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Hydraena  Kugelann, 1794
Taxonomic Serial No.: 112757

(Download Help) Hydraena TSN 112757

 Taxonomy and Nomenclature
  Kingdom: Animalia  
  Taxonomic Rank: Genus  
  Common Name(s):    
  Taxonomic Status:    
  Current Standing: valid  
  Data Quality Indicators:    
  Record Credibility Rating: verified - standards met  
  Global Species Completeness: complete   
  Latest Record Review: 2016   

 Taxonomic Hierarchy
 KingdomAnimalia  – Animal, animaux, animals  
             PhylumArthropoda  – Artrópode, arthropodes, arthropods  
                SubphylumHexapoda  – hexapods  
                   ClassInsecta  – insects, hexapoda, inseto, insectes  
                      SubclassPterygota  – insects ailés, winged insects  
                         InfraclassNeoptera  – modern, wing-folding insects  
                               OrderColeoptera Linnaeus, 1758 – beetles, coléoptères, besouro  
                                  SuborderPolyphaga Emery, 1886  
                                     InfraorderStaphyliniformia Lameere, 1900  
                                        SuperfamilyStaphylinoidea Latreille, 1802  
                                           FamilyHydraenidae Mulsant, 1844 – minute moss beetles  
                                              SubfamilyHydraeninae Mulsant, 1844  
                                                 TribeHydraenini Mulsant, 1844  
                                                    GenusHydraena Kugelann, 1794  
    Direct Children:  
                                                       Species Hydraena abbasigili Jäch, 1988  
                                                       Species Hydraena abdita Orchymont, 1948  
                                                       Species Hydraena abyssinica Régimbart, 1905  
                                                       Species Hydraena accurata Orchymont, 1948  
                                                       Species Hydraena achaica Jäch, 1995  
                                                       Species Hydraena acumena Perkins, 2011  
                                                       Species Hydraena adelbertensis Perkins, 2011  
                                                       Species Hydraena adrastea Orchymont, 1948  
                                                       Species Hydraena aethaliensis Breit, 1917  
                                                       Species Hydraena affirmata Perkins, 2007  
                                                       Species Hydraena affusa Orchymont, 1936  
                                                       Species Hydraena africana Kuwert, 1888  
                                                       Species Hydraena akameku Perkins, 2011  
                                                       Species Hydraena akbesiana Audisio, De Biase and Jäch, 1993  
                                                       Species Hydraena albai Sáinz-Cantero, 1993  
                                                       Species Hydraena alberti Balfour-Browne, 1950  
                                                       Species Hydraena alcantarana Ienistea, 1985  
                                                       Species Hydraena algerina Kaddouri, 1992  
                                                       Species Hydraena alia Orchymont, 1934  
                                                       Species Hydraena aliciae Jäch and Díaz, 2005  
                                                       Species Hydraena allomorpha Lagar and Fresneda, 1990  
                                                       Species Hydraena alluaudi Régimbart, 1906  
                                                       Species Hydraena alpicola Pretner, 1931  
                                                       Species Hydraena altamirensis Díaz Pazos and Garrido Gonzalez, 1993  
                                                       Species Hydraena altapapua Perkins, 2011  
                                                       Species Hydraena alternata Perkins, 1980  
                                                       Species Hydraena alterra Perkins, 1980  
                                                       Species Hydraena alticola Skale and Jäch, 2008  
                                                       Species Hydraena altiphila Perkins, 2011  
                                                       Species Hydraena amazonica Perkins, 2011  
                                                       Species Hydraena ambiflagellata Zwick, 1977  
                                                       Species Hydraena ambigua Ganglbauer, 1901  
                                                       Species Hydraena ambiosina Perkins, 2007  
                                                       Species Hydraena ambra Perkins, 2011  
                                                       Species Hydraena ambripes Perkins, 2011  
                                                       Species Hydraena ambroides Perkins, 2011  
                                                       Species Hydraena americana Jäch, 1993  
                                                       Species Hydraena amidensis Jäch, 1988  
                                                       Species Hydraena ampla Perkins, 2011  
                                                       Species Hydraena anaphora Perkins, 1980  
                                                       Species Hydraena anatolica Janssens, 1963  
                                                       Species Hydraena ancylis Perkins, 1980  
                                                       Species Hydraena ancyrae Jäch, 1992  
                                                       Species Hydraena andalusa Lagar and Fresneda, 1990  
                                                       Species Hydraena andreinii Orchymont, 1934  
                                                       Species Hydraena angulicollis Notman, 1921  
                                                       Species Hydraena angulosa Mulsant, 1844  
                                                       Species Hydraena angustata Sturm, 1836  
                                                       Species Hydraena anisonycha Perkins, 1980  
                                                       Species Hydraena antaria Perkins, 2007  
                                                       Species Hydraena antiatlantica Jäch, Aguilera and Hernando, 1998  
                                                       Species Hydraena antiochena Jäch, 1988  
                                                       Species Hydraena apertista Perkins, 2011  
                                                       Species Hydraena apexa Perkins, 2011  
                                                       Species Hydraena appalachicola Perkins, 1980  
                                                       Species Hydraena appetita Perkins, 2007  
                                                       Species Hydraena aquila Perkins, 2011  
                                                       Species Hydraena arabica Balfour-Browne, 1951  
                                                       Species Hydraena arachthi Ferro and Jäch, 2000  
                                                       Species Hydraena arcta Perkins, 2007  
                                                       Species Hydraena arenicola Perkins, 1980  
                                                       Species Hydraena argutipes Perkins, 1980  
                                                       Species Hydraena ariana Janssens, 1962  
                                                       Species Hydraena arizonica Perkins, 1980  
                                                       Species Hydraena armata Reitter, 1880  
                                                       Species Hydraena armatura Perkins, 2014  
                                                       Species Hydraena armeniaca Janssens, 1968  
                                                       Species Hydraena armipalpis Jäch and Díaz, 2000  
                                                       Species Hydraena armipes Rey, 1886  
                                                       Species Hydraena aroensis (Ferro, 1991)  
                                                       Species Hydraena arunensis Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena ascensa Perkins, 2007  
                                                       Species Hydraena assimilis Rey, 1885  
                                                       Species Hydraena ateneo Freitag, 2013  
                                                       Species Hydraena athertonica Perkins, 2007  
                                                       Species Hydraena atrata Desbrochers des Loges, 1891  
                                                       Species Hydraena atroscintilla Perkins, 2011  
                                                       Species Hydraena attaleiae Ferro, 1984  
                                                       Species Hydraena audisioi Jäch, 1992  
                                                       Species Hydraena aulaarta Perkins, 2011  
                                                       Species Hydraena aurita Jäch, 1988  
                                                       Species Hydraena australica Zwick, 1977  
                                                       Species Hydraena australula Perkins, 2007  
                                                       Species Hydraena austrobesa Perkins, 2011  
                                                       Species Hydraena avuncula Jäch, 1988  
                                                       Species Hydraena bacchusi Perkins, 2011  
                                                       Species Hydraena bactriana Janssens, 1962  
                                                       Species Hydraena bakriensis Skale and Jäch, 2011  
                                                       Species Hydraena balearica Orchymont, 1930  
                                                       Species Hydraena balfourbrownei Bameul, 1986  
                                                       Species Hydraena balkei Perkins, 2011  
                                                       Species Hydraena balli Orchymont, 1940  
                                                       Species Hydraena barbipes Zwick, 1977  
                                                       Species Hydraena barricula Perkins, 1980  
                                                       Species Hydraena barrosi Orchymont, 1934  
                                                       Species Hydraena bedeli Berthélemy, 1992  
                                                       Species Hydraena belgica Orchymont, 1930  
                                                       Species Hydraena beniensis Perkins, 2011  
                                                       Species Hydraena benjaminus Jäch and Díaz, 2006  
                                                       Species Hydraena bensae Ganglbauer, 1901  
                                                       Species Hydraena bergeri (Janssens, 1972)  
                                                       Species Hydraena berthelemyana Jäch, Díaz and Dia in Jäch, Dia and Díaz, 2006  
                                                       Species Hydraena berytus Jäch, 1986  
                                                       Species Hydraena beyarslani Jäch, 1988  
                                                       Species Hydraena bicarina Perkins, 2014  
                                                       Species Hydraena bicarinova Perkins, 2011  
                                                       Species Hydraena bicolorata Jäch, 1997  
                                                       Species Hydraena bicuspidata Ganglbauer, 1901  
                                                       Species Hydraena bidefensa Perkins, 2007  
                                                       Species Hydraena bifunda Perkins, 2011  
                                                       Species Hydraena bihamata Champion, 1920  
                                                       Species Hydraena biimpressa Perkins, 2007  
                                                       Species Hydraena billi Zwick, 1977  
                                                       Species Hydraena bilobata Jäch and Díaz, 1998  
                                                       Species Hydraena biltoni Jäch and Díaz, 2012  
                                                       Species Hydraena bimagua Jäch, 1986  
                                                       Species Hydraena birendra Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena biseptosa Perkins, 2014  
                                                       Species Hydraena bispinosa Pu, 1951  
                                                       Species Hydraena bisulcata Rey, 1884  
                                                       Species Hydraena bitruncata Orchymont, 1934  
                                                       Species Hydraena bituberculata Perkins, 1980  
                                                       Species Hydraena biundulata Perkins, 2011  
                                                       Species Hydraena blackburni Zaitzev, 1908  
                                                       Species Hydraena bodemeyeri Jäch and Díaz, 2001  
                                                       Species Hydraena boetcheri Orchymont, 1932  
                                                       Species Hydraena bolivari Orchymont, 1936  
                                                       Species Hydraena boliviana Perkins, 2011  
                                                       Species Hydraena bononiensis Binaghi, 1960  
                                                       Species Hydraena borbonica Fairmaire, 1898  
                                                       Species Hydraena bosnica Apfelbeck, 1909  
                                                       Species Hydraena brachymera Orchymont, 1936  
                                                       Species Hydraena bractea Perkins, 1980  
                                                       Species Hydraena bractoides Perkins, 1980  
                                                       Species Hydraena brahmin Perkins, 2011  
                                                       Species Hydraena breedlovei Perkins, 1980  
                                                       Species Hydraena brevis Sharp, 1882  
                                                       Species Hydraena britteni Joy, 1907  
                                                       Species Hydraena brittoni Zwick, 1977  
                                                       Species Hydraena bromleyae Jäch, 1986  
                                                       Species Hydraena browni Perkins, 1980  
                                                       Species Hydraena bubulla Perkins, 2011  
                                                       Species Hydraena bulgarica Breit, 1916  
                                                       Species Hydraena buloba Perkins, 2011  
                                                       Species Hydraena buquintana Perkins, 2011  
                                                       Species Hydraena buscintilla Perkins, 2011  
                                                       Species Hydraena busuanga Freitag and Jäch, 2007  
                                                       Species Hydraena calcarifera Janssens, 1959  
                                                       Species Hydraena californica Perkins, 1980  
                                                       Species Hydraena campbelli Perkins, 1980  
                                                       Species Hydraena canakcioglui Janssens, 1965  
                                                       Species Hydraena canticacollis Perkins, 1980  
                                                       Species Hydraena capacis Perkins, 2007  
                                                       Species Hydraena capensis Perkins, 2014  
                                                       Species Hydraena capetribensis Perkins, 2007  
                                                       Species Hydraena cappadocica Jäch, 1988  
                                                       Species Hydraena caprivica Perkins, 2014  
                                                       Species Hydraena capta Orchymont, 1936  
                                                       Species Hydraena carbonaria Kiesenwetter, 1849  
                                                       Species Hydraena carica Jäch, 1988  
                                                       Species Hydraena carinocisiva Perkins, 2011  
                                                       Species Hydraena carinulata Rey, 1886  
                                                       Species Hydraena carmellita Perkins, 2011  
                                                       Species Hydraena carniolica Pretner, 1970  
                                                       Species Hydraena castanea Deane, 1937  
                                                       Species Hydraena castanescens Freitag and Jäch, 2007  
                                                       Species Hydraena cata Orchymont, 1936  
                                                       Species Hydraena catalonica Fresneda, Aguilera and Hernando, 1994  
                                                       Species Hydraena catherinae Bameul and Jäch, 2001  
                                                       Species Hydraena caucasica Kuwert, 1888  
                                                       Species Hydraena cavifrons Perkins, 2011  
                                                       Species Hydraena cephalleniaca Jäch, 1985  
                                                       Species Hydraena cervisophila Jäch, 1992  
                                                       Species Hydraena challeti Perkins, 2011  
                                                       Species Hydraena cheesmanae Perkins, 2011  
                                                       Species Hydraena chenae Pu, 1951  
                                                       Species Hydraena chersonesica Jäch, Díaz and Przewozny, 2007  
                                                       Species Hydraena cherylbarrae Perkins, 2011  
                                                       Species Hydraena chiapa Perkins, 1980  
                                                       Species Hydraena chiesai Janssens, 1965  
                                                       Species Hydraena chifengi Jäch and Díaz, 1999  
                                                       Species Hydraena chobauti Guillebeau, 1896  
                                                       Species Hydraena christinae Audisio, De Biase and Jäch, 1996  
                                                       Species Hydraena christoferi Jäch and Díaz, 2005  
                                                       Species Hydraena ciliciensis Jäch, 1988  
                                                       Species Hydraena circulata Perkins, 1980  
                                                       Species Hydraena cirrata Champion, 1920  
                                                       Species Hydraena clarinis Perkins, 2011  
                                                       Species Hydraena claudia Freitag and Jäch, 2007  
                                                       Species Hydraena clavicula Perkins, 2014  
                                                       Species Hydraena clavigera Zwick, 1977  
                                                       Species Hydraena clemens Jäch and Díaz, 2006  
                                                       Species Hydraena clinodorsa Perkins, 2011  
                                                       Species Hydraena clystera Perkins, 2011  
                                                       Species Hydraena cochabamba Perkins, 2011  
                                                       Species Hydraena colchica Janssens, 1963  
                                                       Species Hydraena colombiana Perkins, 1980  
                                                       Species Hydraena colorata Perkins, 2011  
                                                       Species Hydraena colymba Perkins, 1980  
                                                       Species Hydraena compressipilis Jäch and Díaz, 1998  
                                                       Species Hydraena concepcionica Perkins, 2011  
                                                       Species Hydraena concinna Orchymont, 1932  
                                                       Species Hydraena confluenta Perkins, 2011  
                                                       Species Hydraena confusa Pu, 1951  
                                                       Species Hydraena connexa Orchymont, 1932  
                                                       Species Hydraena converga Perkins, 2007  
                                                       Species Hydraena coomani Orchymont, 1932  
                                                       Species Hydraena cooperi Balfour-Browne, 1954  
                                                       Species Hydraena cooperoides Perkins, 2014  
                                                       Species Hydraena copulata Perkins, 2011  
                                                       Species Hydraena cordata Schaufuss, 1883  
                                                       Species Hydraena cordiformis Jäch and Díaz, 2000  
                                                       Species Hydraena cordispina Perkins, 2011  
                                                       Species Hydraena corinna Orchymont, 1936  
                                                       Species Hydraena cornelli Jäch and Díaz, 1998  
                                                       Species Hydraena corrugis Orchymont, 1934  
                                                       Species Hydraena coryleti Jäch, 1992  
                                                       Species Hydraena costiniceps Perkins, 1980  
                                                       Species Hydraena crepidoptera Jäch, 1992  
                                                       Species Hydraena cristatigena Jäch and Díaz, 2000  
                                                       Species Hydraena croatica Kuwert, 1888  
                                                       Species Hydraena cryptostoma Jäch, 1992  
                                                       Species Hydraena crystallina Perkins, 1980  
                                                       Species Hydraena cubista Perkins, 2007  
                                                       Species Hydraena cultrata Perkins, 2007  
                                                       Species Hydraena cunicula Perkins, 2011  
                                                       Species Hydraena cunninghamensis Perkins, 2007  
                                                       Species Hydraena curta Kiesenwetter, 1849  
                                                       Species Hydraena curtipalpis Jäch and Díaz, 1998  
                                                       Species Hydraena curvipes Jäch and Díaz, 2012  
                                                       Species Hydraena curvosa Perkins, 2011  
                                                       Species Hydraena cuspidicollis Perkins, 1980  
                                                       Species Hydraena cyclops Jäch and Díaz, 2000  
                                                       Species Hydraena cygnus Zwick, 1977  
                                                       Species Hydraena czernohorskyi Müller, 1911  
                                                       Species Hydraena d-concava Perkins, 2011  
                                                       Species Hydraena d-destina Perkins, 1980  
                                                       Species Hydraena dalmatina Ganglbauer, 1901  
                                                       Species Hydraena damascena Pic, 1910  
                                                       Species Hydraena dariensis Perkins, 2011  
                                                       Species Hydraena darwini Perkins, 2007  
                                                       Species Hydraena debeckeri (Janssens, 1972)  
                                                       Species Hydraena decepta Perkins, 2011  
                                                       Species Hydraena decipiens Zwick, 1977  
                                                       Species Hydraena decolor Sainte-Claire Deville, 1903  
                                                       Species Hydraena decui Spangler, 1980  
                                                       Species Hydraena delia Balfour-Browne, 1978  
                                                       Species Hydraena deliquesca Perkins, 2007  
                                                       Species Hydraena delvasi Delgado and Collantes, 1996  
                                                       Species Hydraena densa Fauvel, 1883  
                                                       Species Hydraena dentipalpis Reitter, 1888  
                                                       Species Hydraena dentipes Germar, 1824  
                                                       Species Hydraena devillei Ganglbauer, 1901  
                                                       Species Hydraena devincta Orchymont, 1940  
                                                       Species Hydraena diadema Perkins, 2011  
                                                       Species Hydraena diazi Trizzino, Jäch and Ribera in Trizzino, Jäch, Audisio and Rivera, 2011  
                                                       Species Hydraena diffusa Perkins, 2011  
                                                       Species Hydraena dilutipes Fairmaire, 1898  
                                                       Species Hydraena dimorpha Orchymont, 1922  
                                                       Species Hydraena dinosaurophila Jäch, 1994  
                                                       Species Hydraena discicollis Fairmaire, 1898  
                                                       Species Hydraena discreta Ganglbauer, 1904  
                                                       Species Hydraena disparamera Perkins, 2007  
                                                       Species Hydraena dochula Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena dolichogaster Janssens, 1965  
                                                       Species Hydraena dorrigoensis Perkins, 2007  
                                                       Species Hydraena draconisaurati Jäch and Díaz, 2005  
                                                       Species Hydraena dudgeoni Perkins, 2011  
                                                       Species Hydraena duodecimata Perkins, 2014  
                                                       Species Hydraena duohamata Perkins, 2011  
                                                       Species Hydraena ebriimadli Jäch, 1988  
                                                       Species Hydraena ecuadormica Perkins, 2011  
                                                       Species Hydraena egoni Jäch, 1986  
                                                       Species Hydraena eichleri Orchymont, 1937  
                                                       Species Hydraena einsteini Perkins, 2011  
                                                       Species Hydraena elephanta Perkins, 2014  
                                                       Species Hydraena elisabethae Jäch, 1992  
                                                       Species Hydraena eliya Jäch, 1982  
                                                       Species Hydraena emarginata Rey, 1885  
                                                       Species Hydraena emineae Jäch and Kasapoglu, 2006  
                                                       Species Hydraena epeirosi Ferro, 1985  
                                                       Species Hydraena errina Orchymont, 1948  
                                                       Species Hydraena erythraea Régimbart, 1905  
                                                       Species Hydraena eryx Orchymont, 1948  
                                                       Species Hydraena esquinita Brojer and Jäch, 2011  
                                                       Species Hydraena essentia Perkins, 2011  
                                                       Species Hydraena eucnemis Janssens, 1970  
                                                       Species Hydraena evanescens Rey, 1884  
                                                       Species Hydraena evansi Balfour-Browne, 1945  
                                                       Species Hydraena exarata Kiesenwetter, 1866  
                                                       Species Hydraena exasperata Orchymont, 1935  
                                                       Species Hydraena excisa Kiesenwetter, 1849  
                                                       Species Hydraena exhalista Perkins, 2011  
                                                       Species Hydraena exilipes Perkins, 1980  
                                                       Species Hydraena expedita Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena explanata Pic, 1905  
                                                       Species Hydraena extorris Zwick, 1977  
                                                       Species Hydraena falcata Jäch, 1992  
                                                       Species Hydraena farsensis Skale and Jäch, 2011  
                                                       Species Hydraena fasciata Perkins, 2011  
                                                       Species Hydraena fascinata Perkins, 2011  
                                                       Species Hydraena fasciola Perkins, 2011  
                                                       Species Hydraena fasciolata Perkins, 2011  
                                                       Species Hydraena fasciopaca Perkins, 2011  
                                                       Species Hydraena favulosa Perkins, 2014  
                                                       Species Hydraena fenestella Perkins, 2011  
                                                       Species Hydraena ferethula Perkins, 2007  
                                                       Species Hydraena feryi Skale and Jäch, 2011  
                                                       Species Hydraena feuerborni Orchymont, 1932  
                                                       Species Hydraena fijiensis Balfour-Browne, 1945  
                                                       Species Hydraena filum Sahlberg, 1908  
                                                       Species Hydraena finita Orchymont, 1943  
                                                       Species Hydraena finki Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena finniganensis Perkins, 2007  
                                                       Species Hydraena fiorii Porta, 1899  
                                                       Species Hydraena fischeri Schönmann, 1991  
                                                       Species Hydraena flagella Perkins, 2011  
                                                       Species Hydraena fluvicola (Perkins, 1980)  
                                                       Species Hydraena foliobba Perkins, 2011  
                                                       Species Hydraena fontana Orchymont, 1932  
                                                       Species Hydraena fontiscarsavii (Jäch, 1988)  
                                                       Species Hydraena formosapala Perkins, 2011  
                                                       Species Hydraena formula Orchymont, 1932  
                                                       Species Hydraena forticollis Perkins, 2007  
                                                       Species Hydraena fosterorum Trizzino, Jäch and Ribera in Trizzino, Jäch, Audisio and Rivera, 2011  
                                                       Species Hydraena franklyni Deler-Hernández and Delgado, 2012  
                                                       Species Hydraena freitagi Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena frenzeli Skale and Jäch, 2008  
                                                       Species Hydraena fritzi Jäch, 1992  
                                                       Species Hydraena frondsicola (Perkins, 1980)  
                                                       Species Hydraena funda Perkins, 2011  
                                                       Species Hydraena fundacta Perkins, 2011  
                                                       Species Hydraena fundaequalis Perkins, 2007  
                                                       Species Hydraena fundapta Perkins, 2011  
                                                       Species Hydraena fundarca Perkins, 2011  
                                                       Species Hydraena fundata Perkins, 2007  
                                                       Species Hydraena fundextra Perkins, 2011  
                                                       Species Hydraena furthi Jäch, 1982  
                                                       Species Hydraena gaditana Lagar and Fresneda, 1990  
                                                       Species Hydraena galatica Janssens, 1970  
                                                       Species Hydraena galea Perkins, 2011  
                                                       Species Hydraena gavarrensis Jäch, Díaz and Martinoy, 2005  
                                                       Species Hydraena geminya Perkins, 1980  
                                                       Species Hydraena genumorpha Perkins, 2014  
                                                       Species Hydraena georgiadesi Orchymont, 1931  
                                                       Species Hydraena geraldneuhauseri Jäch and Díaz, 2006  
                                                       Species Hydraena germaini Orchymont, 1923  
                                                       Species Hydraena glassmani Jäch, 1986  
                                                       Species Hydraena gnatella Orchymont, 1945  
                                                       Species Hydraena gnatelloides Orchymont, 1945  
                                                       Species Hydraena gracilidelphis Trizzino, Valladares, Garrido and Audisio, 2012  
                                                       Species Hydraena gracilis Germar, 1824  
                                                       Species Hydraena graciloides (Jäch, 1988)  
                                                       Species Hydraena grandis Reitter, 1885  
                                                       Species Hydraena graphica Orchymont, 1931  
                                                       Species Hydraena grata Orchymont, 1944  
                                                       Species Hydraena gregalis Orchymont, 1944  
                                                       Species Hydraena gressa Orchymont, 1944  
                                                       Species Hydraena griphus Orchymont, 1944  
                                                       Species Hydraena grouvellei Orchymont, 1923  
                                                       Species Hydraena grueberi Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena guadelupensis Orchymont, 1923  
                                                       Species Hydraena guangxiensis Jäch and Díaz, 2005  
                                                       Species Hydraena guatemala Perkins, 1980  
                                                       Species Hydraena guentheri Jäch, 1992  
                                                       Species Hydraena guilin Jäch and Díaz, 2005  
                                                       Species Hydraena gynaephila Jäch, 1997  
                                                       Species Hydraena habitiva Perkins, 2014  
                                                       Species Hydraena hainzi Jäch, 1988  
                                                       Species Hydraena haitensis Perkins, 1980  
                                                       Species Hydraena hajeki Skale and Jäch, 2011  
                                                       Species Hydraena hamifera Zwick, 1977  
                                                       Species Hydraena hansreuteri Jäch and Díaz, 2005  
                                                       Species Hydraena hayashii Jäch and Díaz, 2012  
                                                       Species Hydraena helena Orchymont, 1929  
                                                       Species Hydraena hendrichi Jäch, Díaz and Skale, 2013  
                                                       Species Hydraena hernandoi Fresneda and Lagar, 1990  
                                                       Species Hydraena herzogestella Perkins, 2011  
                                                       Species Hydraena heterogyna Bedel, 1898  
                                                       Species Hydraena hiekei Jäch, 1992  
                                                       Species Hydraena hillaryi Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena hintoni Perkins, 2011  
                                                       Species Hydraena hispanica Ganglbauer, 1901  
                                                       Species Hydraena holdhausi Pretner, 1929  
                                                       Species Hydraena hornabrooki Perkins, 2011  
                                                       Species Hydraena hortensis Jäch and Díaz, 2000  
                                                       Species Hydraena hosiwergi Freitag and Jäch, 2007  
                                                       Species Hydraena hosseinieorum Bilton and Jäch, 1998  
                                                       Species Hydraena huangshanensis Jäch and Díaz, 2005  
                                                       Species Hydraena huitongensis Jäch and Díaz, 2005  
                                                       Species Hydraena humanica Perkins, 2014  
                                                       Species Hydraena hunanensis Pu, 1951  
                                                       Species Hydraena hungarica Rey, 1884  
                                                       Species Hydraena huonica Perkins, 2011  
                                                       Species Hydraena hyalina Perkins, 1980  
                                                       Species Hydraena hynesi Zwick, 1977  
                                                       Species Hydraena hypipamee Perkins, 2007  
                                                       Species Hydraena ibalimi Perkins, 2011  
                                                       Species Hydraena iberica Orchymont, 1936  
                                                       Species Hydraena idema Perkins, 2011  
                                                       Species Hydraena iheya Jäch and Díaz, 1999  
                                                       Species Hydraena ilamensis Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena ilica Jäch, 1994  
                                                       Species Hydraena imbria Jäch and Díaz, 2001  
                                                       Species Hydraena impala Perkins, 2011  
                                                       Species Hydraena imperatrix Kniz, 1919  
                                                       Species Hydraena impercepta Zwick, 1977  
                                                       Species Hydraena impressicollis Fairmaire, 1898  
                                                       Species Hydraena inancala Perkins, 2007  
                                                       Species Hydraena inapicipalpis Pic, 1918  
                                                       Species Hydraena incisiva Perkins, 2011  
                                                       Species Hydraena incista Perkins, 2011  
                                                       Species Hydraena incurva Orchymont, 1932  
                                                       Species Hydraena indiana Jäch, 1994  
                                                       Species Hydraena indica Orchymont, 1920  
                                                       Species Hydraena infoveola Perkins, 2011  
                                                       Species Hydraena ingens (Perkins, 1980)  
                                                       Species Hydraena inhalista Perkins, 2011  
                                                       Species Hydraena injectiva Perkins, 2014  
                                                       Species Hydraena innuda Perkins, 2007  
                                                       Species Hydraena inopinata Jäch and Díaz, 1998  
                                                       Species Hydraena inplacopaca Perkins, 2011  
                                                       Species Hydraena insandalia Perkins, 2011  
                                                       Species Hydraena insita Orchymont, 1932  
                                                       Species Hydraena insolita Orchymont, 1932  
                                                       Species Hydraena insularis Orchymont, 1945  
                                                       Species Hydraena integra Pretner, 1931  
                                                       Species Hydraena intensa Perkins, 2011  
                                                       Species Hydraena intermedia Rosenhauer, 1847  
                                                       Species Hydraena intraangulata Perkins, 2007  
                                                       Species Hydraena inusta Orchymont, 1932  
                                                       Species Hydraena invicta Perkins, 2007  
                                                       Species Hydraena iriomotensis Jäch and Díaz, 1999  
                                                       Species Hydraena isabelae Castro and Herrera, 2001  
                                                       Species Hydraena isolinae Jäch and Díaz, 1998  
                                                       Species Hydraena ispirensis Kasapoglu, Jäch and Skale, 2010  
                                                       Species Hydraena iterata Orchymont, 1948  
                                                       Species Hydraena jacobsoni Orchymont, 1932  
                                                       Species Hydraena jaechiana (Audisio and De Biase, 1990)  
                                                       Species Hydraena jaegeri Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena jailensis Breit, 1917  
                                                       Species Hydraena janczyki Jäch, 1992  
                                                       Species Hydraena janeceki Jäch, 1987  
                                                       Species Hydraena janssensi Nilsson, 2001  
                                                       Species Hydraena jengi Jäch and Díaz, 1998  
                                                       Species Hydraena jilanzhui Jäch and Díaz, 2005  
                                                       Species Hydraena jivaro Perkins, 1980  
                                                       Species Hydraena johncoltranei Perkins, 2011  
                                                       Species Hydraena jubilata Perkins, 2011  
                                                       Species Hydraena kadowakii Jäch and Díaz, 2012  
                                                       Species Hydraena kakadu Perkins, 2007  
                                                       Species Hydraena kamitei Jäch and Díaz, 2012  
                                                       Species Hydraena karinkukolae Jäch, 1989  
                                                       Species Hydraena karmai Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena kasyi Jäch, 1992  
                                                       Species Hydraena kaufmanni Ganglbauer, 1901  
                                                       Species Hydraena kellymilleri Perkins, 2011  
                                                       Species Hydraena khnzoriani Janssens, 1968  
                                                       Species Hydraena kilimandjarensis Régimbart, 1906  
                                                       Species Hydraena kitayamai Jäch and Díaz, 2012  
                                                       Species Hydraena knischi Orchymont, 1928  
                                                       Species Hydraena kocheri Berthélemy, 1992  
                                                       Species Hydraena kodadai Freitag and Jäch, 2007  
                                                       Species Hydraena koje Perkins, 2011  
                                                       Species Hydraena koma Perkins, 2011  
                                                       Species Hydraena krasnodarensis Jäch and Díaz, 2006  
                                                       Species Hydraena kroumiriana Kaddouri, 1992  
                                                       Species Hydraena kucinici Micetic Stankovic and Jäch, 2012  
                                                       Species Hydraena kuehnelti Jäch, 1989  
                                                       Species Hydraena kurdistanica Jäch, 1988  
                                                       Species Hydraena kwangsiensis Pu, 1951  
                                                       Species Hydraena labropaca Perkins, 2011  
                                                       Species Hydraena lagamba Brojer and Jäch, 2011  
                                                       Species Hydraena lapidicola Kiesenwetter, 1849  
                                                       Species Hydraena lapissectilis Jäch, 1992  
                                                       Species Hydraena larissae Jäch and Díaz, 2000  
                                                       Species Hydraena larsoni Perkins, 2007  
                                                       Species Hydraena lascrucensis Brojer and Jäch, 2011  
                                                       Species Hydraena lassulipes Perkins, 2011  
                                                       Species Hydraena latebricola Jäch, 1986  
                                                       Species Hydraena latisoror Perkins, 2007  
                                                       Species Hydraena lazica Janssens, 1963  
                                                       Species Hydraena leechi Perkins, 1980  
                                                       Species Hydraena leei Jäch and Díaz, 1998  
                                                       Species Hydraena legorskyi Jäch and Brojer, 2012  
                                                       Species Hydraena lehmanni Jäch and Díaz, 2005  
                                                       Species Hydraena leonhardi Breit, 1916  
                                                       Species Hydraena leprieuri Sainte-Claire Deville, 1905  
                                                       Species Hydraena levantina Sahlberg, 1908  
                                                       Species Hydraena ligulipes Jäch, 1988  
                                                       Species Hydraena lilianae Perkins, 2011  
                                                       Species Hydraena limbobesa Perkins, 2011  
                                                       Species Hydraena limpidicollis Perkins, 1980  
                                                       Species Hydraena liriope Orchymont, 1943  
                                                       Species Hydraena longicollis Sharp, 1882  
                                                       Species Hydraena loripes Perkins, 2011  
                                                       Species Hydraena lotti Bilton, 2013  
                                                       Species Hydraena lucasi Lagar, 1984  
                                                       Species Hydraena lucernae Zwick, 1977  
                                                       Species Hydraena ludovicae Orchymont, 1931  
                                                       Species Hydraena luminicollis Perkins, 2007  
                                                       Species Hydraena luridipennis MacLeay, 1873  
                                                       Species Hydraena lusitana (Berthélemy in Berthélemy and Whytton Da Terra, 1977)  
                                                       Species Hydraena lycia Jäch, 1988  
                                                       Species Hydraena macedonica Orchymont, 1931  
                                                       Species Hydraena maculicollis Champion, 1920  
                                                       Species Hydraena maculopala Perkins, 2011  
                                                       Species Hydraena madronensis Castor, García and Ferreras, 2000  
                                                       Species Hydraena magna Pu, 1951  
                                                       Species Hydraena magnessa Jäch, 1997  
                                                       Species Hydraena magnetica Zwick, 1977  
                                                       Species Hydraena mahensis Scott, 1913  
                                                       Species Hydraena malagricola Jäch and Díaz, 2012  
                                                       Species Hydraena malickyi Jäch, 1989  
                                                       Species Hydraena malkini Perkins, 1980  
                                                       Species Hydraena manabica Perkins, 2011  
                                                       Species Hydraena manaslu Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena manfredjaechi Delgado and Soler, 1991  
                                                       Species Hydraena manguao Freitag and Jäch, 2007  
                                                       Species Hydraena manulea Perkins, 2011  
                                                       Species Hydraena manuloides Perkins, 2011  
                                                       Species Hydraena marawaka Perkins, 2011  
                                                       Species Hydraena marcosae Aguilera, Hernando and Ribera, 1997  
                                                       Species Hydraena marginicollis Kiesenwetter, 1849  
                                                       Species Hydraena mariannae Jäch, 1992  
                                                       Species Hydraena marinae Castro, 2003  
                                                       Species Hydraena martensi Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena martinschoepfi Jäch and Díaz, 2005  
                                                       Species Hydraena masatakai Jäch and Díaz, 2003  
                                                       Species Hydraena maureenae Perkins, 1980  
                                                       Species Hydraena mauriciogarciai Perkins, 2011  
                                                       Species Hydraena mazamitla Perkins, 1980  
                                                       Species Hydraena mecai Millán and Aguilera, 2000  
                                                       Species Hydraena melas Dalla Torre, 1877  
                                                       Species Hydraena mercuriala Perkins, 2011  
                                                       Species Hydraena meschniggi Pretner, 1929  
                                                       Species Hydraena metzeni Perkins, 2007  
                                                       Species Hydraena mexicana Perkins, 1980  
                                                       Species Hydraena mianminica Perkins, 2011  
                                                       Species Hydraena michaelbalkei Jäch, Díaz and Skale, 2013  
                                                       Species Hydraena mignymixys Perkins, 1980  
                                                       Species Hydraena millerorum Perkins, 2007  
                                                       Species Hydraena miniretia Perkins, 2007  
                                                       Species Hydraena mintrita Perkins, 2011  
                                                       Species Hydraena mitchellensis Perkins, 2007  
                                                       Species Hydraena miyatakei Satô, 1959  
                                                       Species Hydraena modili Jäch, 1988  
                                                       Species Hydraena monikae Jäch and Díaz, 2000  
                                                       Species Hydraena monscassius Jäch, 1988  
                                                       Species Hydraena monstruosipes Ferro, 1986  
                                                       Species Hydraena monteithi Perkins, 2007  
                                                       Species Hydraena morio Kiesenwetter, 1849  
                                                       Species Hydraena motzfeldi Skale and Jäch, 2011  
                                                       Species Hydraena mouzaiensis Sainte-Claire Deville, 1909  
                                                       Species Hydraena mpumalanga Perkins, 2014  
                                                       Species Hydraena muelleri Pretner, 1931  
                                                       Species Hydraena muezziginea Jäch, 1988  
                                                       Species Hydraena multiloba Perkins, 2011  
                                                       Species Hydraena multimurata Perkins, 2014  
                                                       Species Hydraena multispina Perkins, 2011  
                                                       Species Hydraena mylasae Jäch, 1992  
                                                       Species Hydraena namibiensis Perkins, 2014  
                                                       Species Hydraena nanocolorata Perkins, 2011  
                                                       Species Hydraena nanopala Perkins, 2011  
                                                       Species Hydraena nanoscintilla Perkins, 2011  
                                                       Species Hydraena natiforma Perkins, 2014  
                                                       Species Hydraena neblina Perkins, 2011  
                                                       Species Hydraena nelsonmandelai Makhan, 2008  
                                                       Species Hydraena neoaccurata Perkins, 2014  
                                                       Species Hydraena nevermanni Perkins, 1980  
                                                       Species Hydraena newtoni Perkins, 1980  
                                                       Species Hydraena nielshaggei Freitag and Jäch, 2007  
                                                       Species Hydraena nigra Hatch, 1965  
                                                       Species Hydraena nigrita Germar, 1824  
                                                       Species Hydraena nike Jäch, 1995  
                                                       Species Hydraena nilguenae (Jäch, 1988)  
                                                       Species Hydraena nitidimenta Perkins, 2011  
                                                       Species Hydraena nivalis Jäch, 1992  
                                                       Species Hydraena nomenipes Perkins, 2014  
                                                       Species Hydraena notsui Satô, 1978  
                                                       Species Hydraena novacula Perkins, 2011  
                                                       Species Hydraena numidica Sainte-Claire Deville, 1905  
                                                       Species Hydraena nurabadensis Skale and Jäch, 2011  
                                                       Species Hydraena nuratauensis Jäch, 1994  
                                                       Species Hydraena oaxaca Perkins, 1980  
                                                       Species Hydraena oblio Perkins, 1980  
                                                       Species Hydraena occidentalis Perkins, 1980  
                                                       Species Hydraena occitana (Audisio and De Biase, 1995)  
                                                       Species Hydraena okapa Perkins, 2011  
                                                       Species Hydraena okinawensis Jäch and Díaz, 1999  
                                                       Species Hydraena olidipastoris Jäch, 1988  
                                                       Species Hydraena ollopa Perkins, 2011  
                                                       Species Hydraena optica Jäch and Díaz, 2012  
                                                       Species Hydraena orchis Jäch and Díaz, 1998  
                                                       Species Hydraena orcula Perkins, 1980  
                                                       Species Hydraena ordishi Delgado and Palma, 1997  
                                                       Species Hydraena orientalis Breit, 1916  
                                                       Species Hydraena ortali Jäch, 1986  
                                                       Species Hydraena orthosia Jäch, Díaz and Dia in Jäch, Dia and Díaz, 2006  
                                                       Species Hydraena otiarca Perkins, 2011  
                                                       Species Hydraena ovata Janssens, 1961  
                                                       Species Hydraena owenobesa Perkins, 2011  
                                                       Species Hydraena oxiana Janssens, 1974  
                                                       Species Hydraena ozarkensis Perkins, 1980  
                                                       Species Hydraena pachyptera Apfelbeck, 1909  
                                                       Species Hydraena pacifica Perkins, 1980  
                                                       Species Hydraena pacificica Perkins, 2011  
                                                       Species Hydraena paeminosa Perkins, 1980  
                                                       Species Hydraena pagaluensis Hernando and Ribera, 2001  
                                                       Species Hydraena paganettii Ganglbauer, 1901  
                                                       Species Hydraena pajarita Brojer and Jäch, 2011  
                                                       Species Hydraena pakistanica Jäch, 1992  
                                                       Species Hydraena pala Perkins, 2011  
                                                       Species Hydraena palamita Perkins, 2011  
                                                       Species Hydraena palawanensis Freitag and Jäch, 2007  
                                                       Species Hydraena pallidula Sainte-Claire Deville, 1909  
                                                       Species Hydraena palustris Erichson, 1837  
                                                       Species Hydraena pamirica Jäch, 1992  
                                                       Species Hydraena pamphylia Jäch and Díaz, 2001  
                                                       Species Hydraena pangaei Jäch, 1992  
                                                       Species Hydraena pantanalensis Perkins, 2011  
                                                       Species Hydraena paraguayensis Janssens, 1972  
                                                       Species Hydraena parciplumea Perkins, 2007  
                                                       Species Hydraena particeps Perkins, 1980  
                                                       Species Hydraena parva Zwick, 1977  
                                                       Species Hydraena parysatis Janssens, 1981  
                                                       Species Hydraena paucistriata Jäch and Díaz, 2000  
                                                       Species Hydraena paulmoritz Jäch, Díaz and Skale, 2013  
                                                       Species Hydraena pavicula Perkins, 1980  
                                                       Species Hydraena paxillipes Perkins, 2011  
                                                       Species Hydraena peckorum Perkins, 2011  
                                                       Species Hydraena pectenata Perkins, 2011  
                                                       Species Hydraena pedroaguilerai Perkins, 2011  
                                                       Species Hydraena pegopyga Perkins, 2011  
                                                       Species Hydraena pelops Jäch, 1995  
                                                       Species Hydraena pensylvanica Kiesenwetter, 1849  
                                                       Species Hydraena penultimata Perkins, 2011  
                                                       Species Hydraena perkinsi Spangler, 1980  
                                                       Species Hydraena perlonga Balfour-Browne, 1950  
                                                       Species Hydraena perpunctata Perkins, 2011  
                                                       Species Hydraena persica Janssens, 1981  
                                                       Species Hydraena pertransversa Perkins, 2011  
                                                       Species Hydraena peru Perkins, 1980  
                                                       Species Hydraena pesici Skale and Jäch, 2011  
                                                       Species Hydraena petila Perkins, 1980  
                                                       Species Hydraena phainops Perkins, 2011  
                                                       Species Hydraena phallerata Orchymont, 1944  
                                                       Species Hydraena phallica Orchymont, 1930  
                                                       Species Hydraena phassilyi Orchymont, 1931  
                                                       Species Hydraena philippi Jäch and Díaz, 2005  
                                                       Species Hydraena philyra Orchymont, 1944  
                                                       Species Hydraena phoenicia Jäch, Díaz and Dia in Jäch, Dia and Díaz, 2006  
                                                       Species Hydraena photogenica Perkins, 2011  
                                                       Species Hydraena pici Sainte-Claire Deville, 1905  
                                                       Species Hydraena picula Perkins, 2011  
                                                       Species Hydraena pilimera Brojer and Jäch, 2011  
                                                       Species Hydraena pilipes Zwick, 1977  
                                                       Species Hydraena pilulambra Perkins, 2011  
                                                       Species Hydraena pindica Janssens, 1965  
                                                       Species Hydraena pisciforma Perkins, 2014  
                                                       Species Hydraena planata Kiesenwetter, 1849  
                                                       Species Hydraena plastica Orchymont, 1943  
                                                       Species Hydraena platycnemis Jäch, 1988  
                                                       Species Hydraena platynaspis Jäch, 1988  
                                                       Species Hydraena platysoma Janssens, 1968  
                                                       Species Hydraena plaumanni Orchymont, 1937  
                                                       Species Hydraena plumipes Rey, 1886  
                                                       Species Hydraena pluralticola Perkins, 2011  
                                                       Species Hydraena plurifurcata Jäch and Díaz, 1998  
                                                       Species Hydraena polita Kiesenwetter, 1849  
                                                       Species Hydraena pontequula Perkins, 1980  
                                                       Species Hydraena pontica Janssens, 1963  
                                                       Species Hydraena porchi Perkins, 2007  
                                                       Species Hydraena porcula Jäch and Díaz, 1998  
                                                       Species Hydraena praetermissa Jäch, 1987  
                                                       Species Hydraena premordica Perkins, 1980  
                                                       Species Hydraena pretneri Chiesa, 1927  
                                                       Species Hydraena prieto Perkins, 1980  
                                                       Species Hydraena princeps Fauvel, 1903  
                                                       Species Hydraena processa Perkins, 2011  
                                                       Species Hydraena producta Mulsant and Rey, 1852  
                                                       Species Hydraena proesei Skale and Jäch, 2011  
                                                       Species Hydraena profunda Perkins, 2014  
                                                       Species Hydraena prokini Jäch and Díaz, 2006  
                                                       Species Hydraena propria Perkins, 2011  
                                                       Species Hydraena prusensis Jäch, 1992  
                                                       Species Hydraena pseudocirrata Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena pseudopalawanensis Freitag and Jäch, 2007  
                                                       Species Hydraena pseudoriparia Orchymont, 1945  
                                                       Species Hydraena puetzi Jäch, 1994  
                                                       Species Hydraena pugillista Perkins, 2007  
                                                       Species Hydraena pulchella Germar, 1824  
                                                       Species Hydraena pulsatrix Perkins, 1980  
                                                       Species Hydraena punctata LeConte, 1855  
                                                       Species Hydraena puncticollis Sharp, 1882  
                                                       Species Hydraena punctilata Perkins, 2011  
                                                       Species Hydraena putearius Jäch and Díaz, 2000  
                                                       Species Hydraena pygmaea Waterhouse, 1833  
                                                       Species Hydraena quadrata (Janssens, 1980)  
                                                       Species Hydraena quadricollis Wollaston, 1864  
                                                       Species Hydraena quadricurvipes Perkins, 1980  
                                                       Species Hydraena quadriplumipes Perkins, 2011  
                                                       Species Hydraena quechua Perkins, 1980  
                                                       Species Hydraena queenslandica Perkins, 2007  
                                                       Species Hydraena quetiae Castro, 2000  
                                                       Species Hydraena quilisi Lagar, Fresneda and Fernando, 1987  
                                                       Species Hydraena quintana Perkins, 2011  
                                                       Species Hydraena ramuensis Perkins, 2011  
                                                       Species Hydraena ramuquintana Perez, 2011  
                                                       Species Hydraena receptiva Perkins, 2011  
                                                       Species Hydraena reflectiva Perkins, 2014  
                                                       Species Hydraena regimbarti Zaitzev, 1908  
                                                       Species Hydraena remulipes Perkins, 2011  
                                                       Species Hydraena reticulata Zwick, 1977  
                                                       Species Hydraena reticuloides Perkins, 2007  
                                                       Species Hydraena reticulositis Perkins, 2007  
                                                       Species Hydraena revelovela Perkins, 2007  
                                                       Species Hydraena reverberata Perkins, 2011  
                                                       Species Hydraena reyi Kuwert, 1888  
                                                       Species Hydraena rhinoceros (Janssens, 1972)  
                                                       Species Hydraena rhodia Jäch, 1985  
                                                       Species Hydraena riberai Jäch, Aguilera and Hernando, 1998  
                                                       Species Hydraena richardimbi Jäch, 1992  
                                                       Species Hydraena rigua Orchymont, 1931  
                                                       Species Hydraena ripaeaureae (Janssens, 1972)  
                                                       Species Hydraena riparia Kugelann, 1794  
                                                       Species Hydraena rivularis Guillebeau, 1896  
                                                       Species Hydraena robusta Zwick, 1977  
                                                       Species Hydraena rosannae Audisio, Trizzino and De Biase in Audisio, Trizzino, De Biase, Mancini and Antonini, 2009  
                                                       Species Hydraena rudallensis Blackburn, 1896  
                                                       Species Hydraena rufipennis Boscá Berga, 1932  
                                                       Species Hydraena rufipes Curtis, 1830  
                                                       Species Hydraena rugosa Mulsant, 1844  
                                                       Species Hydraena ruinosa Zwick, 1977  
                                                       Species Hydraena rukiyeae Kasapoglu, Jäch and Skale, 2010  
                                                       Species Hydraena sabella Perkins, 1980  
                                                       Species Hydraena saga Orchymont, 1930  
                                                       Species Hydraena sagatai Perkins, 2011  
                                                       Species Hydraena sahlbergi Orchymont, 1923  
                                                       Species Hydraena saluta Perkins, 2011  
                                                       Species Hydraena samia Jäch, 1986  
                                                       Species Hydraena samnitica Knisch, 1924  
                                                       Species Hydraena sanagergelyae Brojer and Jäch, 2011  
                                                       Species Hydraena sanfilippoi (Audisio and De Biase, 1995)  
                                                       Species Hydraena sappho Janssens, 1965  
                                                       Species Hydraena sardoa Binaghi, 1961  
                                                       Species Hydraena satoi Jäch and Díaz, 1999  
                                                       Species Hydraena sautakei Jäch and Díaz, 1999  
                                                       Species Hydraena sauteri Orchymont, 1913  
                                                       Species Hydraena scabra Orchymont, 1925  
                                                       Species Hydraena scabrosa Orchymont, 1931  
                                                       Species Hydraena schawalleri Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena schilfii Jäch, 1988  
                                                       Species Hydraena schillhammeri Jäch, 1988  
                                                       Species Hydraena schmidi Jäch and Díaz, 2001  
                                                       Species Hydraena schoedli Jäch, 1992  
                                                       Species Hydraena schoenmanni Jäch, 1988  
                                                       Species Hydraena schubertorum Jäch and Díaz, 2001  
                                                       Species Hydraena schuelkei Jäch, 1992  
                                                       Species Hydraena schuleri Ganglbauer, 1901  
                                                       Species Hydraena scintilla Perkins, 1980  
                                                       Species Hydraena scintillabella Perkins, 1980  
                                                       Species Hydraena scintillamima Perkins, 2011  
                                                       Species Hydraena scintillapicta Perkins, 2011  
                                                       Species Hydraena scintillarca Perkins, 2011  
                                                       Species Hydraena scintillutea Perkins, 1980  
                                                       Species Hydraena scitula Orchymont, 1943  
                                                       Species Hydraena scolops Perkins, 1980  
                                                       Species Hydraena scopula Perkins, 1980  
                                                       Species Hydraena scythica Janssens, 1974  
                                                       Species Hydraena sebastiani Perkins, 2014  
                                                       Species Hydraena sepikramuensis Perkins, 2011  
                                                       Species Hydraena septemlacuum Jäch, 1992  
                                                       Species Hydraena serpentina Jäch, 1988  
                                                       Species Hydraena serricollis Wollaston, 1864  
                                                       Species Hydraena servilia Orchymont, 1936  
                                                       Species Hydraena sexarcuata Perkins, 2011  
                                                       Species Hydraena sexsuprema Perkins, 2011  
                                                       Species Hydraena sharmai Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena sharpi Rey, 1886  
                                                       Species Hydraena shorti Perkins, 2011  
                                                       Species Hydraena sicula Kiesenwetter, 1849  
                                                       Species Hydraena sidon Jäch, Díaz and Dia in Jäch, Dia and Díaz, 2006  
                                                       Species Hydraena sierra Perkins, 1980  
                                                       Species Hydraena similis Orchymont, 1930  
                                                       Species Hydraena simonidea Orchymont, 1931  
                                                       Species Hydraena simplicicollis Blackburn, 1896  
                                                       Species Hydraena simplipes Zwick, 1977  
                                                       Species Hydraena singaporensis Jäch, Díaz and Skale, 2013  
                                                       Species Hydraena sinope Jäch, 1992  
                                                       Species Hydraena smyrnensis Sahlberg, 1908  
                                                       Species Hydraena socius Jäch and Díaz, 1999  
                                                       Species Hydraena solarii Pretner, 1930  
                                                       Species Hydraena solodovnikovi Jäch and Díaz, 2006  
                                                       Species Hydraena sordida Sharp, 1882  
                                                       Species Hydraena spangleri Perkins, 1980  
                                                       Species Hydraena spatula Perkins, 2011  
                                                       Species Hydraena speciosa Orchymont, 1944  
                                                       Species Hydraena spinipes Baudi, 1882  
                                                       Species Hydraena spinissima Perkins, 2007  
                                                       Species Hydraena spinobesa Perkins, 2011  
                                                       Species Hydraena splecoma Perkins, 1980  
                                                       Species Hydraena squalida Orchymont, 1932  
                                                       Species Hydraena stefani Jäch and Díaz, 2005  
                                                       Species Hydraena steineri Perkins, 2011  
                                                       Species Hydraena stellula Perkins, 2011  
                                                       Species Hydraena storeyi Perkins, 2007  
                                                       Species Hydraena striolata Perkins, 2011  
                                                       Species Hydraena stussineri Kuwert, 1888  
                                                       Species Hydraena subacuminata Rey, 1884  
                                                       Species Hydraena subgrandis Jäch, 1988  
                                                       Species Hydraena subimpressa Rey, 1885  
                                                       Species Hydraena subina Orchymont, 1944  
                                                       Species Hydraena subinflata Orchymont, 1944  
                                                       Species Hydraena subinoides Orchymont, 1944  
                                                       Species Hydraena subintegra Ganglbauer, 1901  
                                                       Species Hydraena subinura Orchymont, 1944  
                                                       Species Hydraena subirregularis Pic, 1918  
                                                       Species Hydraena subjuncta Orchymont, 1930  
                                                       Species Hydraena sublamina Orchymont, 1945  
                                                       Species Hydraena sublapsa Orchymont, 1945  
                                                       Species Hydraena subsequens Rey, 1886  
                                                       Species Hydraena supersexa Perkins, 2011  
                                                       Species Hydraena supina Perkins, 2011  
                                                       Species Hydraena szechuanensis Pu, 1951  
                                                       Species Hydraena takin Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena takutu Perkins, 2011  
                                                       Species Hydraena tarsotricha Perkins, 2011  
                                                       Species Hydraena tarvisina (Ferro, 1992)  
                                                       Species Hydraena tatii Sáinz-Cantero and Alba-Tercedor, 1989  
                                                       Species Hydraena tauricola Jäch, 1988  
                                                       Species Hydraena taxila Janssens, 1962  
                                                       Species Hydraena tekmanensis Jäch, Skale and Kasapoglu, 2011  
                                                       Species Hydraena tenjikuana Satô, 1979  
                                                       Species Hydraena tenuis (Janssens, 1980)  
                                                       Species Hydraena tenuisella Perkins, 2007  
                                                       Species Hydraena tenuisoror Perkins, 2007  
                                                       Species Hydraena terebrans Jäch, 1992  
                                                       Species Hydraena terralta Perkins, 1980  
                                                       Species Hydraena testacea Curtis, 1830  
                                                       Species Hydraena tetana Perkins, 2011  
                                                       Species Hydraena textila Perkins, 2007  
                                                       Species Hydraena thienemanni Orchymont, 1932  
                                                       Species Hydraena thola Perkins, 2011  
                                                       Species Hydraena tholasoris Perkins, 2011  
                                                       Species Hydraena thumbelina Perkins, 2011  
                                                       Species Hydraena thumbelipes Perkins, 2011  
                                                       Species Hydraena thyene Balfour-Browne, 1958  
                                                       Species Hydraena tiara Perkins, 2014  
                                                       Species Hydraena tibiopaca Perkins, 2011  
                                                       Species Hydraena tobogan Perkins, 2011  
                                                       Species Hydraena torosopala Perkins, 2011  
                                                       Species Hydraena torricellica Perkins, 2011  
                                                       Species Hydraena transvallis Perkins, 2011  
                                                       Species Hydraena trapezoidalis Zwick, 1977  
                                                       Species Hydraena tricantha Zwick, 1977  
                                                       Species Hydraena trichotarsa Perkins, 2011  
                                                       Species Hydraena tricosipes Perkins, 2011  
                                                       Species Hydraena tridigita Perkins, 2011  
                                                       Species Hydraena tridisca Perkins, 2007  
                                                       Species Hydraena triloba Perkins, 2007  
                                                       Species Hydraena trinidensis Perkins, 1980  
                                                       Species Hydraena triparamera Jäch, 1982  
                                                       Species Hydraena tritropis Perkins, 2011  
                                                       Species Hydraena tritutela Perkins, 2011  
                                                       Species Hydraena truncata Rey, 1885  
                                                       Species Hydraena tsushimaensis Jäch and Díaz, 2012  
                                                       Species Hydraena tubuliphallis Jäch, 1982  
                                                       Species Hydraena tucumanica Perkins, 1980  
                                                       Species Hydraena tuolumne Perkins, 1980  
                                                       Species Hydraena turcica Janssens, 1965  
                                                       Species Hydraena turrialba Perkins, 1980  
                                                       Species Hydraena tyrrhena Binaghi, 1961  
                                                       Species Hydraena ulna Perkins, 2011  
                                                       Species Hydraena umbolenta Perkins, 2011  
                                                       Species Hydraena unca Valladares, 1989  
                                                       Species Hydraena undevigintioctogintasisyphos Jäch and Díaz, 2005  
                                                       Species Hydraena undulata Jäch and Díaz, 1998  
                                                       Species Hydraena uniforma Perkins, 2014  
                                                       Species Hydraena unita Perkins, 2011  
                                                       Species Hydraena uzbekistanica Jäch, 1994  
                                                       Species Hydraena vadosa Perkins, 2014  
                                                       Species Hydraena valentini Jäch and Díaz, 2012  
                                                       Species Hydraena vandykei Orchymont, 1923  
                                                       Species Hydraena variopaca Perkins, 2011  
                                                       Species Hydraena vedrasi Orchymont, 1931  
                                                       Species Hydraena vela Perkins, 1980  
                                                       Species Hydraena velvetina Perkins, 2011  
                                                       Species Hydraena venezuela Perkins, 2011  
                                                       Species Hydraena verberans Jäch and Díaz, 2006  
                                                       Species Hydraena verstraeteni Ferro, 1984  
                                                       Species Hydraena victoriae Jäch and Díaz, 1999  
                                                       Species Hydraena vietnamensis (Janssens, 1972)  
                                                       Species Hydraena virginalis Janssens, 1963  
                                                       Species Hydraena vodozi Sainte-Claire Deville, 1908  
                                                       Species Hydraena vulgaris Jäch and Díaz, 2000  
                                                       Species Hydraena waldheimi Jäch, 1987  
                                                       Species Hydraena wangi Jäch and Díaz, 1998  
                                                       Species Hydraena wangmiaoi Jäch and Díaz, 2005  
                                                       Species Hydraena watanabei Jäch and Satô, 1988  
                                                       Species Hydraena wattsi Perkins, 2007  
                                                       Species Hydraena weigeli Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena weiri Perkins, 2007  
                                                       Species Hydraena wencke Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena wewalkai Jäch, 1988  
                                                       Species Hydraena williamsensis Deane, 1931  
                                                       Species Hydraena wittmeri Satô, 1979  
                                                       Species Hydraena wolfi Skale and Jäch in Jäch and Skale, 2009  
                                                       Species Hydraena wrasei Jäch, 1992  
                                                       Species Hydraena xingu Perkins, 2011  
                                                       Species Hydraena yangae Jäch, Díaz and Skale, 2013  
                                                       Species Hydraena yonaguniensis Jäch and Díaz, 2003  
                                                       Species Hydraena yosemitensis Perkins, 1980  
                                                       Species Hydraena yoshitomii Jäch and Díaz, 1999  
                                                       Species Hydraena youngi Perkins, 1980  
                                                       Species Hydraena ypsilon Zwick, 1977  
                                                       Species Hydraena yunnanensis Pu, 1942  
                                                       Species Hydraena zapatina Perkins, 1980  
                                                       Species Hydraena zelandica Ordish, 1984  
                                                       Species Hydraena zetteli Freitag and Jäch, 2007  
                                                       Species Hydraena zezerensis Díaz Pazos and Bilton, 1995  
                                                       Species Hydraena zimbabwensis Perkins, 2014  
                                                       Species Hydraena zwicki Perkins, 2007  

  Reference for:    
  Other Source(s):    
  Source: NODC Taxonomic Code, database (version 8.0)  
  Acquired: 1996   
  Reference for: Hydraena   
  Author(s)/Editor(s): Hansen, Michael  
  Publication Date: 1998   
  Article/Chapter Title:    
  Journal/Book Name, Vol. No.: World Catalogue of Insects, volume 1: Hydraenidae (Coleoptera)   
  Page(s): 168   
  Publisher: Apollo Books   
  Publication Place: Stenstrup, Denmark   
  ISBN/ISSN: 87-88757-27-7   
  Reference for: Hydraena   
  Author(s)/Editor(s): Perkins, Philip D.  
  Publication Date: 2007   
  Article/Chapter Title: A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae)   
  Journal/Book Name, Vol. No.: Zootaxa, issue 1489   
  Page(s): 1-207   
  Publication Place:    
  ISBN/ISSN: 1175-5326   
  Notes: Online edition ISSN is 1175-5334; available at   
  Reference for: Hydraena   

 Geographic Information
  Geographic Division:    



  Comment: The subdivision of the genus Hydraena into subgenera is currently uncertain. For this reason we have decided to leave them out of this database. Comprehensive study of the species groupings is currently under study through molecular analysis (M. Jäch, personal communication)  



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