoclymeniidae Korn, 1992
Sphenodiscidae Hyatt, 1900
Sphingitidae Arthaber, 1911
Sphooceratidae
Spicatoceras Collins, 1966
Spinammatoceras
Spinokosmoceras
Spiroceras Quenstedt, 1856
Spiroceratidae
Spirolegoceratidae Nassichuk, 1970
Spirulida Stolley, 1919
Spirulirostridae Naef, 1916
Spiticeras Uhlig, 1903
Spondeioceras Zhuravleva, 1972
Sporadoceratidae Miller & Furnish, 1957
Spyroceratidae Shimizu & Obata, 1936
Stacheites Kittl, 1903
Stacheitidae Waterhouse, 1999
Stagonites Zhuravleva, 1972
Standardoceras Stait & Flower, 1985
Stantonoceras Johnson, 1903
Staufenia
Stchirowskiceras Sazonova, 1971
Stegoxyites Buckman, 1924
Stehnocephalites Riccardi, Westermann & Elmi, 1989
Steinmannitidae Tozer, 1994
Stelckiceras Jeletzky, 1980
Steloceras Olivero, 1988
Stemmatoceras Mascke, 1906
Stenocadoceras Imlay, 1953
Stenoconites Gordon, 1966
Stenolaphyritidae Ruzhencev & Bogoslovskaya, 1971
Stenophyllites Tozer, 1994
Stephanitidae Arthaber, 1896
Stephanoceratidae
Stephanosphinctes Sandoval & Westermann, 1986
Stereoplasmoceratidae
Stiloceras Zhuravleva, 1978
Stockumites Becker, 1996
Stolleites
Stotticeras Jeletzky, 1980
Strajevskya Mikhailov, 1962
Strambergella Nikolov, 1966
Streblites Hyatt, 1900
Strebliticeras
Streeliceras Becker, 1996
Strenoceras Hyatt, 1900
Streptocadoceras Meledina, 1977
Strialoceras Histon, 1998
Striatuncus Engeser, 1988
Strigoceras Quenstedt, 1886
Strigoceratidae
Strigogranulaptychus Schweigert, 2000
Strigotumaroceras Popov, 1970
Strobiloceras Zhuravleva, 1972
Stroggyloceras Zhuravleva, 1972
Struebinia Zeiss, 1962
Strungia Arkell, 1952
Sturiidae Kipsarova, 1958
Styracoceras Hyatt, 1903
Subalbanites Zakharov, 1978
Subarcthoplites Casey, 1954
Subaxiceras Lai & Wang, 1981
Subbarroisiceras
Subbonarellia Spath, 1928
Subcollina Spath, 1925
Subcrimites Liang, 1982
Subdichotomoceras Spath, 1925
Subdiscosphinctes Malinowska, 1972
Subdoricranites Astakhova, 1960
Subeucalycoceras Thomel, 1969
Subglassoceras Ruzhentzev, 1959
Subgrossouvria Spath, 1924
Subhastites Gustomesov, 1977
Subhungarites Tozer, 1994
Subkossmatia Spath, 1924
Sublithacoceras Spath, 1925
Sublunuloceras Spath, 1928
Submantelliceras Spath, 1923
Subnebrodites Spath, 1925
Subneumayria Spath, 1924
Subolenekites Zakharov, 1978
Suboosterella Spath, 1924
Subowenites Popov, 1962
Suboxydiscites Poulton, Zeiss & Jeletzky, 1988
Subpenhsioceras Shimizu & Obata, 1935
Subpervinquieria Mirzoyev, 1969
Subplanitoides Zeiss, 1968
Subpolyptychites Sazonova, 1971
Subprionocyclus
Subptychoceras Shimizu, 1935
Subpulchellia Hyatt, 1903
Subshumardites
Subspeetoniceras Ivanov & Aristov, 1969
Subspyroceras Shimizu & Obata, 1935
Subtemnoptychites Klimova, 1978
Subthurmannia Spath, 1939
Subtissotia Hyatt, 1903
Subtofangoceras
Subulibelus Riegraf, 1981
Subvertebriceras Arkell, 1941
Subwinnipegoceras Liang, 1981
Sudeticeratidae
Suebibelus Riegraf, 1981
Sueroceras Riccardi & Sabattini, 1975
Sueviteuthis Reitner & Engeser, 1982
Sulaites Oloriz & Westermann, 1998
Sulciferites Spath, 1922
Sulcohamites Wetzel, 1937
Sulcohamitoides Beznosov & Kutuzova, 1990
Sulcohoplites Michailova & Saveliev, 1994
Sumitomoceras Matsumoto, Muramoto & Takahashi, 1969
Sundaitidae Ruzhencev, 1957
Sunrisites Guex, 1980
Surenitidae Ruzhencev & Bogoslovskaya, 1975
Suridiscus Sazonova, 1977
Sutinaites Golubic, 1999
Sweetoceras Stumbur, 1962
Sycoceras Pictet, 1854
Synetoceras Zhuravleva, 1972
Taffertia Guex, 1973
Taihangshanoceras Chen & Zou, 1980
Taimyrites Vavilov & Arkadiev, 1986
Taimyroceras Bodylevsky, 1956
Taimyrosphinctes Mesezhnikov, 1972
Talattoceras Myagkova, 1967
Talkeetnites Imlay, 1980
Tallinoceras Balaschov, 1960
Tamaritidae Korn, 2001
Tambegiroceras Myagkova, 1967
Tamdoceras Malinovskaya, 1964
Tangshanoceras Chen, 1976
Tanshiceras Lai, 1980
Tanycameroceras Chen & Qi, 1979
Taoqupoceras Lai, 1982
Taouzitidae Korn, 2001
Tapashanitidae Zhao et al., 1978
Tapinolituites Gao, 1982
Tardoria Waterhouse, 1999
Tareyoceras Zhuravleva, 1996
Tarfayites Collignon, 1966
Tarphyceratidae
Tarrantoceras Stephenson, 1955
Tartaroceras Zhuravleva, 1978
Tashanoceras Lai, 1980
Taskanoceras Zhuravleva, 1972
Tatrophylloceras Beznosov, 1957
Tauriaptychus Kozlova & Arkadiev, 2003
Tauricoceras Kvantaliani & Lysenko, 1979
Tauriconites Kabanov, 1984
Tauroceras Schafhäutl, 1854
Taveraidiscus Vermeulen & Thieuloy, 1999
Taxyceras Zhuravleva, 1972
Taxyceratidae
Tayloricites Guex, 1987
Tchernyschevites Zakharov, 1987
Teicherticeratidae Bogoslovsky, 1969
Telermoceras
Telleroceras Flower, 1968
Telobelemnopsis Hewlett, 1989
Telodactylites Pinna & Levi-Setti, 1971
Telodactylus
Temnocheiloides Shimanskii, 1967
Teneroceras Chlupac & Turek, 1983
Teratoceras Xu, 1981
Teratoceroides Xu & Lai, 1983
Terektites
Teshioites Matsumoto, 1955
Tetragonitidae Hyatt, 1900
Tetrahoplites Casey, 1952
Tetrahoplitoides Casey, 1954
Tetraspidoceras Spath, 1926
Tetsaoceras Tozer, 1994
Teuthida Naef, 1916
Tewoceras Chen & Wen, 1987
Thalassoceratidae Hyatt, 1900
Thallassoceras
Thambites Arkell, 1952
Thamboceras Douvillé, 1916
Thanamitidae Tozer, 1971
Theditites Diener, 1923
Theganoceras
Therioceras Zhuravleva, 1972
Theskeloceras
Thetiditidae Tozer, 1971
Thiniites Krystyn, 1982
Thisbitidae Spath, 1951
Thomelites Juignet, Kennedy & Wright, 1973
Thonoceras Zhuravleva, 2002
Thraxites
Threskeloceras Jun-Yuan & Teichert, 1983
Thylacoceratidae
Thysanolytoceras Buckman, 1905
Tianshanoceras Lai & Wang, 1981
Tibetitidae Hyatt, 1900
Tienjunites Wu, 1983
Tienoceras Chao, 1954
Tilichonia Waterhouse, 1994
Tillicheilus Shimansky, 1947
Tiltoniceras Buckman, 1913
Timoceras Dagys & Ermakova, 1988
Timtozeria Waterhouse, 1999
Tinacoceras Zhuravleva, 1990
Tingriceras Chao, 1976
Tintanticeras Blaison & Bourquin, 1966
Tipperoceras Taylor, 1998
Tirljanoceras Zhuravleva, 1978
Tirolitidae
Tissotiidae Hyatt, 1900
Tissotioides Reyment, 1958
Tithonosphinctes Zeiss, 1968
Tithopeltoceras Arkell, 1953
Tmaegoceras Hyatt, 1889
Tmaegophioceras Spath, 1925
Tmetoceras Buckman, 1892
Toarcibelus Riegraf, 1980
Tobolia Sazonov, 1960
Togaticeras Rakus, 1993
Tolvericeras
Tolypeceras Hyatt, 1903
Tompoites Ermakova, 1977
Tompoproptychites Vavilov & Zakharov, 1976
Tongdzuyites Meister, Khuc, Huyen & Doyle, 2000
Tongoboroceras
Tongoboryceras Housa, 1967
Tongyiceras Lai, 1985
Torcapella Busnardo, 1970
Toricellites Buckman, 1922
Tornoceratidae Arthaber, 1911
Tornquisites
Torquatisphinctes Spath, 1924
Torquatoceras Stridsberg, 1988
Torquistylus Casey, 1961
Torrensia Sturani, 1971
Toucasiella Enay, Boughdiri & Le Hegarat, 1998
Toulisphinctes Sapunov, 1979
Tovebirkelundites Cooper, 1994
Toxalambites
Toxamblyites Buckman, 1924
Tozeria Tatzreiter, 1985
Tozerites Silberling & Nichols, 1982
Trachybaculites Cobban & Kennedy, 1995
Trachyceratidae Haug, 1894
Trachylytoceras Buckman, 1913
Trachyteuthididae Naef, 1921
Tragodesmoceroides Matumoto, 1942
Tragolytoceras Spath, 1924
Trainoceratidae
Transcaspiites Luppov, 1985
Transicoeloceras Pinna, 1966
Transilongoceras Repin, 2002
Transipsiloceras Guex, 1980
Trautscholdiceras Sazonova, 1977
Trenerites Sarti, 1993
Treptocceras
Tretoceras Salter, 1858
Triagolytoceras
Triainocerataceae
Triainoceratidae
Trianglites Matsumoto, 1977
Trifurcatoceras Obata, 1940
Trigonodema
Trigonogastrioceras Librovitch, 1947
Trigonoshumardites Kullmann, 1962
Trilacinoceras Sweet, 1958
Trilobiticeras Buckman, 1919
Trimarginia Arkell, 1952
Trimeroceratidae Hyatt & Zittel, 1900
Trinitoceras Flower, 1976
Triozites Buckman, 1924
Tripleuroceratidae
Tripteroceratidae Flower
Tripteroceroides Miller & Furnish, 1940
Trispectes Zhuravleva, 1991
Tritonoceras Zhuravleva, 1972
Trochiskioceras Schairer & Schlampp, 1991
Trochleiceras Fallot & Termier, 1923
Trochleiceratidae
Trocholitidae Chapman
Troedssonellidae
Troitsaia Poulton & Tipper, 1991
Trolliceras Torrens, 1971
Tropiceltidae
Tropiceltitidae Spath, 1951
Tropihalorites Shevyrev, 1990
Tropijuvavites Krystyn, 1982
Tropithisbites Tozer, 1994
Tropitidae Mojsisovics, 1875
Tropitoides Spath, 1925
Tsaidamoceras Lai, 1985
Tshingizoceras Barskov, 1972
Tshuiliceras Barskov, 1980
Tuberodiscoides Collignon, 1966
Tuberolechites Cooper & Kennedy, 1977
Tuchodiceras Tozer, 1994
Tugurites Kalacheva & Sei, 1970
Tulites Buckman, 1921
Tulitidae
Tumilites
Tunesites Pervinquière, 1907
Tunglanitidae Waterhouse, 1999
Tunguskoceras Zhuravleva, 1957
Tunisiceras Dommergues & Meister, 2004
Turbinites Dubourdieu, 1953
Turbobactrites Mapes, 1979
Turkmeniceras Tovbina, 1963
Turkmenites Il'in, 1975
Turrilitidae Meek, 1876
Turrilitoides Spath, 1923
Tuxednites Imlay, 1980
Tyranites Oken, 1815
Tyrannites Cariou, 1984
Tyrioceras Strand, 1934
Tyrolites Waagen, 1879
Tzankoviceras Manolov, 1962
Uddenitidae Miller & Furnish, 1940
Udschasphinctes Mesezhnikov, 1972
Ugdulenia Cantaluppi, 1970
Uhligia Koenen, 1904
Ukhtoceras Zhuravleva, 1972
Ukhtoceratidae
Umaltites Sey & Kalacheva, 1979
Umiates
Ungulites Zhuravleva, 1972
Unionvillites Silberling & Nichols, 1982
Unipeltoceras Jeannet, 1951
Unquatornoceras
Urakawites Matsumoto, 1955
Uralobactrites Doguzhaeva, 2002
Uranoceratidae
Urbanekuncus Kulicki & Szaniawski, 1972
Urkutites Geczy, 1967
Urtasymoceras Zhuravleva, 1972
Usseliceras Zeiss, 1968
Ussuriidae Spath, 1930
Ussurinautilus Kiparisova, 1961
Ussuriphyllites Zakharov, 1967
Ussuritidae Hyatt, 1900
Utaturiceras Wright, 1956
Vacekia Buckman, 1899
Vajgachites Zhuravleva, 1978
Valcouroceratidae Flower
Valentolytoceras Beznosov, 1956
Validoteuthis Glazunova, 1969
Vampyromorphida Pickford, 1939
Vanartinskia Ruzhencev, 1978
Varlheideites Rawson & Kemper, 1978
Varunaites Shimizu, 1927
Vasalemmoceras Stumbur, 1962
Vascoceratidae Douvillé, 1912
Vassaroceras Ulrich, Foerste, Miller & Unklesbay, 1944
Vasseuriidae
Vaunagites Combemorel & Gayte, 1981
Vavilovites Tozer, 1971
Vectibelus Jeletzky, 1981
Vectisites Casey, 1962
Veitinautilus Engeser, 1995
Veleziceras Wright, 1957
Venezuella Kvantaliani, 1980
Ventrolobendoceras
Vergoliceras Atrops & Reboulet, 1996
Vergunniceras Thomel, 1980
Vericeras Kolebaba, 1977
Vermisphinctes Buckman, 1922
Vertebriceras Buckman, 1920
Veveysiceras Vasícek & Wiedmann, 1994
Veveysiella Busnardo, Charollais, Weidmann & Clavel, 2003
Vicininodiceras Trueman, 1919
Vidrioceratidae Plummer & Scott, 1937
Villania Till, 1909
Viluceras Aguirre-Urreta & Rawson, 1999
Vinalesphinctes Spath, 1931
Virgataxioceras Arkell, 1953
Virgatitidae
Virgatopavlovia Cope, 1978
Virgatosimoceras Spath, 1925
Virgatosphinctes Uhlig, 1910
Virgatospinctoides
Vischniakovia Gerasimov, 1978
Voehringeritidae
Volanoceras Geyssant, 1985
Volgobelus Gustomesov, 1976
Volgoceratoides Mikhailova & Baraboshin, 2002
Vologdinella Balashov, 1962
Vorborthella
Vorobyevites Shevyrev, 1995
Vossia Alexeyev, 1992
Waagenina Krotow, 1888
Waagenoproptychites Waterhouse, 1996
Waehneroceras Hyatt, 1889
Wagnericeras Buckman, 1921
Waikatoceratas Westermann, 2000
Walpenites Casey, 1962
Wangounoceras Liang, 1981
Wangyikangia Waterhouse, 1996
Warrenoceras Frebold, 1963
Weavericeras Leanza & Wiedmann, 1980
Weberoceras Barskov, 1972
Wegelea Gygi, 2000
Weishanhuceras Chen & Qi, 1979
Weitschatinautilus Engeser, 1995
Welleritidae Plummer & Scott, 1937
Wellmanites Wright, 1957
Wellsia Imlay, 1957
Welterites Diener, 1923
Werneroceratidae Erben, 1964
Werthenoceras
Westermanniceras Riccardi, 2000
Westermannites Dietze, Chandler, Schweigert & Auer, 2001
Westfieldoceras Stait, 1984
Westonoceratidae
Wetherbyoceras Foerste, 1926
Wheatleyites Buckman, 1922
Whitbyiceras Buckman, 1913
Wichmanniceras Leanza, 1945
Wiedeyoceratidae Ruzhencev & Bogoslovskaya, 1978
Williamsoceras
Windhauseniceras Leanza, 1945
Winstonoceras Flower, 1984
Wintonia Adkins, 1928
Wocklumeriidae Schindewolf, 1937
Wrightites Manolov, 1962
Wutinoceratidae
Xainzanoceras Chen, 1987
Xenoceltitidae Spath, 1930
Xenocephalites Spath, 1928
Xenodiscidae Frech, 1902
Xenoprotrachyceras Wang, 1983
Xenostephanoides Arkell & Callomon, 1963
Xenostephanus Arkell & Callomon, 1963
Xiadongoceras Lai & Xu, 1983
Xianlinoceras Zou, 1987
Xiaoshanoceras Jun-Yuan & Teichert, 1983
Xiaoshanoceratidae
Xiaoshaoceras
Xiaoxiangoceras Chen, 1981
Xiazhenoceras Chen, 1987
Xilingoceras Xu & Lai, 1987
Xinjiangites Ruan, 1995
Xinjiangoconus Chen, 1988
Xinjiangonites Wang
Xiphoceras Zhuravleva, 1972
Xiphoteuthididae
Xorkoloceras Lai & Wang, 1986
Xuanenoceras Xu, 1977
Xyloceras Zhuravleva, 1978
Yakounia Jakobs & Smith, 1996
Yakushiceras Matsumoto, 1991
Yakutosirenites Tozer, 1994
Yangjiapingoceras Xu, 1977
Yanheceras Chen, 1979
Yanheceratidae
Yanjinoceras Wang, 1978
Yannanoceras
Yanosirenites Bytschkov, 1982
Yanwashanoceras Qi, 1984
Yaoxianoceras Lai, 1981
Yebisites Matsumoto, 1956
Yeharaites Matsumoto, 1991
Yehlioceras Obata, 1940
Yezoceras Matsumoto, 1977
Yichangoceras Chen, 1981
Yiduceras Xu & Lai, 1987
Yimengshanoceras Chen, Zou & Qi, 1980
Yokoyamaceras
Yorkoceras Flower, 1968
Yorkoceratidae
Youngibelus Riegraf, 1980
Yukagirites Repin, 1998
Yunnanites He, 1985
Yunnanoceras Chen, 1981
Yushanoceras Chen & Liu, 1976
Zakharovites Waterhouse, 1994
Zapalia Leanza & Zeiss, 1990
Zaraiskites Semenoff, 1897
Zeehanoceras Stait, 1982
Zeissiceras Vigh, 1984
Zeissoceras Elmi, 1967
Zemistephanus McLearn, 1927
Zerashanoceras
Zeravshanoceras Zhuravleva, 1978
Zestoceras Tozer, 1994
Zetoceras
Zhaojinkeoceras Waterhouse, 1994
Zhaolorites Bartzsch & Weyer, 1988
Zhitkovites Zakharov, 1997
Zhongnanoceras Xu & Lai, 1983
Zhuibanoceras Chen & Qi, 1981
Zhuibianoceras
Zhuralevia
Zieteniceras Zeiss, 1956
Zigzagiceras Buckman, 1902
Zitteliceras Santantonio, 1985
Zogeceras Gao, 1983
Zonovia Sazonov, 1960
Zooceras Zhuravleva, 1972
Zuercherella Casey, 1954
Zugmontites Reis, 1907
Zugodactylites Buckman, 1926
Zugokosmoceras
Zuluiceras van Hoepen, 1965
Zuluites Van Hoepen, 1965
Zuluscaphites van Hoepen, 1955
Zurcheria Douvillé, 1884