List of Hydraena species explained

This is a list of 924 species in Hydraena, a genus of minute moss beetles in the family Hydraenidae.

Hydraena species

• Hydraena abbasigili Jäch, 1988

^{i c g}

• Hydraena abdita Orchymont, 1948

^{i c g}

• Hydraena abyssinica Régimbart, 1905

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• Hydraena accurata Orchymont, 1948

^{i c g}

• Hydraena achaica Jäch, 1995

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• Hydraena acumena Perkins, 2011

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• Hydraena adelbertensis Perkins, 2011

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• Hydraena adrastea Orchymont, 1948

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• Hydraena aethaliensis Breit, 1917

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• Hydraena affirmata Perkins, 2007

^{i c g}

• Hydraena affusa Orchymont, 1936

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• Hydraena africana Kuwert, 1888

^{i c g}

• Hydraena akameku Perkins, 2011

^{i c g}

• Hydraena akbesiana Audisio, De Biase and Jäch, 1993

^{i c g}

• Hydraena albai Sáinz-Cantero, 1993

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• Hydraena alberti Balfour-Browne, 1950

^{i c g}

• Hydraena alcantarana Ienistea, 1985

^{i c g}

• Hydraena algerina Kaddouri, 1992

^{i c g}

• Hydraena alia Orchymont, 1934

^{i c g}

• Hydraena aliciae Jäch and Díaz, 2005

^{i c g}

• Hydraena allomorpha Lagar and Fresneda, 1990

^{i c g}

• Hydraena alluaudi Régimbart, 1906

^{i c g}

• Hydraena alpicola Pretner, 1931

^{i c g}

• Hydraena altamirensis Díaz Pazos and Garrido Gonzalez, 1993

^{i c g}

• Hydraena altapapua Perkins, 2011

^{i c g}

• Hydraena alternata Perkins, 1980

^{i c g}

• Hydraena alterra Perkins, 1980

^{i c g}

• Hydraena alticola Skale and Jäch, 2008

^{i c g}

• Hydraena altiphila Perkins, 2011

^{i c g}

• Hydraena amazonica Perkins, 2011

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• Hydraena ambiflagellata Zwick, 1977

^{i c g}

• Hydraena ambigua Ganglbauer, 1901

^{i c g}

• Hydraena ambiosina Perkins, 2007

^{i c g}

• Hydraena ambra Perkins, 2011

^{i c g}

• Hydraena ambripes Perkins, 2011

^{i c g}

• Hydraena ambroides Perkins, 2011

^{i c g}

• Hydraena americana Jäch, 1993

^{i c g}

• Hydraena amidensis Jäch, 1988

^{i c g}

• Hydraena ampla Perkins, 2011

^{i c g}

• Hydraena anaphora Perkins, 1980

^{i c g}

• Hydraena anatolica Janssens, 1963

^{i c}

• Hydraena ancylis Perkins, 1980

^{i c g}

• Hydraena ancyrae Jäch, 1992

^{i c g}

• Hydraena andalusa Lagar and Fresneda, 1990

^{i c g}

• Hydraena andreinii Orchymont, 1934

^{i c g}

• Hydraena angulicollis Notman, 1921

^{i c g b}

• Hydraena angulosa Mulsant, 1844

^{i c g}

• Hydraena angustata Sturm, 1836

^{i c g}

• Hydraena anisonycha Perkins, 1980

^{i c g}

• Hydraena antaria Perkins, 2007

^{i c g}

• Hydraena antiatlantica Jäch, Aguilera and Hernando, 1998

^{i c g}

• Hydraena antiochena Jäch, 1988

^{i c g}

• Hydraena apertista Perkins, 2011

^{i c g}

• Hydraena apexa Perkins, 2011

^{i c g}

• Hydraena appalachicola Perkins, 1980

^{i c g}

• Hydraena appetita Perkins, 2007

^{i c g}

• Hydraena aquila Perkins, 2011

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• Hydraena arabica Balfour-Browne, 1951

^{i c g}

• Hydraena arachthi Ferro and Jäch, 2000

^{i c g}

• Hydraena arcta Perkins, 2007

^{i c g}

• Hydraena arenicola Perkins, 1980

^{i c g}

• Hydraena argutipes Perkins, 1980

^{i c g}

• Hydraena ariana Janssens, 1962

^{i c g}

• Hydraena arizonica Perkins, 1980

^{i c g}

• Hydraena armata Reitter, 1880

^{i c g}

• Hydraena armatura Perkins, 2014

^{i c g}

• Hydraena armeniaca Janssens, 1968

^{i c g}

• Hydraena armipalpis Jäch and Díaz, 2000

^{i c g}

• Hydraena armipes Rey, 1886

^{i c g}

• Hydraena aroensis (Ferro, 1991)

^{i c g}

• Hydraena arunensis Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena ascensa Perkins, 2007

^{i c g}

• Hydraena assimilis Rey, 1885

^{i c g}

• Hydraena ateneo Freitag, 2013

^{i c g}

• Hydraena athertonica Perkins, 2007

^{i c g}

• Hydraena atrata Desbrochers des Loges, 1891

^{i c g}

• Hydraena atroscintilla Perkins, 2011

^{i c g}

• Hydraena attaleiae Ferro, 1984

^{i c g}

• Hydraena audisioi Jäch, 1992

^{i c g}

• Hydraena aulaarta Perkins, 2011

^{i c g}

• Hydraena aurita Jäch, 1988

^{i c g}

• Hydraena australica Zwick, 1977

^{i c g}

• Hydraena australula Perkins, 2007

^{i c g}

• Hydraena austrobesa Perkins, 2011

^{i c g}

• Hydraena avuncula Jäch, 1988

^{i c g}

• Hydraena bacchusi Perkins, 2011

^{i c g}

• Hydraena bactriana Janssens, 1962

^{i c g}

• Hydraena bakriensis Skale and Jäch, 2011

^{i c g}

• Hydraena balearica Orchymont, 1930

^{i c g}

• Hydraena balfourbrownei Bameul, 1986

^{i c g}

• Hydraena balkei Perkins, 2011

^{i c g}

• Hydraena balli Orchymont, 1940

^{i c g}

• Hydraena barbipes Zwick, 1977

^{i c g}

• Hydraena barricula Perkins, 1980

^{i c g}

• Hydraena barrosi Orchymont, 1934

^{i c g}

• Hydraena bedeli Berthélemy, 1992

^{i c g}

• Hydraena belgica Orchymont, 1930

^{i c g}

• Hydraena beniensis Perkins, 2011

^{i c g}

• Hydraena benjaminus Jäch and Díaz, 2006

^{i c g}

• Hydraena bensae Ganglbauer, 1901

^{i c g}

• Hydraena bergeri (Janssens, 1972)

^{i c g}

• Hydraena berthelemyana Jäch, Díaz and Dia in Jäch, Dia and Díaz, 2006

^{i c g}

• Hydraena berytus Jäch, 1986

^{i c g}

• Hydraena beyarslani Jäch, 1988

^{i c g}

• Hydraena bicarina Perkins, 2014

^{i c g}

• Hydraena bicarinova Perkins, 2011

^{i c g}

• Hydraena bicolorata Jäch, 1997

^{i c g}

• Hydraena bicuspidata Ganglbauer, 1901

^{i c g}

• Hydraena bidefensa Perkins, 2007

^{i c g}

• Hydraena bifunda Perkins, 2011

^{i c g}

• Hydraena bihamata Champion, 1920

^{i c g}

• Hydraena biimpressa Perkins, 2007

^{i c g}

• Hydraena billi Zwick, 1977

^{i c g}

• Hydraena bilobata Jäch and Díaz, 1998

^{i c g}

• Hydraena biltoni Jäch and Díaz, 2012

^{i c g}

• Hydraena bimagua Jäch, 1986

^{i c g}

• Hydraena birendra Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena biseptosa Perkins, 2014

^{i c g}

• Hydraena bispinosa Pu, 1951

^{i c g}

• Hydraena bisulcata Rey, 1884

^{i c g}

• Hydraena bitruncata Orchymont, 1934

^{i c g}

• Hydraena bituberculata Perkins, 1980

^{i c g}

• Hydraena biundulata Perkins, 2011

^{i c g}

• Hydraena blackburni Zaitzev, 1908

^{i c g}

• Hydraena bodemeyeri Jäch and Díaz, 2001

^{i c g}

• Hydraena boetcheri Orchymont, 1932

^{i c g}

• Hydraena bolivari Orchymont, 1936

^{i c g}

• Hydraena boliviana Perkins, 2011

^{i c g}

• Hydraena bononiensis Binaghi, 1960

^{i c g}

• Hydraena borbonica Fairmaire, 1898

^{i c g}

• Hydraena bosnica Apfelbeck, 1909

^{i c g}

• Hydraena brachymera Orchymont, 1936

^{i c g}

• Hydraena bractea Perkins, 1980

^{i c g}

• Hydraena bractoides Perkins, 1980

^{i c g}

• Hydraena brahmin Perkins, 2011

^{i c g}

• Hydraena breedlovei Perkins, 1980

^{i c g}

• Hydraena brevis Sharp, 1882

^{i c g}

• Hydraena britteni Joy, 1907

^{i c g}

• Hydraena brittoni Zwick, 1977

^{i c g}

• Hydraena bromleyae Jäch, 1986

^{i c g}

• Hydraena browni Perkins, 1980

^{i c g}

• Hydraena bubulla Perkins, 2011

^{i c g}

• Hydraena bulgarica Breit, 1916

^{i c g}

• Hydraena buloba Perkins, 2011

^{i c g}

• Hydraena buquintana Perkins, 2011

^{i c g}

• Hydraena buschietanni Freitag, 2021

^{i c g}

• Hydraena buscintilla Perkins, 2011

^{i c g}

• Hydraena busuanga Freitag and Jäch, 2007

^{i c g}

• Hydraena calcarifera Janssens, 1959

^{i c g}

• Hydraena californica Perkins, 1980

^{i c g}

• Hydraena campbelli Perkins, 1980

^{i c g}

• Hydraena canakcioglui Janssens, 1965

^{i c g}

• Hydraena canticacollis Perkins, 1980

^{i c g}

• Hydraena capacis Perkins, 2007

^{i c g}

• Hydraena capensis Perkins, 2014

^{i c g}

• Hydraena capetribensis Perkins, 2007

^{i c g}

• Hydraena cappadocica Jäch, 1988

^{i c g}

• Hydraena caprivica Perkins, 2014

^{i c g}

• Hydraena capta Orchymont, 1936

^{i c g}

• Hydraena carbonaria Kiesenwetter, 1849

^{i c g}

• Hydraena carica Jäch, 1988

^{i c g}

• Hydraena carinocisiva Perkins, 2011

^{i c g}

• Hydraena carinulata Rey, 1886

^{i c g}

• Hydraena carmellita Perkins, 2011

^{i c g}

• Hydraena carniolica Pretner, 1970

^{i c g}

• Hydraena castanea Deane, 1937

^{i c g}

• Hydraena castanescens Freitag and Jäch, 2007

^{i c g}

• Hydraena cata Orchymont, 1936

^{i c g}

• Hydraena catalonica Fresneda, Aguilera and Hernando, 1994

^{i c g}

• Hydraena catherinae Bameul and Jäch, 2001

^{i c g}

• Hydraena caucasica Kuwert, 1888

^{i c g}

• Hydraena cavifrons Perkins, 2011

^{i c g}

• Hydraena cephalleniaca Jäch, 1985

^{i c g}

• Hydraena cervisophila Jäch, 1992

^{i c g}

• Hydraena challeti Perkins, 2011

^{i c g}

• Hydraena cheesmanae Perkins, 2011

^{i c g}

• Hydraena chenae Pu, 1951

^{i c g}

• Hydraena chersonesica Jäch, Díaz and Przewozny, 2007

^{i c g}

• Hydraena cherylbarrae Perkins, 2011

^{i c g}

• Hydraena chiapa Perkins, 1980

^{i c g}

• Hydraena chiesai Janssens, 1965

^{i c g}

• Hydraena chifengi Jäch and Díaz, 1999

^{i c g}

• Hydraena chobauti Guillebeau, 1896

^{i c g}

• Hydraena christinae Audisio, De Biase and Jäch, 1996

^{i c g}

• Hydraena christoferi Jäch and Díaz, 2005

^{i c g}

• Hydraena ciliciensis Jäch, 1988

^{i c g}

• Hydraena circulata Perkins, 1980

^{i c g b}

• Hydraena cirrata Champion, 1920

^{i c g}

• Hydraena clarinis Perkins, 2011

^{i c g}

• Hydraena claudia Freitag and Jäch, 2007

^{i c g}

• Hydraena clavicula Perkins, 2014

^{i c g}

• Hydraena clavigera Zwick, 1977

^{i c g}

• Hydraena clemens Jäch and Díaz, 2006

^{i c g}

• Hydraena clinodorsa Perkins, 2011

^{i c g}

• Hydraena clystera Perkins, 2011

^{i c g}

• Hydraena cochabamba Perkins, 2011

^{i c g}

• Hydraena colchica Janssens, 1963

^{i c g}

• Hydraena colombiana Perkins, 1980

^{i c g}

• Hydraena colorata Perkins, 2011

^{i c g}

• Hydraena colymba Perkins, 1980

^{i c g}

• Hydraena compressipilis Jäch and Díaz, 1998

^{i c g}

• Hydraena concepcionica Perkins, 2011

^{i c g}

• Hydraena concinna Orchymont, 1932

^{i c g}

• Hydraena confluenta Perkins, 2011

^{i c g}

• Hydraena confusa Pu, 1951

^{i c g}

• Hydraena connexa Orchymont, 1932

^{i c g}

• Hydraena converga Perkins, 2007

^{i c g}

• Hydraena coomani Orchymont, 1932

^{i c g}

• Hydraena cooperi Balfour-Browne, 1954

^{i c g}

• Hydraena cooperoides Perkins, 2014

^{i c g}

• Hydraena copulata Perkins, 2011

^{i c g}

• Hydraena cordata Schaufuss, 1883

^{i c g}

• Hydraena cordiformis Jäch and Díaz, 2000

^{i c g}

• Hydraena cordispina Perkins, 2011

^{i c g}

• Hydraena corinna Orchymont, 1936

^{i c g}

• Hydraena cornelli Jäch and Díaz, 1998

^{i c g}

• Hydraena corrugis Orchymont, 1934

^{i c g}

• Hydraena coryleti Jäch, 1992

^{i c g}

• Hydraena costiniceps Perkins, 1980

^{i c g}

• Hydraena crepidoptera Jäch, 1992

^{i c g}

• Hydraena cristatigena Jäch and Díaz, 2000

^{i c g}

• Hydraena croatica Kuwert, 1888

^{i c g}

• Hydraena cryptostoma Jäch, 1992

^{i c g}

• Hydraena crystallina Perkins, 1980

^{i c g}

• Hydraena cubista Perkins, 2007

^{i c g}

• Hydraena cultrata Perkins, 2007

^{i c g}

• Hydraena cunicula Perkins, 2011

^{i c g}

• Hydraena cunninghamensis Perkins, 2007

^{i c g}

• Hydraena curta Kiesenwetter, 1849

^{i c g}

• Hydraena curtipalpis Jäch and Díaz, 1998

^{i c g}

• Hydraena curvipes Jäch and Díaz, 2012

^{i c g}

• Hydraena curvosa Perkins, 2011

^{i c g}

• Hydraena cuspidicollis Perkins, 1980

^{i c g}

• Hydraena cyclops Jäch and Díaz, 2000

^{i c g}

• Hydraena cygnus Zwick, 1977

^{i c g}

• Hydraena czernohorskyi Müller, 1911

^{i c g}

• Hydraena dalmatina Ganglbauer, 1901

^{i c g}

• Hydraena damascena Pic, 1910

^{i c g}

• Hydraena dariensis Perkins, 2011

^{i c g}

• Hydraena darwini Perkins, 2007

^{i c g}

• Hydraena d-concava Perkins, 2011

^{i c g}

• Hydraena d-destina Perkins, 1980

^{i c g}

• Hydraena debeckeri (Janssens, 1972)

^{i c g}

• Hydraena decepta Perkins, 2011

^{i c g}

• Hydraena decipiens Zwick, 1977

^{i c g}

• Hydraena decolor Sainte-Claire Deville, 1903

^{i c g}

• Hydraena decui Spangler, 1980

^{i c g}

• Hydraena delia Balfour-Browne, 1978

^{i c g}

• Hydraena deliquesca Perkins, 2007

^{i c g}

• Hydraena delvasi Delgado and Collantes, 1996

^{i c g}

• Hydraena densa Fauvel, 1883

^{i c g}

• Hydraena dentipalpis Reitter, 1888

^{i c g}

• Hydraena dentipes Germar, 1824

^{i c g}

• Hydraena devillei Ganglbauer, 1901

^{i c g}

• Hydraena devincta Orchymont, 1940

^{i c g}

• Hydraena diadema Perkins, 2011

^{i c g}

• Hydraena diazi Trizzino, Jäch and Ribera in Trizzino, Jäch, Audisio and Rivera, 2011

^{i c g}

• Hydraena diffusa Perkins, 2011

^{i c g}

• Hydraena dilutipes Fairmaire, 1898

^{i c g}

• Hydraena dimorpha Orchymont, 1922

^{i c g}

• Hydraena dinosaurophila Jäch, 1994

^{i c g}

• Hydraena discicollis Fairmaire, 1898

^{i c g}

• Hydraena discreta Ganglbauer, 1904

^{i c g}

• Hydraena disparamera Perkins, 2007

^{i c g}

• Hydraena dochula Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena dolichogaster Janssens, 1965

^{i c g}

• Hydraena dorrigoensis Perkins, 2007

^{i c g}

• Hydraena draconisaurati Jäch and Díaz, 2005

^{i c g}

• Hydraena dudgeoni Perkins, 2011

^{i c g}

• Hydraena duodecimata Perkins, 2014

^{i c g}

• Hydraena duohamata Perkins, 2011

^{i c g}

• Hydraena ebriimadli Jäch, 1988

^{i c g}

• Hydraena ecuadormica Perkins, 2011

^{i c g}

• Hydraena egoni Jäch, 1986

^{i c g}

• Hydraena eichleri Orchymont, 1937

^{i c g}

• Hydraena einsteini Perkins, 2011

^{i c g}

• Hydraena elephanta Perkins, 2014

^{i c g}

• Hydraena elisabethae Jäch, 1992

^{i c g}

• Hydraena eliya Jäch, 1982

^{i c g}

• Hydraena emarginata Rey, 1885

^{i c g}

• Hydraena emineae Jäch and Kasapoglu, 2006

^{i c g}

• Hydraena epeirosi Ferro, 1985

^{i c g}

• Hydraena errina Orchymont, 1948

^{i c g}

• Hydraena erythraea Régimbart, 1905

^{i c g}

• Hydraena eryx Orchymont, 1948

^{i c g}

• Hydraena esquinita Brojer and Jäch, 2011

^{i c g}

• Hydraena essentia Perkins, 2011

^{i c g}

• Hydraena eucnemis Janssens, 1970

^{i c g}

• Hydraena evanescens Rey, 1884

^{i c g}

• Hydraena evansi Balfour-Browne, 1945

^{i c g}

• Hydraena exarata Kiesenwetter, 1866

^{i c g}

• Hydraena exasperata Orchymont, 1935

^{i c g}

• Hydraena excisa Kiesenwetter, 1849

^{i c g}

• Hydraena exhalista Perkins, 2011

^{i c g}

• Hydraena exilipes Perkins, 1980

^{i c g}

• Hydraena expedita Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena explanata Pic, 1905

^{i c g}

• Hydraena extorris Zwick, 1977

^{i c g}

• Hydraena falcata Jäch, 1992

^{i c g}

• Hydraena farsensis Skale and Jäch, 2011

^{i c g}

• Hydraena fasciata Perkins, 2011

^{i c g}

• Hydraena fascinata Perkins, 2011

^{i c g}

• Hydraena fasciola Perkins, 2011

^{i c g}

• Hydraena fasciolata Perkins, 2011

^{i c g}

• Hydraena fasciopaca Perkins, 2011

^{i c g}

• Hydraena favulosa Perkins, 2014

^{i c g}

• Hydraena fenestella Perkins, 2011

^{i c g}

• Hydraena ferethula Perkins, 2007

^{i c g}

• Hydraena feryi Skale and Jäch, 2011

^{i c g}

• Hydraena feuerborni Orchymont, 1932

^{i c g}

• Hydraena fijiensis Balfour-Browne, 1945

^{i c g}

• Hydraena filum Sahlberg, 1908

^{i c g}

• Hydraena finita Orchymont, 1943

^{i c g}

• Hydraena finki Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena finniganensis Perkins, 2007

^{i c g}

• Hydraena fiorii Porta, 1899

^{i c g}

• Hydraena fischeri Schönmann, 1991

^{i c g}

• Hydraena flagella Perkins, 2011

^{i c g}

• Hydraena fluvicola (Perkins, 1980)

^{i c g}

• Hydraena foliobba Perkins, 2011

^{i c g}

• Hydraena fontana Orchymont, 1932

^{i c g}

• Hydraena fontiscarsavii (Jäch, 1988)

^{i c g}

• Hydraena formosapala Perkins, 2011

^{i c g}

• Hydraena formula Orchymont, 1932

^{i c g}

• Hydraena forticollis Perkins, 2007

^{i c g}

• Hydraena fosterorum Trizzino, Jäch and Ribera in Trizzino, Jäch, Audisio and Rivera, 2011

^{i c g}

• Hydraena franklyni Deler-Hernández and Delgado, 2012

^{i c g}

• Hydraena freitagi Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena frenzeli Skale and Jäch, 2008

^{i c g}

• Hydraena fritzi Jäch, 1992

^{i c g}

• Hydraena frondsicola (Perkins, 1980)

^{i c g}

• Hydraena funda Perkins, 2011

^{i c g}

• Hydraena fundacta Perkins, 2011

^{i c g}

• Hydraena fundaequalis Perkins, 2007

^{i c g}

• Hydraena fundapta Perkins, 2011

^{i c g}

• Hydraena fundarca Perkins, 2011

^{i c g}

• Hydraena fundata Perkins, 2007

^{i c g}

• Hydraena fundextra Perkins, 2011

^{i c g}

• Hydraena furthi Jäch, 1982

^{i c g}

• Hydraena gaditana Lagar and Fresneda, 1990

^{i c g}

• Hydraena galatica Janssens, 1970

^{i c g}

• Hydraena galea Perkins, 2011

^{i c g}

• Hydraena gavarrensis Jäch, Díaz and Martinoy, 2005

^{i c g}

• Hydraena geminya Perkins, 1980

^{i c g}

• Hydraena genumorpha Perkins, 2014

^{i c g}

• Hydraena georgiadesi Orchymont, 1931

^{i c g}

• Hydraena geraldneuhauseri Jäch and Díaz, 2006

^{i c g}

• Hydraena germaini Orchymont, 1923

^{i c g}

• Hydraena glassmani Jäch, 1986

^{i c g}

• Hydraena gnatella Orchymont, 1945

^{i c g}

• Hydraena gnatelloides Orchymont, 1945

^{i c g}

• Hydraena gracilidelphis Trizzino, Valladares, Garrido and Audisio, 2012

^{i c g}

• Hydraena gracilis Germar, 1824

^{i c g}

• Hydraena graciloides (Jäch, 1988)

^{i c g}

• Hydraena grandis Reitter, 1885

^{i c g}

• Hydraena graphica Orchymont, 1931

^{i c g}

• Hydraena grata Orchymont, 1944

^{i c g}

• Hydraena gregalis Orchymont, 1944

^{i c g}

• Hydraena gressa Orchymont, 1944

^{i c g}

• Hydraena griphus Orchymont, 1944

^{i c g}

• Hydraena grouvellei Orchymont, 1923

^{i c g}

• Hydraena grueberi Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena guadelupensis Orchymont, 1923

^{i c g}

• Hydraena guangxiensis Jäch and Díaz, 2005

^{i c g}

• Hydraena guatemala Perkins, 1980

^{i c g}

• Hydraena guentheri Jäch, 1992

^{i c g}

• Hydraena guilin Jäch and Díaz, 2005

^{i c g}

• Hydraena gynaephila Jäch, 1997

^{i c g}

• Hydraena habitiva Perkins, 2014

^{i c g}

• Hydraena hainzi Jäch, 1988

^{i c g}

• Hydraena haitensis Perkins, 1980

^{i c g}

• Hydraena hajeki Skale and Jäch, 2011

^{i c g}

• Hydraena hamifera Zwick, 1977

^{i c g}

• Hydraena hansreuteri Jäch and Díaz, 2005

^{i c g}

• Hydraena hayashii Jäch and Díaz, 2012

^{i c g}

• Hydraena helena Orchymont, 1929

^{i c g}

• Hydraena hendrichi Jäch, Díaz and Skale, 2013

^{i c g}

• Hydraena hernandoi Fresneda and Lagar, 1990

^{i c g}

• Hydraena herzogestella Perkins, 2011

^{i c g}

• Hydraena heterogyna Bedel, 1898

^{i c g}

• Hydraena hiekei Jäch, 1992

^{i c g}

• Hydraena hillaryi Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena hintoni Perkins, 2011

^{i c g}

• Hydraena hispanica Ganglbauer, 1901

^{i c g}

• Hydraena holdhausi Pretner, 1929

^{i c g}

• Hydraena hornabrooki Perkins, 2011

^{i c g}

• Hydraena hortensis Jäch and Díaz, 2000

^{i c g}

• Hydraena hosiwergi Freitag and Jäch, 2007

^{i c g}

• Hydraena hosseinieorum Bilton and Jäch, 1998

^{i c g}

• Hydraena huangshanensis Jäch and Díaz, 2005

^{i c g}

• Hydraena huitongensis Jäch and Díaz, 2005

^{i c g}

• Hydraena humanica Perkins, 2014

^{i c g}

• Hydraena hunanensis Pu, 1951

^{i c g}

• Hydraena hungarica Rey, 1884

^{i c g}

• Hydraena huonica Perkins, 2011

^{i c g}

• Hydraena hyalina Perkins, 1980

^{i c g}

• Hydraena hynesi Zwick, 1977

^{i c g}

• Hydraena hypipamee Perkins, 2007

^{i c g}

• Hydraena ibalimi Perkins, 2011

^{i c g}

• Hydraena iberica Orchymont, 1936

^{i c g}

• Hydraena idema Perkins, 2011

^{i c g}

• Hydraena iheya Jäch and Díaz, 1999

^{i c g}

• Hydraena ilamensis Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena ilica Jäch, 1994

^{i c g}

• Hydraena imbria Jäch and Díaz, 2001

^{i c g}

• Hydraena impala Perkins, 2011

^{i c g}

• Hydraena imperatrix Kniz, 1919

^{i c g}

• Hydraena impercepta Zwick, 1977

^{i c g}

• Hydraena impressicollis Fairmaire, 1898

^{i c g}

• Hydraena inancala Perkins, 2007

^{i c g}

• Hydraena inapicipalpis Pic, 1918

^{i c g}

• Hydraena incisiva Perkins, 2011

^{i c g}

• Hydraena incista Perkins, 2011

^{i c g}

• Hydraena incurva Orchymont, 1932

^{i c g}

• Hydraena indiana Jäch, 1994

^{i c g}

• Hydraena indica Orchymont, 1920

^{i c g}

• Hydraena infoveola Perkins, 2011

^{i c g}

• Hydraena ingens (Perkins, 1980)

^{i c g}

• Hydraena inhalista Perkins, 2011

^{i c g}

• Hydraena injectiva Perkins, 2014

^{i c g}

• Hydraena innuda Perkins, 2007

^{i c g}

• Hydraena inopinata Jäch and Díaz, 1998

^{i c g}

• Hydraena inplacopaca Perkins, 2011

^{i c g}

• Hydraena insandalia Perkins, 2011

^{i c g}

• Hydraena insita Orchymont, 1932

^{i c g}

• Hydraena insolita Orchymont, 1932

^{i c g}

• Hydraena insularis Orchymont, 1945

^{i c g}

• Hydraena integra Pretner, 1931

^{i c g}

• Hydraena intensa Perkins, 2011

^{i c g}

• Hydraena intermedia Rosenhauer, 1847

^{i c g}

• Hydraena intraangulata Perkins, 2007

^{i c g}

• Hydraena inusta Orchymont, 1932

^{i c g}

• Hydraena invicta Perkins, 2007

^{i c g}

• Hydraena iriomotensis Jäch and Díaz, 1999

^{i c g}

• Hydraena isabelae Castro and Herrera, 2001

^{i c g}

• Hydraena isolinae Jäch and Díaz, 1998

^{i c g}

• Hydraena ispirensis Kasapoglu, Jäch and Skale, 2010

^{i c g}

• Hydraena iterata Orchymont, 1948

^{i c g}

• Hydraena jacobsoni Orchymont, 1932

^{i c g}

• Hydraena jaechiana (Audisio and De Biase, 1990)

^{i c g}

• Hydraena jaegeri Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena jailensis Breit, 1917

^{i c g}

• Hydraena janczyki Jäch, 1992

^{i c g}

• Hydraena janeceki Jäch, 1987

^{i c g}

• Hydraena janssensi Nilsson, 2001

^{i c g}

• Hydraena jengi Jäch and Díaz, 1998

^{i c g}

• Hydraena jilanzhui Jäch and Díaz, 2005

^{i c g}

• Hydraena jivaro Perkins, 1980

^{i c g}

• Hydraena johncoltranei Perkins, 2011

^{i c g}

• Hydraena jubilata Perkins, 2011

^{i c g}

• Hydraena kadowakii Jäch and Díaz, 2012

^{i c g}

• Hydraena kakadu Perkins, 2007

^{i c g}

• Hydraena kamitei Jäch and Díaz, 2012

^{i c g}

• Hydraena karinkukolae Jäch, 1989

^{i c g}

• Hydraena karmai Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena kasyi Jäch, 1992

^{i c g}

• Hydraena kaufmanni Ganglbauer, 1901

^{i c g}

• Hydraena kellymilleri Perkins, 2011

^{i c g}

• Hydraena khnzoriani Janssens, 1968

^{i c g}

• Hydraena kilimandjarensis Régimbart, 1906

^{i c g}

• Hydraena kitayamai Jäch and Díaz, 2012

^{i c g}

• Hydraena knischi Orchymont, 1928

^{i c g}

• Hydraena kocheri Berthélemy, 1992

^{i c g}

• Hydraena kodadai Freitag and Jäch, 2007

^{i c g}

• Hydraena koje Perkins, 2011

^{i c g}

• Hydraena koma Perkins, 2011

^{i c g}

• Hydraena krasnodarensis Jäch and Díaz, 2006

^{i c g}

• Hydraena kroumiriana Kaddouri, 1992

^{i c g}

• Hydraena kucinici Micetic Stankovic and Jäch, 2012

^{i c g}

• Hydraena kuehnelti Jäch, 1989

^{i c g}

• Hydraena kurdistanica Jäch, 1988

^{i c g}

• Hydraena kwangsiensis Pu, 1951

^{i c g}

• Hydraena labropaca Perkins, 2011

^{i c g}

• Hydraena lagamba Brojer and Jäch, 2011

^{i c g}

• Hydraena lapidicola Kiesenwetter, 1849

^{i c g}

• Hydraena lapissectilis Jäch, 1992

^{i c g}

• Hydraena larissae Jäch and Díaz, 2000

^{i c g}

• Hydraena larsoni Perkins, 2007

^{i c g}

• Hydraena lascrucensis Brojer and Jäch, 2011

^{i c g}

• Hydraena lassulipes Perkins, 2011

^{i c g}

• Hydraena latebricola Jäch, 1986

^{i c g}

• Hydraena latisoror Perkins, 2007

^{i c g}

• Hydraena lazica Janssens, 1963

^{i c g}

• Hydraena leechi Perkins, 1980

^{i c g}

• Hydraena leei Jäch and Díaz, 1998

^{i c g}

• Hydraena legorskyi Jäch and Brojer, 2012

^{i c g}

• Hydraena lehmanni Jäch and Díaz, 2005

^{i c g}

• Hydraena leonhardi Breit, 1916

^{i c g}

• Hydraena leprieuri Sainte-Claire Deville, 1905

^{i c g}

• Hydraena levantina Sahlberg, 1908

^{i c g}

• Hydraena ligulipes Jäch, 1988

^{i c g}

• Hydraena lilianae Perkins, 2011

^{i c g}

• Hydraena limbobesa Perkins, 2011

^{i c g}

• Hydraena limpidicollis Perkins, 1980

^{i c g}

• Hydraena liriope Orchymont, 1943

^{i c g}

• Hydraena longicollis Sharp, 1882

^{i c g}

• Hydraena loripes Perkins, 2011

^{i c g}

• Hydraena lotti Bilton, 2013

^{i c g}

• Hydraena lucasi Lagar, 1984

^{i c g}

• Hydraena lucernae Zwick, 1977

^{i c g}

• Hydraena ludovicae Orchymont, 1931

^{i c g}

• Hydraena luminicollis Perkins, 2007

^{i c g}

• Hydraena luridipennis MacLeay, 1873

^{i c g}

• Hydraena lusitana (Berthélemy in Berthélemy and Whytton Da Terra, 1977)

^{i c g}

• Hydraena lycia Jäch, 1988

^{i c g}

• Hydraena macedonica Orchymont, 1931

^{i c g}

• Hydraena maculicollis Champion, 1920

^{i c g}

• Hydraena maculopala Perkins, 2011

^{i c g}

• Hydraena madronensis Castor, García and Ferreras, 2000

^{i c g}

• Hydraena magna Pu, 1951

^{i c g}

• Hydraena magnessa Jäch, 1997

^{i c g}

• Hydraena magnetica Zwick, 1977

^{i c g}

• Hydraena mahensis Scott, 1913

^{i c g}

• Hydraena malagricola Jäch and Díaz, 2012

^{i c g}

• Hydraena malickyi Jäch, 1989

^{i c g}

• Hydraena malkini Perkins, 1980

^{i c g}

• Hydraena manabica Perkins, 2011

^{i c g}

• Hydraena manaslu Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena manfredjaechi Delgado and Soler, 1991

^{i c g}

• Hydraena manguao Freitag and Jäch, 2007

^{i c g}

• Hydraena manulea Perkins, 2011

^{i c g}

• Hydraena manuloides Perkins, 2011

^{i c g}

• Hydraena marawaka Perkins, 2011

^{i c g}

• Hydraena marcosae Aguilera, Hernando and Ribera, 1997

^{i c g}

• Hydraena marginicollis Kiesenwetter, 1849

^{i c g}

• Hydraena mariannae Jäch, 1992

^{i c g}

• Hydraena marinae Castro, 2003

^{i c g}

• Hydraena martensi Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena martinschoepfi Jäch and Díaz, 2005

^{i c g}

• Hydraena masatakai Jäch and Díaz, 2003

^{i c g}

• Hydraena maureenae Perkins, 1980

^{i c g}

• Hydraena mauriciogarciai Perkins, 2011

^{i c g}

• Hydraena mazamitla Perkins, 1980

^{i c g}

• Hydraena mecai Millán and Aguilera, 2000

^{i c g}

• Hydraena melas Dalla Torre, 1877

^{i c g}

• Hydraena mercuriala Perkins, 2011

^{i c g}

• Hydraena meschniggi Pretner, 1929

^{i c g}

• Hydraena metzeni Perkins, 2007

^{i c g}

• Hydraena mexicana Perkins, 1980

^{i c g}

• Hydraena mianminica Perkins, 2011

^{i c g}

• Hydraena michaelbalkei Jäch, Díaz and Skale, 2013

^{i c g}

• Hydraena mignymixys Perkins, 1980

^{i c g}

• Hydraena millerorum Perkins, 2007

^{i c g}

• Hydraena miniretia Perkins, 2007

^{i c g}

• Hydraena mintrita Perkins, 2011

^{i c g}

• Hydraena mitchellensis Perkins, 2007

^{i c g}

• Hydraena miyatakei Satô, 1959

^{i c g}

• Hydraena modili Jäch, 1988

^{i c g}

• Hydraena monikae Jäch and Díaz, 2000

^{i c g}

• Hydraena monscassius Jäch, 1988

^{i c g}

• Hydraena monstruosipes Ferro, 1986

^{i c g}

• Hydraena monteithi Perkins, 2007

^{i c g}

• Hydraena morio Kiesenwetter, 1849

^{i c g}

• Hydraena motzfeldi Skale and Jäch, 2011

^{i c g}

• Hydraena mouzaiensis Sainte-Claire Deville, 1909

^{i c g}

• Hydraena mpumalanga Perkins, 2014

^{i c g}

• Hydraena muelleri Pretner, 1931

^{i c g}

• Hydraena muezziginea Jäch, 1988

^{i c g}

• Hydraena multiloba Perkins, 2011

^{i c g}

• Hydraena multimurata Perkins, 2014

^{i c g}

• Hydraena multispina Perkins, 2011

^{i c g}

• Hydraena mylasae Jäch, 1992

^{i c g}

• Hydraena namibiensis Perkins, 2014

^{i c g}

• Hydraena nanocolorata Perkins, 2011

^{i c g}

• Hydraena nanopala Perkins, 2011

^{i c g}

• Hydraena nanoscintilla Perkins, 2011

^{i c g}

• Hydraena natiforma Perkins, 2014

^{i c g}

• Hydraena neblina Perkins, 2011

^{i c g}

• Hydraena nelsonmandelai Makhan, 2008

^{i c g}

• Hydraena neoaccurata Perkins, 2014

^{i c g}

• Hydraena nevermanni Perkins, 1980

^{i c g}

• Hydraena newtoni Perkins, 1980

^{i c g}

• Hydraena nielshaggei Freitag and Jäch, 2007

^{i c g}

• Hydraena nigra Hatch, 1965

^{i c g}

• Hydraena nigrita Germar, 1824

^{i c g}

• Hydraena nike Jäch, 1995

^{i c g}

• Hydraena nilguenae (Jäch, 1988)

^{i c g}

• Hydraena nitidimenta Perkins, 2011

^{i c g}

• Hydraena nivalis Jäch, 1992

^{i c g}

• Hydraena nomenipes Perkins, 2014

^{i c g}

• Hydraena notsui Satô, 1978

^{i c g}

• Hydraena novacula Perkins, 2011

^{i c g}

• Hydraena numidica Sainte-Claire Deville, 1905

^{i c g}

• Hydraena nurabadensis Skale and Jäch, 2011

^{i c g}

• Hydraena nuratauensis Jäch, 1994

^{i c g}

• Hydraena oaxaca Perkins, 1980

^{i c g}

• Hydraena oblio Perkins, 1980

^{i c g}

• Hydraena occidentalis Perkins, 1980

^{i c g}

• Hydraena occitana (Audisio and De Biase, 1995)

^{i c g}

• Hydraena okapa Perkins, 2011

^{i c g}

• Hydraena okinawensis Jäch and Díaz, 1999

^{i c g}

• Hydraena olidipastoris Jäch, 1988

^{i c g}

• Hydraena ollopa Perkins, 2011

^{i c g}

• Hydraena optica Jäch and Díaz, 2012

^{i c g}

• Hydraena orchis Jäch and Díaz, 1998

^{i c g}

• Hydraena orcula Perkins, 1980

^{i c g}

• Hydraena ordishi Delgado and Palma, 1997

^{i c g}

• Hydraena orientalis Breit, 1916

^{i c g}

• Hydraena ortali Jäch, 1986

^{i c g}

• Hydraena orthosia Jäch, Díaz and Dia in Jäch, Dia and Díaz, 2006

^{i c g}

• Hydraena otiarca Perkins, 2011

^{i c g}

• Hydraena ovata Janssens, 1961

^{i c g}

• Hydraena owenobesa Perkins, 2011

^{i c g}

• Hydraena oxiana Janssens, 1974

^{i c g}

• Hydraena ozarkensis Perkins, 1980

^{i c g}

• Hydraena pachyptera Apfelbeck, 1909

^{i c g}

• Hydraena pacifica Perkins, 1980

^{i c g}

• Hydraena pacificica Perkins, 2011

^{i c g}

• Hydraena paeminosa Perkins, 1980

^{i c g}

• Hydraena pagaluensis Hernando and Ribera, 2001

^{i c g}

• Hydraena paganettii Ganglbauer, 1901

^{i c g}

• Hydraena pajarita Brojer and Jäch, 2011

^{i c g}

• Hydraena pakistanica Jäch, 1992

^{i c g}

• Hydraena pala Perkins, 2011

^{i c g}

• Hydraena palamita Perkins, 2011

^{i c g}

• Hydraena palawanensis Freitag and Jäch, 2007

^{i c g}

• Hydraena pallidula Sainte-Claire Deville, 1909

^{i c g}

• Hydraena palustris Erichson, 1837

^{i c g}

• Hydraena pamirica Jäch, 1992

^{i c g}

• Hydraena pamphylia Jäch and Díaz, 2001

^{i c g}

• Hydraena pangaei Jäch, 1992

^{i c g}

• Hydraena pantanalensis Perkins, 2011

^{i c g}

• Hydraena paraguayensis Janssens, 1972

^{i c g}

• Hydraena parciplumea Perkins, 2007

^{i c g}

• Hydraena particeps Perkins, 1980

^{i c g}

• Hydraena parva Zwick, 1977

^{i c g}

• Hydraena parysatis Janssens, 1981

^{i c g}

• Hydraena paucistriata Jäch and Díaz, 2000

^{i c g}

• Hydraena paulmoritz Jäch, Díaz and Skale, 2013

^{i c g}

• Hydraena pavicula Perkins, 1980

^{i c g}

• Hydraena paxillipes Perkins, 2011

^{i c g}

• Hydraena peckorum Perkins, 2011

^{i c g}

• Hydraena pectenata Perkins, 2011

^{i c g}

• Hydraena pedroaguilerai Perkins, 2011

^{i c g}

• Hydraena pegopyga Perkins, 2011

^{i c g}

• Hydraena pelops Jäch, 1995

^{i c g}

• Hydraena pennsylvanica Kiesenwetter, 1849

^b

• Hydraena pensylvanica Kiesenwetter, 1849

^{i c g}

• Hydraena penultimata Perkins, 2011

^{i c g}

• Hydraena perkinsi Spangler, 1980

^{i c g}

• Hydraena perlonga Balfour-Browne, 1950

^{i c g}

• Hydraena perpunctata Perkins, 2011

^{i c g}

• Hydraena persica Janssens, 1981

^{i c g}

• Hydraena pertransversa Perkins, 2011

^{i c g}

• Hydraena peru Perkins, 1980

^{i c g}

• Hydraena pesici Skale and Jäch, 2011

^{i c g}

• Hydraena petila Perkins, 1980

^{i c g}

• Hydraena phainops Perkins, 2011

^{i c g}

• Hydraena phallerata Orchymont, 1944

^{i c g}

• Hydraena phallica Orchymont, 1930

^{i c g}

• Hydraena phassilyi Orchymont, 1931

^{i c g}

• Hydraena philippi Jäch and Díaz, 2005

^{i c g}

• Hydraena philyra Orchymont, 1944

^{i c g}

• Hydraena phoenicia Jäch, Díaz and Dia in Jäch, Dia and Díaz, 2006

^{i c g}

• Hydraena photogenica Perkins, 2011

^{i c g}

• Hydraena pici Sainte-Claire Deville, 1905

^{i c g}

• Hydraena picula Perkins, 2011

^{i c g}

• Hydraena pilimera Brojer and Jäch, 2011

^{i c g}

• Hydraena pilipes Zwick, 1977

^{i c g}

• Hydraena pilulambra Perkins, 2011

^{i c g}

• Hydraena pindica Janssens, 1965

^{i c g}

• Hydraena pisciforma Perkins, 2014

^{i c g}

• Hydraena planata Kiesenwetter, 1849

^{i c g}

• Hydraena plastica Orchymont, 1943

^{i c g}

• Hydraena platycnemis Jäch, 1988

^{i c g}

• Hydraena platynaspis Jäch, 1988

^{i c g}

• Hydraena platysoma Janssens, 1968

^{i c g}

• Hydraena plaumanni Orchymont, 1937

^{i c g}

• Hydraena plumipes Rey, 1886

^{i c g}

• Hydraena pluralticola Perkins, 2011

^{i c g}

• Hydraena plurifurcata Jäch and Díaz, 1998

^{i c g}

• Hydraena polita Kiesenwetter, 1849

^{i c g}

• Hydraena pontequula Perkins, 1980

^{i c g}

• Hydraena pontica Janssens, 1963

^{i c g}

• Hydraena porchi Perkins, 2007

^{i c g}

• Hydraena porcula Jäch and Díaz, 1998

^{i c g}

• Hydraena praetermissa Jäch, 1987

^{i c g}

• Hydraena premordica Perkins, 1980

^{i c g}

• Hydraena pretneri Chiesa, 1927

^{i c g}

• Hydraena prieto Perkins, 1980

^{i c g}

• Hydraena princeps Fauvel, 1903

^{i c g}

• Hydraena processa Perkins, 2011

^{i c g}

• Hydraena producta Mulsant and Rey, 1852

^{i c g}

• Hydraena proesei Skale and Jäch, 2011

^{i c g}

• Hydraena profunda Perkins, 2014

^{i c g}

• Hydraena prokini Jäch and Díaz, 2006

^{i c g}

• Hydraena propria Perkins, 2011

^{i c g}

• Hydraena prusensis Jäch, 1992

^{i c g}

• Hydraena pseudocirrata Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena pseudopalawanensis Freitag and Jäch, 2007

^{i c g}

• Hydraena pseudoriparia Orchymont, 1945

^{i c g}

• Hydraena puetzi Jäch, 1994

^{i c g}

• Hydraena pugillista Perkins, 2007

^{i c g}

• Hydraena pulchella Germar, 1824

^{i c g}

• Hydraena pulsatrix Perkins, 1980

^{i c g}

• Hydraena punctata LeConte, 1855

^{i c g}

• Hydraena puncticollis Sharp, 1882

^{i c g}

• Hydraena punctilata Perkins, 2011

^{i c g}

• Hydraena putearius Jäch and Díaz, 2000

^{i c g}

• Hydraena pygmaea Waterhouse, 1833

^{i c g}

• Hydraena quadrata (Janssens, 1980)

^{i c g}

• Hydraena quadricollis Wollaston, 1864

^{i c g}

• Hydraena quadricurvipes Perkins, 1980

^{i c g}

• Hydraena quadriplumipes Perkins, 2011

^{i c g}

• Hydraena quechua Perkins, 1980

^{i c g}

• Hydraena queenslandica Perkins, 2007

^{i c g}

• Hydraena quetiae Castro, 2000

^{i c g}

• Hydraena quilisi Lagar, Fresneda and Fernando, 1987

^{i c g}

• Hydraena quintana Perkins, 2011

^{i c g}

• Hydraena ramuensis Perkins, 2011

^{i c g}

• Hydraena ramuquintana Perez, 2011

^{i c g}

• Hydraena receptiva Perkins, 2011

^{i c g}

• Hydraena reflectiva Perkins, 2014

^{i c g}

• Hydraena regimbarti Zaitzev, 1908

^{i c g}

• Hydraena remulipes Perkins, 2011

^{i c g}

• Hydraena reticulata Zwick, 1977

^{i c g}

• Hydraena reticuloides Perkins, 2007

^{i c g}

• Hydraena reticulositis Perkins, 2007

^{i c g}

• Hydraena revelovela Perkins, 2007

^{i c g}

• Hydraena reverberata Perkins, 2011

^{i c g}

• Hydraena reyi Kuwert, 1888

^{i c g}

• Hydraena rhinoceros (Janssens, 1972)

^{i c g}

• Hydraena rhodia Jäch, 1985

^{i c g}

• Hydraena riberai Jäch, Aguilera and Hernando, 1998

^{i c g}

• Hydraena richardimbi Jäch, 1992

^{i c g}

• Hydraena rigua Orchymont, 1931

^{i c g}

• Hydraena ripaeaureae (Janssens, 1972)

^{i c g}

• Hydraena riparia Kugelann, 1794

^{i c g}

• Hydraena rivularis Guillebeau, 1896

^{i c g}

• Hydraena robusta Zwick, 1977

^{i c g}

• Hydraena rosannae Audisio, Trizzino and De Biase in Audisio, Trizzino, De Biase, Mancini and Antonini, 2009

^{i c g}

• Hydraena rudallensis Blackburn, 1896

^{i c g}

• Hydraena rufipennis Boscá Berga, 1932

^{i c g}

• Hydraena rufipes Curtis, 1830

^{i c g}

• Hydraena rugosa Mulsant, 1844

^{i c g}

• Hydraena ruinosa Zwick, 1977

^{i c g}

• Hydraena rukiyeae Kasapoglu, Jäch and Skale, 2010

^{i c g}

• Hydraena sabella Perkins, 1980

^{i c g}

• Hydraena saga Orchymont, 1930

^{i c g}

• Hydraena sagatai Perkins, 2011

^{i c g}

• Hydraena sahlbergi Orchymont, 1923

^{i c g}

• Hydraena saluta Perkins, 2011

^{i c g}

• Hydraena samia Jäch, 1986

^{i c g}

• Hydraena samnitica Knisch, 1924

^{i c g}

• Hydraena sanagergelyae Brojer and Jäch, 2011

^{i c g}

• Hydraena sanfilippoi (Audisio and De Biase, 1995)

^{i c g}

• Hydraena sappho Janssens, 1965

^{i c g}

• Hydraena sardoa Binaghi, 1961

^{i c g}

• Hydraena satoi Jäch and Díaz, 1999

^{i c g}

• Hydraena sautakei Jäch and Díaz, 1999

^{i c g}

• Hydraena sauteri Orchymont, 1913

^{i c g}

• Hydraena scabra Orchymont, 1925

^{i c g}

• Hydraena scabrosa Orchymont, 1931

^{i c g}

• Hydraena schawalleri Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena schilfii Jäch, 1988

^{i c g}

• Hydraena schillhammeri Jäch, 1988

^{i c g}

• Hydraena schmidi Jäch and Díaz, 2001

^{i c g}

• Hydraena schoedli Jäch, 1992

^{i c g}

• Hydraena schoenmanni Jäch, 1988

^{i c g}

• Hydraena schubertorum Jäch and Díaz, 2001

^{i c g}

• Hydraena schuelkei Jäch, 1992

^{i c g}

• Hydraena schuleri Ganglbauer, 1901

^{i c g}

• Hydraena scintilla Perkins, 1980

^{i c g}

• Hydraena scintillabella Perkins, 1980

^{i c g}

• Hydraena scintillamima Perkins, 2011

^{i c g}

• Hydraena scintillapicta Perkins, 2011

^{i c g}

• Hydraena scintillarca Perkins, 2011

^{i c g}

• Hydraena scintillutea Perkins, 1980

^{i c g}

• Hydraena scitula Orchymont, 1943

^{i c g}

• Hydraena scolops Perkins, 1980

^{i c g}

• Hydraena scopula Perkins, 1980

^{i c g}

• Hydraena scythica Janssens, 1974

^{i c g}

• Hydraena sebastiani Perkins, 2014

^{i c g}

• Hydraena sepikramuensis Perkins, 2011

^{i c g}

• Hydraena septemlacuum Jäch, 1992

^{i c g}

• Hydraena serpentina Jäch, 1988

^{i c g}

• Hydraena serricollis Wollaston, 1864

^{i c g}

• Hydraena servilia Orchymont, 1936

^{i c g}

• Hydraena sexarcuata Perkins, 2011

^{i c g}

• Hydraena sexsuprema Perkins, 2011

^{i c g}

• Hydraena sharmai Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena sharpi Rey, 1886

^{i c g}

• Hydraena shorti Perkins, 2011

^{i c g}

• Hydraena sicula Kiesenwetter, 1849

^{i c g}

• Hydraena sidon Jäch, Díaz and Dia in Jäch, Dia and Díaz, 2006

^{i c g}

• Hydraena sierra Perkins, 1980

^{i c g}

• Hydraena similis Orchymont, 1930

^{i c g}

• Hydraena simonidea Orchymont, 1931

^{i c g}

• Hydraena simplicicollis Blackburn, 1896

^{i c g}

• Hydraena simplipes Zwick, 1977

^{i c g}

• Hydraena singaporensis Jäch, Díaz and Skale, 2013

^{i c g}

• Hydraena sinope Jäch, 1992

^{i c g}

• Hydraena smyrnensis Sahlberg, 1908

^{i c g}

• Hydraena socius Jäch and Díaz, 1999

^{i c g}

• Hydraena solarii Pretner, 1930

^{i c g}

• Hydraena solodovnikovi Jäch and Díaz, 2006

^{i c g}

• Hydraena sordida Sharp, 1882

^{i c g}

• Hydraena spangleri Perkins, 1980

^{i c g}

• Hydraena spatula Perkins, 2011

^{i c g}

• Hydraena speciosa Orchymont, 1944

^{i c g}

• Hydraena spinipes Baudi, 1882

^{i c g}

• Hydraena spinissima Perkins, 2007

^{i c g}

• Hydraena spinobesa Perkins, 2011

^{i c g}

• Hydraena splecoma Perkins, 1980

^{i c g}

• Hydraena squalida Orchymont, 1932

^{i c g}

• Hydraena stefani Jäch and Díaz, 2005

^{i c g}

• Hydraena steineri Perkins, 2011

^{i c g}

• Hydraena stellula Perkins, 2011

^{i c g}

• Hydraena storeyi Perkins, 2007

^{i c g}

• Hydraena striolata Perkins, 2011

^{i c g}

• Hydraena stussineri Kuwert, 1888

^{i c g}

• Hydraena subacuminata Rey, 1884

^{i c g}

• Hydraena subgrandis Jäch, 1988

^{i c g}

• Hydraena subimpressa Rey, 1885

^{i c g}

• Hydraena subina Orchymont, 1944

^{i c g}

• Hydraena subinflata Orchymont, 1944

^{i c g}

• Hydraena subinoides Orchymont, 1944

^{i c g}

• Hydraena subintegra Ganglbauer, 1901

^{i c g}

• Hydraena subinura Orchymont, 1944

^{i c g}

• Hydraena subirregularis Pic, 1918

^{i c g}

• Hydraena subjuncta Orchymont, 1930

^{i c g}

• Hydraena sublamina Orchymont, 1945

^{i c g}

• Hydraena sublapsa Orchymont, 1945

^{i c g}

• Hydraena subsequens Rey, 1886

^{i c g}

• Hydraena supersexa Perkins, 2011

^{i c g}

• Hydraena supina Perkins, 2011

^{i c g}

• Hydraena szechuanensis Pu, 1951

^{i c g}

• Hydraena takin Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena takutu Perkins, 2011

^{i c g}

• Hydraena tarsotricha Perkins, 2011

^{i c g}

• Hydraena tarvisina (Ferro, 1992)

^{i c g}

• Hydraena tatii Sáinz-Cantero and Alba-Tercedor, 1989

^{i c g}

• Hydraena tauricola Jäch, 1988

^{i c g}

• Hydraena taxila Janssens, 1962

^{i c g}

• Hydraena tekmanensis Jäch, Skale and Kasapoglu, 2011

^{i c g}

• Hydraena tenjikuana Satô, 1979

^{i c g}

• Hydraena tenuis (Janssens, 1980)

^{i c g}

• Hydraena tenuisella Perkins, 2007

^{i c g}

• Hydraena tenuisoror Perkins, 2007

^{i c g}

• Hydraena terebrans Jäch, 1992

^{i c g}

• Hydraena terralta Perkins, 1980

^{i c g}

• Hydraena testacea Curtis, 1830

^{i c g}

• Hydraena tetana Perkins, 2011

^{i c g}

• Hydraena textila Perkins, 2007

^{i c g}

• Hydraena thienemanni Orchymont, 1932

^{i c g}

• Hydraena thola Perkins, 2011

^{i c g}

• Hydraena tholasoris Perkins, 2011

^{i c g}

• Hydraena thumbelina Perkins, 2011

^{i c g}

• Hydraena thumbelipes Perkins, 2011

^{i c g}

• Hydraena thyene Balfour-Browne, 1958

^{i c g}

• Hydraena tiara Perkins, 2014

^{i c g}

• Hydraena tibiopaca Perkins, 2011

^{i c g}

• Hydraena tobogan Perkins, 2011

^{i c g}

• Hydraena torosopala Perkins, 2011

^{i c g}

• Hydraena torricellica Perkins, 2011

^{i c g}

• Hydraena transvallis Perkins, 2011

^{i c g}

• Hydraena trapezoidalis Zwick, 1977

^{i c g}

• Hydraena tricantha Zwick, 1977

^{i c g}

• Hydraena trichotarsa Perkins, 2011

^{i c g}

• Hydraena tricosipes Perkins, 2011

^{i c g}

• Hydraena tridigita Perkins, 2011

^{i c g}

• Hydraena tridisca Perkins, 2007

^{i c g}

• Hydraena triloba Perkins, 2007

^{i c g}

• Hydraena trinidensis Perkins, 1980

^{i c g}

• Hydraena triparamera Jäch, 1982

^{i c g}

• Hydraena tritropis Perkins, 2011

^{i c g}

• Hydraena tritutela Perkins, 2011

^{i c g}

• Hydraena truncata Rey, 1885

^{i c g}

• Hydraena tsushimaensis Jäch and Díaz, 2012

^{i c g}

• Hydraena tubuliphallis Jäch, 1982

^{i c g}

• Hydraena tucumanica Perkins, 1980

^{i c g}

• Hydraena tuolumne Perkins, 1980

^{i c g}

• Hydraena turcica Janssens, 1965

^{i c g}

• Hydraena turrialba Perkins, 1980

^{i c g}

• Hydraena tyrrhena Binaghi, 1961

^{i c g}

• Hydraena ulna Perkins, 2011

^{i c g}

• Hydraena umbolenta Perkins, 2011

^{i c g}

• Hydraena unca Valladares, 1989

^{i c g}

• Hydraena undevigintioctogintasisyphos Jäch and Díaz, 2005

^{i c g}

• Hydraena undulata Jäch and Díaz, 1998

^{i c g}

• Hydraena uniforma Perkins, 2014

^{i c g}

• Hydraena unita Perkins, 2011

^{i c g}

• Hydraena uzbekistanica Jäch, 1994

^{i c g}

• Hydraena vadosa Perkins, 2014

^{i c g}

• Hydraena valentini Jäch and Díaz, 2012

^{i c g}

• Hydraena vandykei Orchymont, 1923

^{i c g}

• Hydraena variopaca Perkins, 2011

^{i c g}

• Hydraena vedrasi Orchymont, 1931

^{i c g}

• Hydraena vela Perkins, 1980

^{i c g}

• Hydraena velvetina Perkins, 2011

^{i c g}

• Hydraena venezuela Perkins, 2011

^{i c g}

• Hydraena verberans Jäch and Díaz, 2006

^{i c g}

• Hydraena verstraeteni Ferro, 1984

^{i c g}

• Hydraena victoriae Jäch and Díaz, 1999

^{i c g}

• Hydraena vietnamensis (Janssens, 1972)

^{i c g}

• Hydraena virginalis Janssens, 1963

^{i c g}

• Hydraena vodozi Sainte-Claire Deville, 1908

^{i c g}

• Hydraena vulgaris Jäch and Díaz, 2000

^{i c g}

• Hydraena waldheimi Jäch, 1987

^{i c g}

• Hydraena wangi Jäch and Díaz, 1998

^{i c g}

• Hydraena wangmiaoi Jäch and Díaz, 2005

^{i c g}

• Hydraena watanabei Jäch and Satô, 1988

^{i c g}

• Hydraena wattsi Perkins, 2007

^{i c g}

• Hydraena weigeli Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena weiri Perkins, 2007

^{i c g}

• Hydraena wencke Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena wewalkai Jäch, 1988

^{i c g}

• Hydraena williamsensis Deane, 1931

^{i c g}

• Hydraena wittmeri Satô, 1979

^{i c g}

• Hydraena wolfi Skale and Jäch in Jäch and Skale, 2009

^{i c g}

• Hydraena wrasei Jäch, 1992

^{i c g}

• Hydraena xingu Perkins, 2011

^{i c g}

• Hydraena yangae Jäch, Díaz and Skale, 2013

^{i c g}

• Hydraena yonaguniensis Jäch and Díaz, 2003

^{i c g}

• Hydraena yosemitensis Perkins, 1980

^{i c g}

• Hydraena yoshitomii Jäch and Díaz, 1999

^{i c g}

• Hydraena youngi Perkins, 1980

^{i c g}

• Hydraena ypsilon Zwick, 1977

^{i c g}

• Hydraena yunnanensis Pu, 1942

^{i c g}

• Hydraena zapatina Perkins, 1980

^{i c g}

• Hydraena zelandica Ordish, 1984

^{i c g}

• Hydraena zetteli Freitag and Jäch, 2007

^{i c g}

• Hydraena zezerensis Díaz Pazos and Bilton, 1995

^{i c g}

• Hydraena zimbabwensis Perkins, 2014

^{i c g}

• Hydraena zwicki Perkins, 2007

^{i c g}

Data sources: i = ITIS, c = Catalogue of Life, g = GBIF, b = Bugguide.net