Hydraena Kugelann, 1794
Classification
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Hydraenidae Mulsant, 1844
- Hydraena Kugelann, 1794
Hydraena abbasigili Jäch, 1988
Hydraena abdita Orchymont, 1948
Hydraena abyssinica Régimbart, 1905
Hydraena accurata Orchymont, 1948
Hydraena achaica Jäch, 1995
Hydraena adrastea Orchymont, 1948
Hydraena aethaliensis Breit, 1917
Hydraena affirmata Perkins, 2007
Hydraena affusa Orchymont, 1936
Hydraena africana Kuwert, 1888
Hydraena akbesiana (Audisio, De Biase & Jäch, 1993)
Hydraena albai Sáinz-Cantero, 1993
Hydraena alberti Balfour-Browne, 1950
Hydraena alcantarana Ienistea, 1985
Hydraena algerina Kaddouri, 1992
Hydraena alia Orchymont, 1934
Hydraena aliciae Jäch & Díaz, 2005
Hydraena allomorpha Lagar & Fresneda, 1990
Hydraena alluaudi Régimbart, 1906
Hydraena alpicola Pretner, 1931
Hydraena altamirensis Díaz Pazos & Garrido Gonzales, 1993
Hydraena alternata Perkins, 1980
Hydraena alterra Perkins, 1980
Hydraena alticola Skale & Jäch, 2008
Hydraena ambiflagellata Zwick, 1977
Hydraena ambigua Ganglbauer, 1901
Hydraena ambiosina Perkins, 2007
Hydraena americana Jäch, 1993
Hydraena amidensis Jäch, 1988
Hydraena anaphora Perkins, 1980
Hydraena anatolica Janssens, 1963
Hydraena ancylis Perkins, 1980
Hydraena ancyrae Jäch, 1992
Hydraena andalusa Lagar & Fresneda, 1990
Hydraena andreinii Orchymont, 1934
Hydraena angulicollis Notman, 1921
Hydraena angulosa Mulsant, 1844
Hydraena angustata Sturm, 1836
Hydraena anisonycha Perkins, 1980
Hydraena antaria Perkins, 2007
Hydraena antiatlantica Jäch, Aguilera, and Hernando, 1998
Hydraena antiochena Jäch, 1988
Hydraena appalachicola Perkins, 1980
Hydraena appetita Perkins, 2007
Hydraena arabica Balfour-Browne, 1951
Hydraena arachthi Ferro & Jäch, 2000
Hydraena arcta Perkins, 2007
Hydraena arenicola Perkins, 1980
Hydraena argutipes Perkins, 1980
Hydraena ariana Janssens, 1962
Hydraena arizonica Perkins, 1980
Hydraena armata Reitter, 1880
Hydraena armeniaca Janssens, 1968
Hydraena armipalpis Jäch & Díaz, 2000
Hydraena armipes Rey, 1886
Hydraena arunensis Skale & Jäch in Jäch & Skale, 2009
Hydraena ascensa Perkins, 2007
Hydraena assimilis Rey, 1885
Hydraena athertonica Perkins, 2007
Hydraena atrata Desbrochers des Loges, 1891
Hydraena attaleiae Ferro, 1984
Hydraena audisioi Jäch, 1992
Hydraena aurita Jäch, 1988
Hydraena australica Zwick, 1977
Hydraena australula Perkins, 2007
Hydraena avuncula Jäch, 1988
Hydraena bactriana Janssens, 1962
Hydraena balearica Orchymont, 1930
Hydraena balfourbrownei Bameul, 1986
Hydraena balli Orchymont, 1940
Hydraena barbipes Zwick, 1977
Hydraena barricula Perkins, 1980
Hydraena barrosi Orchymont, 1934
Hydraena bedeli Barthélemy, 1992
Hydraena belgica Orchymont, 1930
Hydraena benjaminus Jäch & Díaz, 2006
Hydraena bensae Ganglbauer, 1901
Hydraena bergeri (Janssens, 1972)
Hydraena berthelemyana Jäch, Díaz & Dia in Jäch, Dia & Díaz, 2006
Hydraena berytus Jäch, 1986
Hydraena beyarslani Jäch, 1988
Hydraena bicolorata Jäch, 1997
Hydraena bicuspidata Ganglbauer, 1901
Hydraena bidefensa Perkins, 2007
Hydraena bihamata Champion, 1920
Hydraena biimpressa Perkins, 2007
Hydraena billi Zwick, 1977
Hydraena bilobata Jäch & Díaz, 1998
Hydraena bimagua Jäch, 1986
Hydraena birendra Skale & Jäch in Jäch & Skale, 2009
Hydraena bispinosa Pu, 1951
Hydraena bisulcata Rey, 1884
Hydraena bitruncata Orchymont, 1934
Hydraena bituberculata Perkins, 1980
Hydraena blackburni Zaitzev, 1908
Hydraena bodemeyeri Jäch & Díaz, 2001
Hydraena boetcheri Orchymont, 1932
Hydraena bolivari Orchymont, 1936
Hydraena bononiensis Binaghi, 1960
Hydraena borbonica Fairmaire, 1898
Hydraena brachymera Orchymont, 1936
Hydraena bractea Perkins, 1980
Hydraena bractoides Perkins, 1980
Hydraena breedlovei Perkins, 1980
Hydraena brevis Sharp, 1882
Hydraena britteni Joy, 1907
Hydraena brittoni Zwick, 1977
Hydraena bromleyae Jäch, 1986
Hydraena browni Perkins, 1980
Hydraena bulgarica Breit, 1916
Hydraena busuanga Freitag & Jäch, 2007
Hydraena calcarifera Janssens, 1959
Hydraena californica Perkins, 1980
Hydraena campbelli Perkins, 1980
Hydraena canakcioglui Janssens, 1965
Hydraena canticacollis Perkins, 1980
Hydraena capacis Perkins, 2007
Hydraena capetribensis Perkins, 2007
Hydraena cappadocica Jäch, 1988
Hydraena capta Orchymont, 1936
Hydraena carbonaria Kiesenwetter, 1849
Hydraena carica Jäch, 1988
Hydraena carinulata Rey, 1886
Hydraena carniolica Pretner, 1970
Hydraena castanea Deane, 1937
Hydraena castanescens Freitag & Jäch, 2007
Hydraena cata Orchymont, 1943
Hydraena catalonica Fresneda, Aguilera & Hernando, 1994
Hydraena catherinae Bameul & Jäch, 2001
Hydraena caucasica Kuwert, 1888
Hydraena cephalleniaca Jäch, 1985
Hydraena cervisophila Jäch, 1992
Hydraena chenae Pu, 1951
Hydraena chersonesica Jäch, Díaz & Przewozny, 2007
Hydraena chiapa Perkins, 1980
Hydraena chiesai Janssens, 1965
Hydraena chifengi Jäch & Díaz, 1999
Hydraena chobauti Guillebeau, 1896
Hydraena christinae Audisio, De Biase & Jäch, 1996
Hydraena christoferi Jäch & Díaz, 2005
Hydraena ciliciensis Jäch, 1988
Hydraena circulata Perkins, 1980
Hydraena cirrata Champion, 1920
Hydraena claudia Freitag & Jäch, 2007
Hydraena clavigera Zwick, 1977
Hydraena clemens Jäch & Díaz, 2006
Hydraena colchica Janssens, 1963
Hydraena colombiana Perkins, 1980
Hydraena colymba Perkins, 1980
Hydraena compressipilis Jäch & Díaz, 1998
Hydraena concinna Orchymont, 1932
Hydraena confusa Pu, 1951
Hydraena connexa Orchymont, 1932
Hydraena converga Perkins, 2007
Hydraena coomani Orchymont, 1932
Hydraena cooperi Balfour-Browne, 1954
Hydraena cordata Schaufuss, 1883
Hydraena cordiformis Jäch & Díaz, 2000
Hydraena corinna Orchymont, 1936
Hydraena cornelli Jäch & Díaz, 1998
Hydraena corrugis Orchymont, 1934
Hydraena coryleti Jäch, 1992
Hydraena costiniceps Perkins, 1980
Hydraena crepidoptera Jäch, 1992
Hydraena cristatigena Jäch & Díaz, 2000
Hydraena croatica Kuwert, 1888
Hydraena cryptostoma Jäch, 1992
Hydraena crystallina Perkins, 1980
Hydraena cubista Perkins, 2007
Hydraena cultrata Perkins, 2007
Hydraena cunninghamensis Perkins, 2007
Hydraena curta Kiesenwetter, 1849
Hydraena curtipalpis Jäch & Díaz, 1998
Hydraena cuspidicollis Perkins, 1980
Hydraena cyclops Jäch & Díaz, 2000
Hydraena cygnus Zwick, 1977
Hydraena czernohorskyi Müller, 1911
Hydraena d-destina Perkins, 1980
Hydraena dalmatina Ganglbauer, 1901
Hydraena damascena Pic, 1910
Hydraena darwini Perkins, 2007
Hydraena debeckeri (Janssens, 1972)
Hydraena decipiens Zwick, 1977
Hydraena decolor Sainte-Claire Deville, 1903
Hydraena decui Spangler, 1980
Hydraena delia Balfour-Browne, 1978
Hydraena deliquesca Perkins, 2007
Hydraena delvasi Delgado & Collantes, 1996
Hydraena densa Fauvel, 1883
Hydraena dentipalpis Reitter, 1888
Hydraena dentipes Germar, 1842
Hydraena devillei Ganglbauer, 1901
Hydraena devincta Orchymont, 1940
Hydraena diazi Trizzino, Jäch & Ribera, 2011
Hydraena dilutipes Fairmaire, 1898
Hydraena dimorpha Orchymont, 1922
Hydraena dinosaurophila Jäch, 1994
Hydraena discicollis Fairmaire, 1898
Hydraena discreta Ganglbauer, 1904
Hydraena disparamera Perkins, 2007
Hydraena dochula Skale & Jäch in Jäch & Skale, 2009
Hydraena dolichogaster Janssens, 1965
Hydraena dorrigoensis Perkins, 2007
Hydraena draconisaurati Jäch & Díaz, 2005
Hydraena ebriimadli Jäch, 1988
Hydraena egoni Jäch, 1986
Hydraena eichleri Orchymont, 1937
Hydraena elisabethae Jäch, 1992
Hydraena eliya Jäch, 1982
Hydraena emarginata Rey, 1855
Hydraena emineae Jäch & Kasapoglu, 2006
Hydraena epeirosi Ferro, 1985
Hydraena errina Orchymont, 1948
Hydraena erythraea Régimbart, 1905
Hydraena eryx Orchymont, 1948
Hydraena eucnemis Janssens, 1970
Hydraena evanescens Rey, 1884
Hydraena evansi Balfour-Browne, 1945
Hydraena exarata Kiesenwetter, 1866
Hydraena exasperata Orchymont, 1935
Hydraena excisa Kiesenwetter, 1849
Hydraena exilipes Perkins, 1980
Hydraena expedita Skale & Jäch in Jäch & Skale, 2009
Hydraena explanata Pic, 1905
Hydraena extorris Zwick, 1977
Hydraena falcata Jäch, 1992
Hydraena ferethula Perkins, 2007
Hydraena feuerborni Orchymont, 1932
Hydraena fijiensis Balfour-Browne, 1945
Hydraena filum Sahlberg, 1908
Hydraena finita Orchymont, 1943
Hydraena finki Skale & Jäch in Jäch & Skale, 2009
Hydraena finniganensis Perkins, 2007
Hydraena fiorii Porta, 1899
Hydraena fischeri Schönmann, 1991
Hydraena fluvicola (Perkins, 1980)
Hydraena fontana Orchymont, 1932
Hydraena fontiscarsavii (Jäch, 1988)
Hydraena formula Orchymont, 1932
Hydraena forticollis Perkins, 2007
Hydraena fosterorum Trizzino, Jäch & Ribera, 2011
Hydraena freitagi Skale & Jäch in Jäch & Skale, 2009
Hydraena frenzeli Skale & Jäch, 2008
Hydraena fritzi Jäch, 1992
Hydraena frondsicola (Perkins, 1980)
Hydraena fundaequalis Perkins, 2007
Hydraena fundata Perkins, 2007
Hydraena furthi Jäch, 1982
Hydraena gaditana Lagar & Fresneda, 1990
Hydraena galatica Janssens, 1970
Hydraena gavarrensis Jäch, Díaz & Martinoy, 2005
Hydraena geminya Perkins, 1980
Hydraena georgiadesi Orchymont, 1931
Hydraena geraldneuhauseri Jäch & Díaz, 2006
Hydraena germaini Orchymont, 1923
Hydraena glassmani Jäch, 1986
Hydraena gnatella Orchymont, 1945
Hydraena gnatelloides Orchymont, 1945
Hydraena gracilis Germar, 1824
Hydraena graciloides (Jäch, 1988)
Hydraena grandis Reitter, 1885
Hydraena graphica Orchymont, 1931
Hydraena grata Orchymont, 1944
Hydraena gregalis Orchymont, 1944
Hydraena gressa Orchymont, 1944
Hydraena griphus Orchymont, 1944
Hydraena grouvellei Orchymont, 1923
Hydraena grueberi Skale & Jäch in Jäch & Skale, 2009
Hydraena guadelupensis Orchymont, 1923
Hydraena guangxiensis Jäch & Díaz, 2005
Hydraena guatemala Perkins, 1980
Hydraena guentheri Jäch, 1992
Hydraena guilin Jäch & Díaz, 2005
Hydraena hainzi Jäch, 1988
Hydraena haitensis Perkins, 1980
Hydraena hamifera Zwick, 1977
Hydraena hansreuteri Jäch & Díaz, 2005
Hydraena helena Orchymont, 1929
Hydraena hernandoi Fresneda & Lagar, 1990
Hydraena heterogyna Bedel, 1898
Hydraena hiekei Jäch, 1992
Hydraena hillaryi Skale & Jäch in Jäch & Skale, 2009
Hydraena hispanica Ganglbauer, 1901
Hydraena holdhausi Pretner, 1929
Hydraena hortensis Jäch & Díaz, 2000
Hydraena hosiwergi Freitag & Jäch, 2007
Hydraena hosseinieorum Bilton & Jäch, 1998
Hydraena huangshanensis Jäch & Díaz, 2005
Hydraena huitongensis Jäch & Díaz, 2005
Hydraena hunanensis Pu, 1951
Hydraena hungarica Rey, 1884
Hydraena hyalina Perkins, 1980
Hydraena hynesi Zwick, 1977
Hydraena hypipamee Perkins, 2007
Hydraena iberica Orchymont, 1936
Hydraena iheya Jäch & Díaz, 1999
Hydraena ilamensis Skale & Jäch in Jäch & Skale, 2009
Hydraena ilica Jäch, 1994
Hydraena imbria Jäch & Díaz, 2001
Hydraena imperatrix Kniz, 1919
Hydraena impercepta Zwick, 1977
Hydraena impressicollis Fairmaire, 1898
Hydraena inancala Perkins, 2007
Hydraena inapicipalpis Pic, 1918
Hydraena incurva Orchymont, 1932
Hydraena indiana Jäch, 1994
Hydraena indica Orchymont, 1920
Hydraena ingens (Perkins, 1980)
Hydraena innuda Perkins, 2007
Hydraena inopilata Jach & Diaz, 1998
Hydraena inopinata Jäch & Díaz, 1998
Hydraena insita Orchymont, 1932
Hydraena insolita Orchymont, 1932
Hydraena insularis Orchymont, 1945
Hydraena integra Pretner, 1931
Hydraena intermedia Rosenhauer, 1847
Hydraena intraangulata Perkins, 2007
Hydraena inusta Orchymont, 1932
Hydraena invicta Perkins, 2007
Hydraena iriomotensis Jäch & Díaz, 1999
Hydraena isabelae Castro & Herrera, 2001
Hydraena isolinae Jäch & Díaz, 1998
Hydraena ispirensis Kasapoglu, Jäch & Skale, 2010
Hydraena iterata Orchymont, 1948
Hydraena jacobsoni Orchymont, 1932
Hydraena jaechiana (Audisio & De Biase, 1990)
Hydraena jaegeri Skale & Jäch in Jäch & Skale, 2009
Hydraena jailensis Breit, 1917
Hydraena janczyki Jäch, 1992
Hydraena janeceki Jäch, 1987
Hydraena janssensi Nilsson, 2001
Hydraena jengi Jäch & Díaz, 1998
Hydraena jilanzhui Jäch & Díaz, 2005
Hydraena jivaro Perkins, 1980
Hydraena kakadu Perkins, 2007
Hydraena karinkukolae Jäch, 1989
Hydraena karmai Skale & Jäch in Jäch & Skale, 2009
Hydraena kasyi Jäch, 1992
Hydraena kaufmanni Ganglbauer, 1901
Hydraena khnzoriani Janssens, 1968
Hydraena kilimandjarensis Régimbart, 1906
Hydraena knischi Orchymont, 1928
Hydraena kocheri Berthélemy, 1992
Hydraena kodadai Freitag & Jäch, 2007
Hydraena krasnodarensis Jäch & Díaz, 2006
Hydraena kroumiriana Kaddouri, 1992
Hydraena kuehnelti Jäch, 1989
Hydraena kurdistanica Jäch, 1988
Hydraena kwangsiensis Pu, 1951
Hydraena lapidicola Kiesenwetter, 1849
Hydraena lapissectilis Jäch, 1992
Hydraena larissae Jäch & Díaz, 2000
Hydraena larsoni Perkins, 2007
Hydraena latebricola Jäch, 1986
Hydraena latisoror Perkins, 2007
Hydraena lazica Janssens, 1963
Hydraena leechi Perkins, 1980
Hydraena leei Jäch & Díaz, 1998
Hydraena lehmanni Jäch & Díaz, 2005
Hydraena leonhardi Breit, 1916
Hydraena leprieuri Sainte-Claire Deville, 1905
Hydraena levantina Sahlberg, 1908
Hydraena ligulipes Jäch, 1988
Hydraena limpidicollis Perkins, 1980
Hydraena liriope Orchymont, 1943
Hydraena longicollis Sharp, 1882
Hydraena lucasi Lagar, 1984
Hydraena lucernae Zwick, 1977
Hydraena ludovicae Orchymont, 1931
Hydraena luminicollis Perkins, 2007
Hydraena luridipennis MacLeay, 1873
Hydraena lusitana (Berthélemy, 1977)
Hydraena lycia Jäch, 1988
Hydraena macedonica Orchymont, 1931
Hydraena maculicollis Champion, 1920
Hydraena madronensis Castor, García & Ferreras, 2000
Hydraena magna Pu, 1951
Hydraena magnessa Jäch, 1997
Hydraena magnetica Zwick, 1977
Hydraena mahensis Scott, 1913
Hydraena malickyi Jäch, 1989
Hydraena malkini Perkins, 1980
Hydraena manaslu Skale & Jäch in Jäch & Skale, 2009
Hydraena manfredjaechi Delgado & Soler, 1991
Hydraena manguao Freitag & Jäch, 2007
Hydraena marcosae Aguilera, Hernando & Ribera, 1997
Hydraena marginicollis Kiesenwetter, 1849
Hydraena mariannae Jäch, 1992
Hydraena marinae Castro, 2003
Hydraena martensi Skale & Jäch in Jäch & Skale, 2009
Hydraena martinschoepfi Jäch & Díaz, 2005
Hydraena masatakai Jäch & Díaz, 2003
Hydraena maureenae Perkins, 1980
Hydraena mazamitla Perkins, 1980
Hydraena mecai Millán & Aguilera, 2000
Hydraena melas Dalla Torre, 1877
Hydraena meschniggi Pretner, 1929
Hydraena metzeni Perkins, 2007
Hydraena mexicana Perkins, 1980
Hydraena mignymixys Perkins, 1980
Hydraena millerorum Perkins, 2007
Hydraena miniretia Perkins, 2007
Hydraena minutissima Steph., 1829
Hydraena mitchellensis Perkins, 2007
Hydraena miyatakei Satô, 1959
Hydraena modili Jäch, 1988
Hydraena monikae Jäch & Díaz, 2000
Hydraena monscassius Jäch, 1988
Hydraena monstruosipes Ferro, 1986
Hydraena monteithi Perkins, 2007
Hydraena morio Kiesenwetter, 1849
Hydraena mouzaiensis Sainte-Claire Deville, 1909
Hydraena muelleri Pretner, 1931
Hydraena muezziginea Jäch, 1988
Hydraena mylasae Jäch, 1992
Hydraena nelsonmandelai Makhan, 2008
Hydraena nevermanni Perkins, 1980
Hydraena newtoni Perkins, 1980
Hydraena nielshaggei Freitag & Jäch, 2007
Hydraena nigra Hatch, 1965
Hydraena nigrita Germar, 1824
Hydraena nike Jäch, 1995
Hydraena nilguenae (Jäch, 1988)
Hydraena nivalis Jäch, 1992
Hydraena notsui Sato, 1978
Hydraena numidica Sainte-Claire Deville, 1905
Hydraena nuratauensis Jäch, 1994
Hydraena oaxaca Perkins, 1980
Hydraena oblio Perkins, 1980
Hydraena occidentalis Perkins, 1980
Hydraena occitana (Audisio & De Biase, 1995)
Hydraena okinawensis Jäch & Díaz, 1999
Hydraena olidipastoris Jäch, 1988
Hydraena orchid Jach & Diaz, 1998
Hydraena orchis Jäch & Díaz, 1998
Hydraena orcula Perkins, 1980
Hydraena ordishi Delgado & Palma, 1997
Hydraena orientalis Breit, 1916
Hydraena ortali Jäch, 1986
Hydraena orthosia Jäch, Díaz & Dia in Jäch, Dia & Díaz, 2006
Hydraena ovata Janssens, 1961
Hydraena oxiana Janssens, 1974
Hydraena ozarkensis Perkins, 1980
Hydraena pachyptera Apfelbeck, 1909
Hydraena pacifica Perkins, 1980
Hydraena paeminosa Perkins, 1980
Hydraena pagaluensis Hernando & Ribera, 2001
Hydraena paganettii Ganglbauer, 1901
Hydraena pakistanica Jäch, 1992
Hydraena palawanensis Freitag & Jäch, 2007
Hydraena pallidula Sainte-Claire Deville, 1909
Hydraena palustris Erichson, 1837
Hydraena pamirica Jäch, 1992
Hydraena pamphylia Jäch & Díaz, 2001
Hydraena pangaei Jäch, 1992
Hydraena paraguayensis Janssens, 1972
Hydraena parciplumea Perkins, 2007
Hydraena particeps Perkins, 1980
Hydraena parva Zwick, 1977
Hydraena parysatis Janssens, 1981
Hydraena paucistriata Jäch & Díaz, 2000
Hydraena pavicula Perkins, 1980
Hydraena pelops Jäch, 1995
Hydraena pensylvanica Kiesenwetter, 1849
Hydraena perkinsi Spangler, 1980
Hydraena perlonga Balfour-Browne, 1950
Hydraena persica Janssens, 1981
Hydraena peru Perkins, 1980
Hydraena petila Perkins, 1980
Hydraena phallerata Orchymont, 1944
Hydraena phallica Orchymont, 1930
Hydraena phassilyi Orchymont, 1931
Hydraena philippi Jäch & Díaz, 2005
Hydraena philyra Orchymont, 1944
Hydraena phoenicia Jäch, Díaz & Dia in Jäch, Dia & Díaz, 2006
Hydraena pici Sainte-Claire Deville, 1905
Hydraena pilipes Zwick, 1977
Hydraena pindica Janssens, 1965
Hydraena planata Kiesenwetter, 1849
Hydraena plastica Orchymont, 1943
Hydraena platycnemis Jäch, 1988
Hydraena platynaspis Jäch, 1988
Hydraena platysoma Janssens, 1968
Hydraena plaumanni Orchymont, 1937
Hydraena plumipes Rey, 1886
Hydraena plurifurcata Jäch & Díaz, 1998
Hydraena polita Kiesenwetter, 1849
Hydraena pontequula Perkins, 1980
Hydraena pontica Janssens, 1963
Hydraena porchi Perkins, 2007
Hydraena porcula Jäch & Díaz, 1998
Hydraena praetermissa Jäch, 1987
Hydraena premordica Perkins, 1980
Hydraena pretneri Chiesa, 1927
Hydraena prieto Perkins, 1980
Hydraena princeps Fauvel, 1903
Hydraena producta Mulsant & Rey, 1852
Hydraena prokini Jäch & Díaz, 2006
Hydraena prusensis Jäch, 1992
Hydraena pseudocirrata Skale & Jäch in Jäch & Skale, 2009
Hydraena pseudopalawanensis Freitag & Jäch, 2007
Hydraena pseudoriparia Orchymont, 1945
Hydraena puetzi Jäch, 1994
Hydraena pugillista Perkins, 2007
Hydraena pulchella Germar, 1824
Hydraena pulsatrix Perkins, 1980
Hydraena punctata LeConte, 1855
Hydraena puncticollis Sharp, 1882
Hydraena putearius Jäch & Díaz, 2000
Hydraena pygmaea Waterhouse, 1833
Hydraena quadrata (Janssens, 1980)
Hydraena quadricollis Wollaston, 1864
Hydraena quadricurvipes Perkins, 1980
Hydraena quechua Perkins, 1980
Hydraena queenslandica Perkins, 2007
Hydraena quetiae Castro, 2000
Hydraena quilisi Lagar, Fresneda & Fernando, 1987
Hydraena regimbarti Zaitzev, 1908
Hydraena reticulata Zwick, 1977
Hydraena reticuloides Perkins, 2007
Hydraena reticulositis Perkins, 2007
Hydraena revelovela Perkins, 2007
Hydraena reyi Kuwert, 1888
Hydraena rhinoceros (Janssens, 1972)
Hydraena rhodia Jäch, 1985
Hydraena riberai Jäch, Aguilera, and Hernando, 1998
Hydraena richardimbi Jäch, 1992
Hydraena rigua Orchymont, 1931
Hydraena ripaeaureae (Janssens, 1972)
Hydraena riparia Kugelann, 1794
Hydraena rivularis Guillebeau, 1896
Hydraena robusta Zwick, 1977
Hydraena rosannae Audisio, Trizzino & De Biase in Audio, Trizzino, De Biase, Mancini & Antonini, 2009
Hydraena rudallensis Blackburn, 1896
Hydraena rufipennis Boscá Berga, 1932
Hydraena rufipes Curtis, 1830
Hydraena rugosa Mulsant, 1844
Hydraena ruinosa Zwick, 1977
Hydraena rukiyeae Kasapoglu, Jäch & Skale, 2010
Hydraena sabella Perkins, 1980
Hydraena saga Orchymont, 1930
Hydraena sahlbergi Orchymont, 1923
Hydraena samia Jäch, 1986
Hydraena samnitica Knisch, 1924
Hydraena sanfilippoi (Audisio & De Biase, 1995)
Hydraena sappho Janssens, 1965
Hydraena sardoa Binaghi, 1961
Hydraena satoi Jäch & Díaz, 1999
Hydraena sautakei Jäch & Díaz, 1999
Hydraena sauteri Orchymont, 1913
Hydraena scabra Orchymont, 1925
Hydraena scabrosa Orchymont, 1931
Hydraena schawalleri Skale & Jäch in Jäch & Skale, 2009
Hydraena schilfii Jäch, 1988
Hydraena schillhammeri Jäch, 1988
Hydraena schmidi Jäch & Díaz, 2001
Hydraena schoedli Jäch, 1992
Hydraena schoenmanni Jäch, 1988
Hydraena schubertorum Jäch & Díaz, 2001
Hydraena schuelkei Jäch, 1992
Hydraena schuleri Ganglbauer, 1901
Hydraena scintilla Perkins, 1980
Hydraena scintillabella Perkins, 1980
Hydraena scintillutea Perkins, 1980
Hydraena scitula Orchymont, 1943
Hydraena scolops Perkins, 1980
Hydraena scopula Perkins, 1980
Hydraena scythica Janssens, 1974
Hydraena septemlacuum Jäch, 1992
Hydraena serpentina Jäch, 1988
Hydraena serricollis Wollaston, 1864
Hydraena servilia Orchymont, 1936
Hydraena sharmai Skale & Jäch in Jäch & Skale, 2009
Hydraena sharpi Rey, 1886
Hydraena sicula Kiesenwetter, 1849
Hydraena sidon Jäch, Díaz & Dia in Jäch, Dia & Díaz, 2006
Hydraena sierra Perkins, 1980
Hydraena similis Orchymont, 1930
Hydraena simonidea Orchymont, 1931
Hydraena simplicicollis Blackburn, 1896
Hydraena simplipes Zwick, 1977
Hydraena sinope Jäch, 1992
Hydraena smyrnensis Sahlberg, 1908
Hydraena socius Jäch & Díaz, 1999
Hydraena solarii Pretner, 1930
Hydraena solodovnikovi Jäch & Díaz, 2006
Hydraena sordida Sharp, 1882
Hydraena spangleri Perkins, 1980
Hydraena speciosa Orchymont, 1944
Hydraena spinipes Baudi, 1882
Hydraena spinissima Perkins, 2007
Hydraena splecoma Perkins, 1980
Hydraena squalida Orchymont, 1932
Hydraena stefani Jäch & Díaz, 2005
Hydraena storeyi Perkins, 2007
Hydraena stussineri Kuwert, 1888
Hydraena subacuminata Rey, 1884
Hydraena subgrandis Jäch, 1988
Hydraena subimpressa Rey, 1885
Hydraena subina Orchymont, 1944
Hydraena subinflata Orchymont, 1944
Hydraena subinoides Orchymont, 1944
Hydraena subintegra Ganglbauer, 1901
Hydraena subinura Orchymont, 1944
Hydraena subirregularis Pic, 1918
Hydraena subjuncta Orchymont, 1930
Hydraena sublamina Orchymont, 1945
Hydraena sublapsa Orchymont, 1945
Hydraena subsequens Rey, 1886
Hydraena szechuanensis Pu, 1951
Hydraena takin Skale & Jäch in Jäch & Skale, 2009
Hydraena tarvisina (Ferro, 1992)
Hydraena tatii Sáinz-Cantero & Alba-Tercedor, 1989
Hydraena tauricola Jäch, 1988
Hydraena taxila Janssens, 1962
Hydraena tenjikuana Satô, 1979
Hydraena tenuis (Janssens, 1980)
Hydraena tenuisella Perkins, 2007
Hydraena tenuisoror Perkins, 2007
Hydraena terebrans Jäch, 1992
Hydraena terralta Perkins, 1980
Hydraena testacea Curtis, 1830
Hydraena textila Perkins, 2007
Hydraena thienemanni Orchymont, 1932
Hydraena thyene Balfour-Browne, 1958
Hydraena trapezoidalis Zwick, 1977
Hydraena tricantha Zwick, 1977
Hydraena tridisca Perkins, 2007
Hydraena triloba Perkins, 2007
Hydraena trinidensis Perkins, 1980
Hydraena triparamera Jäch, 1982
Hydraena truncata Rey, 1885
Hydraena tubuliphallis Jäch, 1982
Hydraena tucumanica Perkins, 1980
Hydraena tuolumne Perkins, 1980
Hydraena turcica Janssens, 1965
Hydraena turrialba Perkins, 1980
Hydraena tyrrhena Binaghi, 1961
Hydraena unca Valladares, 1989
Hydraena undevigintioctogintasisyphos Jäch & Díaz, 2005
Hydraena undulata Jäch & Díaz, 1998
Hydraena uzbekistanica Jäch, 1994
Hydraena vandykei Orchymont, 1923
Hydraena vedrasi Orchymont, 1931
Hydraena vela Perkins, 1980
Hydraena verberans Jäch & Díaz, 2006
Hydraena verstraeteni Ferro, 1984
Hydraena victoriae Jäch & Díaz, 1999
Hydraena vietnamensis (Janssens, 1972)
Hydraena virginalis Janssens, 1963
Hydraena vodozi Sainte-Claire Deville, 1908
Hydraena vulgaris Jäch & Díaz, 2000
Hydraena waldheimi Jäch, 1987
Hydraena wangi Jäch & Díaz, 1998
Hydraena wangmiaoi Jäch & Díaz, 2005
Hydraena watanabei Jäch & Satô, 1988
Hydraena wattsi Perkins, 2007
Hydraena weigeli Skale & Jäch in Jäch & Skale, 2009
Hydraena weiri Perkins, 2007
Hydraena wencke Skale & Jäch in Jäch & Skale, 2009
Hydraena wewalkai Jäch, 1988
Hydraena williamsensis Deane, 1931
Hydraena wittmeri Satô, 1979
Hydraena wolfi Skale & Jäch in Jäch & Skale, 2009
Hydraena wrasei Jäch, 1992
Hydraena yonaguniensis Jäch & Díaz, 2003
Hydraena yosemitensis Perkins, 1980
Hydraena yoshitomii Jäch & Díaz, 1999
Hydraena youngi Perkins, 1980
Hydraena ypsilon Zwick, 1977
Hydraena yunnanensis Pu, 1942
Hydraena zapatina Perkins, 1980
Hydraena zelandica Ordish, 1984
Hydraena zetteli Freitag & Jäch, 2007
Hydraena zezerensis Díaz Pazos & Bilton, 1995
Hydraena zwicki Perkins, 2007
- Hydraena Kugelann, 1794