# Hydraena

Hydraena est un genre d'insectes coléoptères aquatiques de la famille des Hydraenidae.

## Liste d'espèces

* Hydraena abbasigili Jäch, 1988
* Hydraena abdita Orchymont, 1948
* Hydraena abyssinica Régimbart, 1905
* Hydraena accurata Orchymont, 1948
* Hydraena achaica Jäch, 1995
* Hydraena acumena Perkins, 2011
* Hydraena adelbertensis Perkins, 2011
* Hydraena adrastea Orchymont, 1948
* Hydraena aethaliensis Breit, 1917
* Hydraena affirmata Perkins, 2007
* Hydraena affusa Orchymont, 1936
* Hydraena africana Kuwert, 1888
* Hydraena akameku Perkins, 2011
* 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 Gonzalez, 1993
* Hydraena altapapua Perkins, 2011
* Hydraena alternata Perkins, 1980
* Hydraena alterra Perkins, 1980
* Hydraena alticola Skale and Jäch, 2008
* Hydraena altiphila Perkins, 2011
* Hydraena amazonica Perkins, 2011
* Hydraena ambiflagellata Zwick, 1977
* Hydraena ambigua Ganglbauer 1901
* Hydraena ambiosina Perkins, 2007
* Hydraena ambra Perkins, 2011
* Hydraena ambripes Perkins, 2011
* Hydraena ambroides Perkins, 2011
* Hydraena americana Jäch, 1993
* Hydraena amidensis Jäch, 1988
* Hydraena ampla Perkins, 2011
* Hydraena anaphora Perkins, 1980
* Hydraena anatolica Janssens, 1963
* 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, & Hernando, 1998
* Hydraena antiochena Jäch, 1988
* Hydraena apertista Perkins, 2011
* Hydraena apexa Perkins, 2011
* Hydraena appalachicola Perkins, 1980
* Hydraena appetita Perkins, 2007
* Hydraena aquila Perkins, 2011
* 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 aroensis Ferro, 1991 stat. nov.
* Hydraena arunensis Jäch & Skale, 2009
* Hydraena ascensa Perkins, 2007
* Hydraena assimilis Rey 1885
* Hydraena athertonica Perkins, 2007
* Hydraena atrata Desbrochers des Loges, 1891
* Hydraena atroscintilla Perkins, 2011
* Hydraena attaleiae Ferro, 1984
* Hydraena audisioi Jäch, 1992
* Hydraena aulaarta Perkins, 2011
* Hydraena aurita Jäch, 1988
* Hydraena australica Zwick, 1977
* Hydraena australula Perkins, 2007
* Hydraena austrobesa Perkins, 2011
* Hydraena avuncula Jäch, 1988
* Hydraena bacchusi Perkins, 2011
* Hydraena bactriana Janssens, 1962
* Hydraena balearica Orchymont, 1930
* Hydraena balfourbrownei Bameul, 1986
* Hydraena balkei Perkins, 2011
* Hydraena balli Orchymont, 1940
* Hydraena barbipes Zwick, 1977
* Hydraena barricula Perkins, 1980
* Hydraena barrosi Orchymont, 1934
* Hydraena bedeli Barthélemy, 1992
* Hydraena belgica d’Orchymont, 1930
* Hydraena beniensis Perkins, 2011
* Hydraena benjaminus Jäch & Díaz, 2006
* Hydraena bensae Ganglbauer, 1901
* Hydraena bergeri Janssens, 1972
* Hydraena berthelemyana Jäch, Dia & Díaz, 2006
* Hydraena berytus Jäch, 1986
* Hydraena beyarslani Jäch, 1988
* Hydraena bicarinova Perkins, 2011
* Hydraena bicolorata Jäch, 1997
* Hydraena bicuspidata Ganglbauer 1901
* Hydraena bicuspidata Ganglbauer, 1901
* Hydraena bidefensa Perkins, 2007
* Hydraena bifunda Perkins, 2011
* Hydraena bihamata Champion, 1920
* Hydraena biimpressa Perkins, 2007
* Hydraena billi Zwick, 1977
* Hydraena bilobata Jäch & Díaz, 1998
* Hydraena bimagua Jäch, 1986
* Hydraena birendra Jäch & Skale, 2009
* Hydraena bispinosa Pu, 1951
* Hydraena bisulcata Rey, 1884
* Hydraena bitruncata d’Orchymont, 1934
* Hydraena bituberculata Perkins, 1980
* Hydraena biundulata Perkins, 2011
* Hydraena blackburni Zaitzev, 1908
* Hydraena bodemeyeri Jäch and Díaz, 2001
* Hydraena boetcheri Orchymont, 1932
* Hydraena bolivari Orchymont, 1936
* Hydraena boliviana Perkins, 2011
* Hydraena bononiensis Binaghi, 1960
* Hydraena bononiensis Chiesa, 1959
* Hydraena borbonica Fairmaire, 1898
* Hydraena bosnica Apfelbeck, 1909
* Hydraena brachymera Orchymont, 1936
* Hydraena bractea Perkins, 1980
* Hydraena bractoides Perkins, 1980
* Hydraena brahmin Perkins, 2011
* 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 bubulla Perkins, 2011
* Hydraena bulgarica Breit, 1916
* Hydraena buloba Perkins, 2011
* Hydraena buquintana Perkins, 2011
* Hydraena buscintilla Perkins, 2011
* 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 carinocisiva Perkins, 2011
* Hydraena carinulata Rey, 1886
* Hydraena carmellita Perkins, 2011
* Hydraena carniolica Pretner, 1970
* Hydraena castanea Deane, 1937
* Hydraena castanescens Freitag & Jäch, 2007
* Hydraena cata d’Orchymont, 1936
* Hydraena cata Orchymont, 1943
* Hydraena catalonica Fresneda, Aguilera & Hernando, 1994
* Hydraena catherinae Bameul & Jäch, 2001
* Hydraena caucasica Kuwert, 1888
* Hydraena cavifrons Perkins, 2011
* Hydraena cephalleniaca Jäch, 1985
* Hydraena cervisophila Jäch, 1992
* Hydraena challeti Perkins, 2011
* Hydraena cheesmanae Perkins, 2011
* Hydraena chenae Pu 1951
* Hydraena chersonesica Jäch, Díaz & Przewozny, 2007
* Hydraena cherylbarrae Perkins, 2011
* 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 clarinis Perkins, 2011
* Hydraena claudia Freitag and Jäch, 2007
* Hydraena clavigera Zwick, 1977
* Hydraena clemens Jäch & Díaz, 2006
* Hydraena clinodorsa Perkins, 2011
* Hydraena clystera Perkins, 2011
* Hydraena cochabamba Perkins, 2011
* Hydraena colchica Janssens, 1963
* Hydraena colombiana Perkins, 1980
* Hydraena colorata Perkins, 2011
* Hydraena colymba Perkins, 1980
* Hydraena compressipilis Jäch & Díaz, 1998
* Hydraena concepcionica Perkins, 2011
* Hydraena concinna Orchymont, 1932
* Hydraena confluenta Perkins, 2011
* Hydraena confusa Pu, 1951
* Hydraena connexa Orchymont, 1932
* Hydraena converga Perkins, 2007
* Hydraena coomani Orchymont, 1932
* Hydraena cooperi Balfour-Browne, 1954
* Hydraena copulata Perkins, 2011
* Hydraena cordata Schaufuss, 1883
* Hydraena cordiformis Jäch & Díaz, 2000
* Hydraena cordispina Perkins, 2011
* 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 cunicula Perkins, 2011
* Hydraena cunninghamensis Perkins, 2007
* Hydraena curta Kiesenwetter, 1849
* Hydraena curtipalpis Jäch & Díaz, 1998
* Hydraena curvosa Perkins, 2011
* Hydraena cuspidicollis Perkins, 1980
* Hydraena cyclops Jäch & Díaz, 2000
* Hydraena cygnus Zwick, 1977
* Hydraena czernohorskyi J. Müller, 1911
* Hydraena d-concava Perkins, 2011
* Hydraena dalmatina Ganglbauer, 1901
* Hydraena damascena Pic, 1910
* Hydraena dariensis Perkins, 2011
* Hydraena darwini Perkins, 2007
* Hydraena d-destina Perkins, 1980
* Hydraena debeckeri Janssens, 1972
* Hydraena decepta Perkins, 2011
* 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, 1824
* Hydraena dentipes Germar, 1842
* Hydraena devillei Ganglbauer, 1901
* Hydraena devincta d’Orchymont, 1940
* Hydraena diadema Perkins, 2011
* Hydraena diazi Trizzino, Jäch & Ribera, 2011
* Hydraena diffusa Perkins, 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 Jäch & Skale, 2009
* Hydraena dolichogaster Janssens, 1965
* Hydraena dorrigoensis Perkins, 2007
* Hydraena draconisaurati Jäch & Díaz, 2005
* Hydraena dudgeoni Perkins, 2011
* Hydraena duohamata Perkins, 2011
* Hydraena ebriimadli Jäch, 1988
* Hydraena ecuadormica Perkins, 2011
* Hydraena egoni Jäch, 1986
* Hydraena eichleri Orchymont 1937
* Hydraena einsteini Perkins, 2011
* Hydraena elisabethae Jäch, 1992
* Hydraena eliya Jäch, 1982
* Hydraena emarginata Rey, 1885
* Hydraena emineae Jäch & Kasapoglu, 2006
* Hydraena epeirosi Ferro, 1985
* Hydraena errina Orchymont, 1948
* Hydraena erythraea Régimbart, 1905
* Hydraena eryx Orchymont, 1948
* Hydraena essentia Perkins, 2011
* Hydraena eucnemis Janssens, 1970
* Hydraena evanescens Rey, 1884
* Hydraena evansi Balfour-Browne, 1945
* Hydraena exarata Kiesenwetter, 1866
* Hydraena exasperata d’Orchymont, 1935
* Hydraena excisa Kiesenwetter, 1849
* Hydraena exhalista Perkins, 2011
* Hydraena exilipes Perkins, 1980
* Hydraena expedita Jäch & Skale, 2009
* Hydraena explanata Pic 1905
* Hydraena extorris Zwick, 1977
* Hydraena falcata Jäch, 1992
* Hydraena fasciata Perkins, 2011
* Hydraena fascinata Perkins, 2011
* Hydraena fasciola Perkins, 2011
* Hydraena fasciolata Perkins, 2011
* Hydraena fasciopaca Perkins, 2011
* Hydraena fenestella Perkins, 2011
* Hydraena ferethula Perkins, 2007
* Hydraena feuerborni Orchymont, 1932
* Hydraena fijiensis Balfour-Browne, 1945
* Hydraena filum Sahlberg, 1908
* Hydraena finita Orchymont, 1943
* Hydraena finki Jäch & Skale, 2009
* Hydraena finniganensis Perkins, 2007
* Hydraena fiorii Porta, 1899
* Hydraena fischeri Schönmann, 1991
* Hydraena flagella Perkins, 2011
* Hydraena fluvicola Perkins, 1980
* Hydraena foliobba Perkins, 2011
* Hydraena fontana Orchymont, 1932
* Hydraena fontiscarsavii Jäch, 1988
* Hydraena formosopala Perkins, 2011
* Hydraena formula Orchymont, 1932
* Hydraena forticollis Perkins, 2007
* Hydraena fosterorum Trizzino, Jäch & Ribera, 2011
* Hydraena freitagi Jäch & Skale, 2009
* Hydraena frenzeli Skale & Jäch, 2008
* Hydraena fritzi Jäch, 1992
* Hydraena frondsicola (Perkins, 1980)
* Hydraena funda Perkins, 2011
* Hydraena fundacta Perkins, 2011
* Hydraena fundaequalis Perkins, 2007
* Hydraena fundapta Perkins, 2011
* Hydraena fundarca Perkins, 2011
* Hydraena fundata Perkins, 2007
* Hydraena fundextra Perkins, 2011
* Hydraena furthi Jäch, 1982
* Hydraena gaditana Lagar & Fresneda, 1990
* Hydraena galatica Janssens, 1970
* Hydraena galea Perkins, 2011
* Hydraena gattolliati
* 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 gracilidelphis Trizzino, Valladares, Garrido & Audisio, 2012
* 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 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 gynaephila Jäch, 1997
* 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 herzogestella Perkins, 2011
* Hydraena heterogyna Bedel
* Hydraena hiekei Jäch, 1992
* Hydraena hillaryi Jäch & Skale, 2009
* Hydraena hintoni Perkins, 2011
* Hydraena hispanica Ganglbauer, 1901
* Hydraena holdhausi Pretner, 1929
* Hydraena hornabrooki Perkins, 2011
* Hydraena hortensis Jäch & Díaz, 2000
* Hydraena hosiwergi Freitag and 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 huonica Perkins, 2011
* Hydraena hyalina Perkins, 1980
* Hydraena hynesi Zwick, 1977
* Hydraena hypipamee Perkins, 2007
* Hydraena ibalimi Perkins, 2011
* Hydraena iberica d’Orchymont, 1936
* Hydraena idema Perkins, 2011
* Hydraena iheya Jäch & Díaz, 1999
* Hydraena ilamensis Jäch & Skale, 2009
* Hydraena ilica Jäch, 1994
* Hydraena imbria Jäch & Díaz, 2001
* Hydraena impala Perkins, 2011
* Hydraena imperatrix Kniz, 1919
* Hydraena impercepta Zwick, 1977
* Hydraena impressicollis Fairmaire, 1898
* Hydraena inancala Perkins, 2007
* Hydraena inapicipalpis Pic, 1918
* Hydraena incisiva Perkins, 2011
* Hydraena incista Perkins, 2011
* Hydraena incurva Orchymont, 1932
* Hydraena indiana Jäch, 1994
* Hydraena indica Orchymont, 1920
* Hydraena infoveola Perkins, 2011
* Hydraena ingens Perkins, 1980
* Hydraena inhalista Perkins, 2011
* Hydraena innuda Perkins, 2007
* Hydraena inopinata Jäch & Díaz, 1998
* Hydraena inplacopaca Perkins, 2011
* Hydraena insandalia Perkins, 2011
* Hydraena insita Orchymont, 1932
* Hydraena insolita Orchymont, 1932
* Hydraena insularis Orchymont, 1945
* Hydraena integra Pretner, 1931
* Hydraena intensa Perkins, 2011
* 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 Jäch & Skale, 2009
* Hydraena jailensis Breit, 1917
* Hydraena janczyki Jäch, 1992
* Hydraena janeceki Jäch, 1987
* Hydraena janssensi Nilsson, 2001
* Hydraena jengi Jäch and Díaz, 1998
* Hydraena jilanzhui Jäch & Díaz, 2005
* Hydraena jivaro Perkins, 1980
* Hydraena johncoltranei Perkins, 2011
* Hydraena jubilata Perkins, 2011
* Hydraena kakadu Perkins, 2007
* Hydraena karinkukolae Jäch, 1989
* Hydraena karmai Jäch & Skale, 2009
* Hydraena kasyi Jäch, 1992
* Hydraena kaufmanni Ganglbauer 1901
* Hydraena kellymilleri Perkins, 2011
* Hydraena khnzoriani Janssens, 1968
* Hydraena kilimandjarensis Régimbart, 1906
* Hydraena knischi Orchymont, 1928
* Hydraena kocheri Berthélemy, 1992
* Hydraena kodadai Freitag & Jäch, 2007
* Hydraena koje Perkins, 2011
* Hydraena koma Perkins, 2011
* Hydraena krasnodarensis Jäch & Díaz, 2006
* Hydraena kroumiriana Kaddouri, 1992
* Hydraena kucinici
* Hydraena kuehnelti Jäch, 1989
* Hydraena kurdistanica Jäch, 1988
* Hydraena kwangsiensis Pu, 1951
* Hydraena labropaca Perkins, 2011
* Hydraena lapidicola Kiesenwetter, 1849
* Hydraena lapissectilis Jäch, 1992
* Hydraena larissae Jäch & Díaz, 2000
* Hydraena larsoni Perkins, 2007
* Hydraena lassulipes Perkins, 2011
* Hydraena latebricola Jäch, 1986
* Hydraena latisoror Perkins, 2007
* Hydraena lazica Janssens, 1963
* Hydraena leechi Perkins, 1980
* Hydraena leei Jäch & Díaz, 1998
* Hydraena legorskyi
* Hydraena lehmanni Jäch and Díaz, 2005
* Hydraena leonhardi Breit, 1916
* Hydraena leprieuri Sainte-Claire Deville, 1905
* Hydraena levantina Sahlberg, 1908
* Hydraena ligulipes Jäch, 1988
* Hydraena lilianae Perkins, 2011
* Hydraena limbobesa Perkins, 2011
* Hydraena limpidicollis Perkins, 1980
* Hydraena liriope Orchymont, 1943
* Hydraena longicollis Sharp 1882
* Hydraena loripes Perkins, 2011
* 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 maculopala Perkins, 2011
* Hydraena madronensis Castro, Garcia & 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 manabica Perkins, 2011
* Hydraena manaslu Jäch & Skale, 2009
* Hydraena manfredjaechi Delgado & Soler, 1991
* Hydraena manguao Freitag & Jäch, 2007
* Hydraena manulea Perkins, 2011
* Hydraena manuloides Perkins, 2011
* Hydraena marawaka Perkins, 2011
* Hydraena marcosae Aguilera, Hernando & Ribera, 1997
* Hydraena marginicollis Kiesenwetter, 1849
* Hydraena mariannae Jäch, 1992
* Hydraena marinae Castro, 2003
* Hydraena martensi Jäch & Skale, 2009
* Hydraena martinschoepfi Jäch & Díaz, 2005
* Hydraena masatakai Jäch & Díaz, 2003
* Hydraena maureenae Perkins, 1980
* Hydraena mauriciogarciai Perkins, 2011
* Hydraena mazamitla Perkins, 1980
* Hydraena mecai Millán & Aguilera, 2000
* Hydraena melas Dalla Torre 1877
* Hydraena mercuriala Perkins, 2011
* Hydraena meschniggi Pretner, 1929
* Hydraena metzeni Perkins, 2007
* Hydraena mexicana Perkins, 1980
* Hydraena mianminica Perkins, 2011
* Hydraena mignymixys Perkins, 1980
* Hydraena millerorum Perkins, 2007
* Hydraena miniretia Perkins, 2007
* Hydraena mintrita Perkins, 2011
* 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 multiloba Perkins, 2011
* Hydraena multispina Perkins, 2011
* Hydraena mylasae Jäch, 1992
* Hydraena nanocolorata Perkins, 2011
* Hydraena nanopala Perkins, 2011
* Hydraena nanoscintilla Perkins, 2011
* Hydraena neblina Perkins, 2011
* 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 nitidimenta Perkins, 2011
* Hydraena nivalis Jäch, 1992
* Hydraena notsui Sato, 1978
* Hydraena novacula Perkins, 2011
* 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 okapa Perkins, 2011
* Hydraena okinawensis Jäch & Díaz, 1999
* Hydraena olidipastoris Jäch, 1988
* Hydraena ollopa Perkins, 2011
* Hydraena orchis Jäch and Díaz, 1998
* Hydraena orcula Perkins, 1980
* Hydraena ordishi Delgado & Palma, 1997
* Hydraena orientalis Breit, 1916
* Hydraena ortali Jäch, 1986
* Hydraena orthosia Jäch, Dia & Díaz, 2006
* Hydraena otiarca Perkins, 2011
* Hydraena ovata Janssens, 1961
* Hydraena owenobesa Perkins, 2011
* Hydraena oxiana Janssens, 1974
* Hydraena ozarkensis Perkins, 1980
* Hydraena pachyptera Apfelbeck, 1909
* Hydraena pacifica Perkins, 1980
* Hydraena pacificica Perkins, 2011
* Hydraena paeminosa Perkins, 1980
* Hydraena pagaluensis Hernando & Ribera, 2001
* Hydraena paganettii Ganglbauer, 1901
* Hydraena pakistanica Jäch, 1992
* Hydraena pala Perkins, 2011
* Hydraena palamita Perkins, 2011
* 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 pantanalensis Perkins, 2011
* 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 paxillipes Perkins, 2011
* Hydraena peckorum Perkins, 2011
* Hydraena pectenata Perkins, 2011
* Hydraena pedroaguilerai Perkins, 2011
* Hydraena pegopyga Perkins, 2011
* Hydraena pelops Jäch, 1995
* Hydraena pensylvanica Kiesenwetter 1849
* Hydraena penultimata Perkins, 2011
* Hydraena perkinsi Spangler, 1980
* Hydraena perlonga Balfour-Browne, 1950
* Hydraena perpunctata Perkins, 2011
* Hydraena persica Janssens, 1981
* Hydraena pertransversa Perkins, 2011
* Hydraena peru Perkins, 1980
* Hydraena petila Perkins, 1980
* Hydraena phainops Perkins, 2011
* Hydraena phallerata Orchymont 1944
* Hydraena phallica d’Orchymont, 1930
* Hydraena phassilyi Orchymont, 1931
* Hydraena philippi Jäch and Díaz, 2005
* Hydraena philyra Orchymont, 1944
* Hydraena phoenicia Jäch, Dia & Díaz, 2006
* Hydraena photogenica Perkins, 2011
* Hydraena pici Sainte-Claire Deville, 1905
* Hydraena picula Perkins, 2011
* Hydraena pilipes Zwick, 1977
* Hydraena pilulambra Perkins, 2011
* Hydraena pindica Janssens, 1965
* Hydraena planata Kiesenwetter, 1849
* Hydraena planata Kiesenwetter, 1849
* Hydraena plastica d’Orchymont, 1943
* Hydraena platycnemis Jäch, 1988
* Hydraena platynaspis Jäch, 1988
* Hydraena platysoma Janssens, 1968
* Hydraena plaumanni Orchymont, 1937
* Hydraena plumipes Rey 1886
* Hydraena pluralticola Perkins, 2011
* Hydraena plurifurcata Jäch & Díaz, 1998
* Hydraena polita Kiesenwetter, 1849
* Hydraena pontequula Perkins, 1980
* Hydraena pontica Janssens, 1963
* Hydraena porchi Perkins, 2007
* Hydraena porcula Jäch and Díaz, 1998
* Hydraena praetermissa Jäch, 1987
* Hydraena premordica Perkins, 1980
* Hydraena pretneri Chiesa, 1927
* Hydraena prieto Perkins, 1980
* Hydraena princeps Fauvel, 1903
* Hydraena processa Perkins, 2011
* Hydraena producta Mulsant & Rey, 1852
* Hydraena prokini Jäch & Díaz, 2006
* Hydraena propria Perkins, 2011
* Hydraena prusensis Jäch, 1992
* Hydraena pseudocirrata 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 punctilata Perkins, 2011
* Hydraena putearius Jäch & Díaz, 2000
* Hydraena pygmaea Waterhouse, 1833
* Hydraena quadrata (Janssens, 1980)
* Hydraena quadricollis Wollaston 1864
* Hydraena quadricurvipes Perkins, 1980
* Hydraena quadriplumipes Perkins, 2011
* Hydraena quechua Perkins, 1980
* Hydraena queenslandica Perkins, 2007
* Hydraena quetiae Castro, 2000
* Hydraena quilisi Lagar, Fresneda & Fernando, 1987
* Hydraena quintana Perkins, 2011
* Hydraena ramuensis Perkins, 2011
* Hydraena ramuquintana Perkins, 2011
* Hydraena receptiva Perkins, 2011
* Hydraena regimbarti Zaitzev, 1908
* Hydraena remulipes Perkins, 2011
* Hydraena reticulata Zwick, 1977
* Hydraena reticulobesa Perkins, 2011
* Hydraena reticuloides Perkins, 2007
* Hydraena reticulositis Perkins, 2007
* Hydraena revelovela Perkins, 2007
* Hydraena reverberata Perkins, 2011
* Hydraena reyi Kuwert, 1888
* Hydraena rhinoceros Janssens, 1972
* Hydraena rhodia Jäch, 1985
* Hydraena riberai Jäch, Aguilera, & 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 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 d’Orchymont, 1930
* Hydraena sagatai Perkins, 2011
* Hydraena sahlbergi Orchymont, 1923
* Hydraena saluta Perkins, 2011
* Hydraena samia Jäch, 1986
* Hydraena samnitica Fiori, 1904
* 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 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 schuleri Ganglbauer, 1901
* Hydraena scintilla Perkins, 1980
* Hydraena scintillabella Perkins, 1980
* Hydraena scintillamima Perkins, 2011
* Hydraena scintillapicta Perkins, 2011
* Hydraena scintillarca Perkins, 2011
* Hydraena scintillutea Perkins, 1980
* Hydraena scitula d’Orchymont, 1943
* Hydraena scolops Perkins, 1980
* Hydraena scopula Perkins, 1980
* Hydraena scythica Janssens, 1974
* Hydraena sepikramuensis Perkins, 2011
* Hydraena septemlacuum Jäch, 1992
* Hydraena serpentina Jäch, 1988
* Hydraena serricollis Wollaston, 1864
* Hydraena servilia Orchymont, 1936
* Hydraena sexarcuata Perkins, 2011
* Hydraena sexsuprema Perkins, 2011
* Hydraena sharmai Jäch & Skale, 2009
* Hydraena sharpi Rey, 1886
* Hydraena shorti Perkins, 2011
* Hydraena sicula Kiesenwetter, 1849
* Hydraena sidon 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 and Díaz, 1999
* Hydraena solarii Pretner, 1930
* Hydraena solodovnikovi Jäch & Díaz, 2006
* Hydraena sordida Sharp 1882
* Hydraena spangleri Perkins, 1980
* Hydraena spatula Perkins, 2011
* Hydraena speciosa Orchymont, 1944
* Hydraena spinipes Baudi, 1882
* Hydraena spinissima Perkins, 2007
* Hydraena spinobesa Perkins, 2011
* Hydraena splecoma Perkins, 1980
* Hydraena squalida Orchymont, 1932
* Hydraena stefani Jäch and Díaz, 2005
* Hydraena steineri Perkins, 2011
* Hydraena stellula Perkins, 2011
* Hydraena storeyi Perkins, 2007
* Hydraena striolata Perkins, 2011
* 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 supersexa Perkins, 2011
* Hydraena supina Perkins, 2011
* Hydraena szechuanensis Pu, 1951
* Hydraena takin Jäch & Skale, 2009
* Hydraena takutu Perkins, 2011
* Hydraena tarsotricha Perkins, 2011
* Hydraena tarvisina Ferro, 1991
* Hydraena tatii Sáinz-Cantero & Alba-Tercedor, 1989
* Hydraena tauricola Jäch, 1988
* Hydraena taxila Janssens, 1962
* Hydraena tekmanensis
* 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 tetana Perkins, 2011
* Hydraena textila Perkins, 2007
* Hydraena thienemanni Orchymont, 1932
* Hydraena thola Perkins, 2011
* Hydraena tholasoris Perkins, 2011
* Hydraena thumbelina Perkins, 2011
* Hydraena thumbelipes Perkins, 2011
* Hydraena thyene Balfour-Browne, 1958
* Hydraena tibiopaca Perkins, 2011
* Hydraena tobogan Perkins, 2011
* Hydraena torosopala Perkins, 2011
* Hydraena torricellica Perkins, 2011
* Hydraena transvallis Perkins, 2011
* Hydraena trapezoidalis Zwick, 1977
* Hydraena tricantha Zwick, 1977
* Hydraena trichotarsa Perkins, 2011
* Hydraena tricosipes Perkins, 2011
* Hydraena tridigita Perkins, 2011
* Hydraena tridisca Perkins, 2007
* Hydraena triloba Perkins, 2007
* Hydraena trinidensis Perkins, 1980
* Hydraena triparamera Jäch, 1982
* Hydraena tritropis Perkins, 2011
* Hydraena tritutela Perkins, 2011
* 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 ulna Perkins, 2011
* Hydraena umbolenta Perkins, 2011
* Hydraena unca Valladares, 1989
* Hydraena undevigintioctogintasisyphos Jäch & Díaz, 2005
* Hydraena undulata Jäch & Díaz, 1998
* Hydraena unita Perkins, 2011
* Hydraena uzbekistanica Jäch, 1994
* Hydraena vandykei Orchymont, 1923
* Hydraena variopaca Perkins, 2011
* Hydraena vedrasi d’Orchymont, 1931
* Hydraena vela Perkins, 1980
* Hydraena velvetina Perkins, 2011
* Hydraena venezuela Perkins, 2011
* 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 Jäch & Skale, 2009
* Hydraena weiri Perkins, 2007
* Hydraena wencke Jäch & Skale, 2009
* Hydraena wewalkai Jäch, 1988
* Hydraena williamsensis Deane, 1931
* Hydraena wittmeri Satô, 1979
* Hydraena wolfi Jäch & Skale, 2009
* Hydraena wrasei Jäch, 1992
* Hydraena xingu Perkins, 2011
* 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