Hydraena

Hydraena is a genus of minute moss beetles in the family Hydraenidae. There are more than 990 described species in Hydraena. thumb|Hydraena wolfi ==Systematics== There are at least 924 species in the genus Hydraena: Hydraena abbasigili Jäch, 1988 i c g Hydraena abdita Orchymont, 1948 i c g Hydraena abyssinica Régimbart, 1905 i c g Hydraena accurata Orchymont, 1948 i c g Hydraena achaica Jäch, 1995 i c g Hydraena acumena Perkins, 2011 i c g Hydraena adelbertensis Perkins, 2011 i c g Hydraena adrastea Orchymont, 1948 i c g Hydraena aethaliensis Breit, 1917 i c g Hydraena affirmata Perkins, 2007 i c g Hydraena affusa Orchymont, 1936 i c g Hydraena africana Kuwert, 1888 i c g Hydraena akameku Perkins, 2011 i c g Hydraena akbesiana Audisio, De Biase and Jäch, 1993 i c g Hydraena albai Sáinz-Cantero, 1993 i c g Hydraena alberti Balfour-Browne, 1950 i c g Hydraena alcantarana Ienistea, 1985 i c g Hydraena algerina Kaddouri, 1992 i c g Hydraena alia Orchymont, 1934 i c g Hydraena aliciae Jäch and Díaz, 2005 i c g Hydraena allomorpha Lagar and Fresneda, 1990 i c g Hydraena alluaudi Régimbart, 1906 i c g Hydraena alpicola Pretner, 1931 i c g Hydraena altamirensis Díaz Pazos and Garrido Gonzalez, 1993 i c g Hydraena altapapua Perkins, 2011 i c g Hydraena alternata Perkins, 1980 i c g Hydraena alterra Perkins, 1980 i c g Hydraena alticola Skale and Jäch, 2008 i c g Hydraena altiphila Perkins, 2011 i c g Hydraena amazonica Perkins, 2011 i c g Hydraena ambiflagellata Zwick, 1977 i c g Hydraena ambigua Ganglbauer, 1901 i c g Hydraena ambiosina Perkins, 2007 i c g Hydraena ambra Perkins, 2011 i c g Hydraena ambripes Perkins, 2011 i c g Hydraena ambroides Perkins, 2011 i c g Hydraena americana Jäch, 1993 i c g Hydraena amidensis Jäch, 1988 i c g Hydraena ampla Perkins, 2011 i c g Hydraena anaphora Perkins, 1980 i c g Hydraena anatolica Janssens, 1963 i c Hydraena ancylis Perkins, 1980 i c g Hydraena ancyrae Jäch, 1992 i c g Hydraena andalusa Lagar and Fresneda, 1990 i c g Hydraena andreinii Orchymont, 1934 i c g Hydraena angulicollis Notman, 1921 i c g b Hydraena angulosa Mulsant, 1844 i c g Hydraena angustata Sturm, 1836 i c g Hydraena anisonycha Perkins, 1980 i c g Hydraena antaria Perkins, 2007 i c g Hydraena antiatlantica Jäch, Aguilera and Hernando, 1998 i c g Hydraena antiochena Jäch, 1988 i c g Hydraena apertista Perkins, 2011 i c g Hydraena apexa Perkins, 2011 i c g Hydraena appalachicola Perkins, 1980 i c g Hydraena appetita Perkins, 2007 i c g Hydraena aquila Perkins, 2011 i c g Hydraena arabica Balfour-Browne, 1951 i c g Hydraena arachthi Ferro and Jäch, 2000 i c g Hydraena arcta Perkins, 2007 i c g Hydraena arenicola Perkins, 1980 i c g Hydraena argutipes Perkins, 1980 i c g Hydraena ariana Janssens, 1962 i c g Hydraena arizonica Perkins, 1980 i c g Hydraena armata Reitter, 1880 i c g Hydraena armatura Perkins, 2014 i c g Hydraena armeniaca Janssens, 1968 i c g Hydraena armipalpis Jäch and Díaz, 2000 i c g Hydraena armipes Rey, 1886 i c g Hydraena aroensis (Ferro, 1991) i c g Hydraena arunensis Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena ascensa Perkins, 2007 i c g Hydraena assimilis Rey, 1885 i c g Hydraena ateneo Freitag, 2013 i c g Hydraena athertonica Perkins, 2007 i c g Hydraena atrata Desbrochers des Loges, 1891 i c g Hydraena atroscintilla Perkins, 2011 i c g Hydraena attaleiae Ferro, 1984 i c g Hydraena audisioi Jäch, 1992 i c g Hydraena aulaarta Perkins, 2011 i c g Hydraena aurita Jäch, 1988 i c g Hydraena australica Zwick, 1977 i c g Hydraena australula Perkins, 2007 i c g Hydraena austrobesa Perkins, 2011 i c g Hydraena avuncula Jäch, 1988 i c g Hydraena bacchusi Perkins, 2011 i c g Hydraena bactriana Janssens, 1962 i c g Hydraena bakriensis Skale and Jäch, 2011 i c g Hydraena balearica Orchymont, 1930 i c g Hydraena balfourbrownei Bameul, 1986 i c g Hydraena balkei Perkins, 2011 i c g Hydraena balli Orchymont, 1940 i c g Hydraena barbipes Zwick, 1977 i c g Hydraena barricula Perkins, 1980 i c g Hydraena barrosi Orchymont, 1934 i c g Hydraena bedeli Berthélemy, 1992 i c g Hydraena belgica Orchymont, 1930 i c g Hydraena beniensis Perkins, 2011 i c g Hydraena benjaminus Jäch and Díaz, 2006 i c g Hydraena bensae Ganglbauer, 1901 i c g Hydraena bergeri (Janssens, 1972) i c g Hydraena berthelemyana Jäch, Díaz and Dia in Jäch, Dia and Díaz, 2006 i c g Hydraena berytus Jäch, 1986 i c g Hydraena beyarslani Jäch, 1988 i c g Hydraena bicarina Perkins, 2014 i c g Hydraena bicarinova Perkins, 2011 i c g Hydraena bicolorata Jäch, 1997 i c g Hydraena bicuspidata Ganglbauer, 1901 i c g Hydraena bidefensa Perkins, 2007 i c g Hydraena bifunda Perkins, 2011 i c g Hydraena bihamata Champion, 1920 i c g Hydraena biimpressa Perkins, 2007 i c g Hydraena billi Zwick, 1977 i c g Hydraena bilobata Jäch and Díaz, 1998 i c g Hydraena biltoni Jäch and Díaz, 2012 i c g Hydraena bimagua Jäch, 1986 i c g Hydraena birendra Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena biseptosa Perkins, 2014 i c g Hydraena bispinosa Pu, 1951 i c g Hydraena bisulcata Rey, 1884 i c g Hydraena bitruncata Orchymont, 1934 i c g Hydraena bituberculata Perkins, 1980 i c g Hydraena biundulata Perkins, 2011 i c g Hydraena blackburni Zaitzev, 1908 i c g Hydraena bodemeyeri Jäch and Díaz, 2001 i c g Hydraena boetcheri Orchymont, 1932 i c g Hydraena bolivari Orchymont, 1936 i c g Hydraena boliviana Perkins, 2011 i c g Hydraena bononiensis Binaghi, 1960 i c g Hydraena borbonica Fairmaire, 1898 i c g Hydraena bosnica Apfelbeck, 1909 i c g Hydraena brachymera Orchymont, 1936 i c g Hydraena bractea Perkins, 1980 i c g Hydraena bractoides Perkins, 1980 i c g Hydraena brahmin Perkins, 2011 i c g Hydraena breedlovei Perkins, 1980 i c g Hydraena brevis Sharp, 1882 i c g Hydraena britteni Joy, 1907 i c g Hydraena brittoni Zwick, 1977 i c g Hydraena bromleyae Jäch, 1986 i c g Hydraena browni Perkins, 1980 i c g Hydraena bubulla Perkins, 2011 i c g Hydraena bulgarica Breit, 1916 i c g Hydraena buloba Perkins, 2011 i c g Hydraena buquintana Perkins, 2011 i c g Hydraena buschietanni Freitag, 2021 i c g Hydraena buscintilla Perkins, 2011 i c g Hydraena busuanga Freitag and Jäch, 2007 i c g Hydraena calcarifera Janssens, 1959 i c g Hydraena californica Perkins, 1980 i c g Hydraena campbelli Perkins, 1980 i c g Hydraena canakcioglui Janssens, 1965 i c g Hydraena canticacollis Perkins, 1980 i c g Hydraena capacis Perkins, 2007 i c g Hydraena capensis Perkins, 2014 i c g Hydraena capetribensis Perkins, 2007 i c g Hydraena cappadocica Jäch, 1988 i c g Hydraena caprivica Perkins, 2014 i c g Hydraena capta Orchymont, 1936 i c g Hydraena carbonaria Kiesenwetter, 1849 i c g Hydraena carica Jäch, 1988 i c g Hydraena carinocisiva Perkins, 2011 i c g Hydraena carinulata Rey, 1886 i c g Hydraena carmellita Perkins, 2011 i c g Hydraena carniolica Pretner, 1970 i c g Hydraena castanea Deane, 1937 i c g Hydraena castanescens Freitag and Jäch, 2007 i c g Hydraena cata Orchymont, 1936 i c g Hydraena catalonica Fresneda, Aguilera and Hernando, 1994 i c g Hydraena catherinae Bameul and Jäch, 2001 i c g Hydraena caucasica Kuwert, 1888 i c g Hydraena cavifrons Perkins, 2011 i c g Hydraena cephalleniaca Jäch, 1985 i c g Hydraena cervisophila Jäch, 1992 i c g Hydraena challeti Perkins, 2011 i c g Hydraena cheesmanae Perkins, 2011 i c g Hydraena chenae Pu, 1951 i c g Hydraena chersonesica Jäch, Díaz and Przewozny, 2007 i c g Hydraena cherylbarrae Perkins, 2011 i c g Hydraena chiapa Perkins, 1980 i c g Hydraena chiesai Janssens, 1965 i c g Hydraena chifengi Jäch and Díaz, 1999 i c g Hydraena chobauti Guillebeau, 1896 i c g Hydraena christinae Audisio, De Biase and Jäch, 1996 i c g Hydraena christoferi Jäch and Díaz, 2005 i c g Hydraena ciliciensis Jäch, 1988 i c g Hydraena circulata Perkins, 1980 i c g b Hydraena cirrata Champion, 1920 i c g Hydraena clarinis Perkins, 2011 i c g Hydraena claudia Freitag and Jäch, 2007 i c g Hydraena clavicula Perkins, 2014 i c g Hydraena clavigera Zwick, 1977 i c g Hydraena clemens Jäch and Díaz, 2006 i c g Hydraena clinodorsa Perkins, 2011 i c g Hydraena clystera Perkins, 2011 i c g Hydraena cochabamba Perkins, 2011 i c g Hydraena colchica Janssens, 1963 i c g Hydraena colombiana Perkins, 1980 i c g Hydraena colorata Perkins, 2011 i c g Hydraena colymba Perkins, 1980 i c g Hydraena compressipilis Jäch and Díaz, 1998 i c g Hydraena concepcionica Perkins, 2011 i c g Hydraena concinna Orchymont, 1932 i c g Hydraena confluenta Perkins, 2011 i c g Hydraena confusa Pu, 1951 i c g Hydraena connexa Orchymont, 1932 i c g Hydraena converga Perkins, 2007 i c g Hydraena coomani Orchymont, 1932 i c g Hydraena cooperi Balfour-Browne, 1954 i c g Hydraena cooperoides Perkins, 2014 i c g Hydraena copulata Perkins, 2011 i c g Hydraena cordata Schaufuss, 1883 i c g Hydraena cordiformis Jäch and Díaz, 2000 i c g Hydraena cordispina Perkins, 2011 i c g Hydraena corinna Orchymont, 1936 i c g Hydraena cornelli Jäch and Díaz, 1998 i c g Hydraena corrugis Orchymont, 1934 i c g Hydraena coryleti Jäch, 1992 i c g Hydraena costiniceps Perkins, 1980 i c g Hydraena crepidoptera Jäch, 1992 i c g Hydraena cristatigena Jäch and Díaz, 2000 i c g Hydraena croatica Kuwert, 1888 i c g Hydraena cryptostoma Jäch, 1992 i c g Hydraena crystallina Perkins, 1980 i c g Hydraena cubista Perkins, 2007 i c g Hydraena cultrata Perkins, 2007 i c g Hydraena cunicula Perkins, 2011 i c g Hydraena cunninghamensis Perkins, 2007 i c g Hydraena curta Kiesenwetter, 1849 i c g Hydraena curtipalpis Jäch and Díaz, 1998 i c g Hydraena curvipes Jäch and Díaz, 2012 i c g Hydraena curvosa Perkins, 2011 i c g Hydraena cuspidicollis Perkins, 1980 i c g Hydraena cyclops Jäch and Díaz, 2000 i c g Hydraena cygnus Zwick, 1977 i c g Hydraena czernohorskyi Müller, 1911 i c g Hydraena dalmatina Ganglbauer, 1901 i c g Hydraena damascena Pic, 1910 i c g Hydraena dariensis Perkins, 2011 i c g Hydraena darwini Perkins, 2007 i c g Hydraena d-concava Perkins, 2011 i c g Hydraena d-destina Perkins, 1980 i c g Hydraena debeckeri (Janssens, 1972) i c g Hydraena decepta Perkins, 2011 i c g Hydraena decipiens Zwick, 1977 i c g Hydraena decolor Sainte-Claire Deville, 1903 i c g Hydraena decui Spangler, 1980 i c g Hydraena delia Balfour-Browne, 1978 i c g Hydraena deliquesca Perkins, 2007 i c g Hydraena delvasi Delgado and Collantes, 1996 i c g Hydraena densa Fauvel, 1883 i c g Hydraena dentipalpis Reitter, 1888 i c g Hydraena dentipes Germar, 1824 i c g Hydraena devillei Ganglbauer, 1901 i c g Hydraena devincta Orchymont, 1940 i c g Hydraena diadema Perkins, 2011 i c g Hydraena diazi Trizzino, Jäch and Ribera in Trizzino, Jäch, Audisio and Rivera, 2011 i c g Hydraena diffusa Perkins, 2011 i c g Hydraena dilutipes Fairmaire, 1898 i c g Hydraena dimorpha Orchymont, 1922 i c g Hydraena dinarica Freitag & de Vries, 2021 i c g Hydraena dinosaurophila Jäch, 1994 i c g Hydraena discicollis Fairmaire, 1898 i c g Hydraena discreta Ganglbauer, 1904 i c g Hydraena disparamera Perkins, 2007 i c g Hydraena dochula Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena dolichogaster Janssens, 1965 i c g Hydraena dorrigoensis Perkins, 2007 i c g Hydraena draconisaurati Jäch and Díaz, 2005 i c g Hydraena dudgeoni Perkins, 2011 i c g Hydraena duodecimata Perkins, 2014 i c g Hydraena duohamata Perkins, 2011 i c g Hydraena ebriimadli Jäch, 1988 i c g Hydraena ecuadormica Perkins, 2011 i c g Hydraena egoni Jäch, 1986 i c g Hydraena eichleri Orchymont, 1937 i c g Hydraena einsteini Perkins, 2011 i c g Hydraena elephanta Perkins, 2014 i c g Hydraena elisabethae Jäch, 1992 i c g Hydraena eliya Jäch, 1982 i c g Hydraena emarginata Rey, 1885 i c g Hydraena emineae Jäch and Kasapoglu, 2006 i c g Hydraena epeirosi Ferro, 1985 i c g Hydraena errina Orchymont, 1948 i c g Hydraena erythraea Régimbart, 1905 i c g Hydraena eryx Orchymont, 1948 i c g Hydraena esquinita Brojer and Jäch, 2011 i c g Hydraena essentia Perkins, 2011 i c g Hydraena eucnemis Janssens, 1970 i c g Hydraena evanescens Rey, 1884 i c g Hydraena evansi Balfour-Browne, 1945 i c g Hydraena exarata Kiesenwetter, 1866 i c g Hydraena exasperata Orchymont, 1935 i c g Hydraena excisa Kiesenwetter, 1849 i c g Hydraena exhalista Perkins, 2011 i c g Hydraena exilipes Perkins, 1980 i c g Hydraena expedita Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena explanata Pic, 1905 i c g Hydraena extorris Zwick, 1977 i c g Hydraena falcata Jäch, 1992 i c g Hydraena farsensis Skale and Jäch, 2011 i c g Hydraena fasciata Perkins, 2011 i c g Hydraena fascinata Perkins, 2011 i c g Hydraena fasciola Perkins, 2011 i c g Hydraena fasciolata Perkins, 2011 i c g Hydraena fasciopaca Perkins, 2011 i c g Hydraena favulosa Perkins, 2014 i c g Hydraena fenestella Perkins, 2011 i c g Hydraena ferethula Perkins, 2007 i c g Hydraena feryi Skale and Jäch, 2011 i c g Hydraena feuerborni Orchymont, 1932 i c g Hydraena fijiensis Balfour-Browne, 1945 i c g Hydraena filum Sahlberg, 1908 i c g Hydraena finita Orchymont, 1943 i c g Hydraena finki Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena finniganensis Perkins, 2007 i c g Hydraena fiorii Porta, 1899 i c g Hydraena fischeri Schönmann, 1991 i c g Hydraena flagella Perkins, 2011 i c g Hydraena fluvicola (Perkins, 1980) i c g Hydraena foliobba Perkins, 2011 i c g Hydraena fontana Orchymont, 1932 i c g Hydraena fontiscarsavii (Jäch, 1988) i c g Hydraena formosapala Perkins, 2011 i c g Hydraena formula Orchymont, 1932 i c g Hydraena forticollis Perkins, 2007 i c g Hydraena fosterorum Trizzino, Jäch and Ribera in Trizzino, Jäch, Audisio and Rivera, 2011 i c g Hydraena franklyni Deler-Hernández and Delgado, 2012 i c g Hydraena freitagi Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena frenzeli Skale and Jäch, 2008 i c g Hydraena fritzi Jäch, 1992 i c g Hydraena frondsicola (Perkins, 1980) i c g Hydraena funda Perkins, 2011 i c g Hydraena fundacta Perkins, 2011 i c g Hydraena fundaequalis Perkins, 2007 i c g Hydraena fundapta Perkins, 2011 i c g Hydraena fundarca Perkins, 2011 i c g Hydraena fundata Perkins, 2007 i c g Hydraena fundextra Perkins, 2011 i c g Hydraena furthi Jäch, 1982 i c g Hydraena gaditana Lagar and Fresneda, 1990 i c g Hydraena galatica Janssens, 1970 i c g Hydraena galea Perkins, 2011 i c g Hydraena gavarrensis Jäch, Díaz and Martinoy, 2005 i c g Hydraena geminya Perkins, 1980 i c g Hydraena genumorpha Perkins, 2014 i c g Hydraena georgiadesi Orchymont, 1931 i c g Hydraena geraldneuhauseri Jäch and Díaz, 2006 i c g Hydraena germaini Orchymont, 1923 i c g Hydraena glassmani Jäch, 1986 i c g Hydraena gnatella Orchymont, 1945 i c g Hydraena gnatelloides Orchymont, 1945 i c g Hydraena gracilidelphis Trizzino, Valladares, Garrido and Audisio, 2012 i c g Hydraena gracilis Germar, 1824 i c g Hydraena graciloides (Jäch, 1988) i c g Hydraena grandis Reitter, 1885 i c g Hydraena graphica Orchymont, 1931 i c g Hydraena grata Orchymont, 1944 i c g Hydraena gregalis Orchymont, 1944 i c g Hydraena gressa Orchymont, 1944 i c g Hydraena griphus Orchymont, 1944 i c g Hydraena grouvellei Orchymont, 1923 i c g Hydraena grueberi Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena guadelupensis Orchymont, 1923 i c g Hydraena guangxiensis Jäch and Díaz, 2005 i c g Hydraena guatemala Perkins, 1980 i c g Hydraena guentheri Jäch, 1992 i c g Hydraena guilin Jäch and Díaz, 2005 i c g Hydraena gynaephila Jäch, 1997 i c g Hydraena habitiva Perkins, 2014 i c g Hydraena hainzi Jäch, 1988 i c g Hydraena haitensis Perkins, 1980 i c g Hydraena hajeki Skale and Jäch, 2011 i c g Hydraena hamifera Zwick, 1977 i c g Hydraena hansreuteri Jäch and Díaz, 2005 i c g Hydraena hayashii Jäch and Díaz, 2012 i c g Hydraena helena Orchymont, 1929 i c g Hydraena hendrichi Jäch, Díaz and Skale, 2013 i c g Hydraena hernandoi Fresneda and Lagar, 1990 i c g Hydraena herzogestella Perkins, 2011 i c g Hydraena heterogyna Bedel, 1898 i c g Hydraena hiekei Jäch, 1992 i c g Hydraena hillaryi Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena hintoni Perkins, 2011 i c g Hydraena hispanica Ganglbauer, 1901 i c g Hydraena holdhausi Pretner, 1929 i c g Hydraena hornabrooki Perkins, 2011 i c g Hydraena hortensis Jäch and Díaz, 2000 i c g Hydraena hosiwergi Freitag and Jäch, 2007 i c g Hydraena hosseinieorum Bilton and Jäch, 1998 i c g Hydraena huangshanensis Jäch and Díaz, 2005 i c g Hydraena huitongensis Jäch and Díaz, 2005 i c g Hydraena humanica Perkins, 2014 i c g Hydraena hunanensis Pu, 1951 i c g Hydraena hungarica Rey, 1884 i c g Hydraena huonica Perkins, 2011 i c g Hydraena hyalina Perkins, 1980 i c g Hydraena hynesi Zwick, 1977 i c g Hydraena hypipamee Perkins, 2007 i c g Hydraena ibalimi Perkins, 2011 i c g Hydraena iberica Orchymont, 1936 i c g Hydraena idema Perkins, 2011 i c g Hydraena iheya Jäch and Díaz, 1999 i c g Hydraena ilamensis Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena ilica Jäch, 1994 i c g Hydraena imbria Jäch and Díaz, 2001 i c g Hydraena impala Perkins, 2011 i c g Hydraena imperatrix Kniz, 1919 i c g Hydraena impercepta Zwick, 1977 i c g Hydraena impressicollis Fairmaire, 1898 i c g Hydraena inancala Perkins, 2007 i c g Hydraena inapicipalpis Pic, 1918 i c g Hydraena incisiva Perkins, 2011 i c g Hydraena incista Perkins, 2011 i c g Hydraena incurva Orchymont, 1932 i c g Hydraena indiana Jäch, 1994 i c g Hydraena indica Orchymont, 1920 i c g Hydraena infoveola Perkins, 2011 i c g Hydraena ingens (Perkins, 1980) i c g Hydraena inhalista Perkins, 2011 i c g Hydraena injectiva Perkins, 2014 i c g Hydraena innuda Perkins, 2007 i c g Hydraena inopinata Jäch and Díaz, 1998 i c g Hydraena inplacopaca Perkins, 2011 i c g Hydraena insandalia Perkins, 2011 i c g Hydraena insita Orchymont, 1932 i c g Hydraena insolita Orchymont, 1932 i c g Hydraena insularis Orchymont, 1945 i c g Hydraena integra Pretner, 1931 i c g Hydraena intensa Perkins, 2011 i c g Hydraena intermedia Rosenhauer, 1847 i c g Hydraena intraangulata Perkins, 2007 i c g Hydraena inusta Orchymont, 1932 i c g Hydraena invicta Perkins, 2007 i c g Hydraena iriomotensis Jäch and Díaz, 1999 i c g Hydraena isabelae Castro and Herrera, 2001 i c g Hydraena isolinae Jäch and Díaz, 1998 i c g Hydraena ispirensis Kasapoglu, Jäch and Skale, 2010 i c g Hydraena iterata Orchymont, 1948 i c g Hydraena jacobsoni Orchymont, 1932 i c g Hydraena jaechiana (Audisio and De Biase, 1990) i c g Hydraena jaegeri Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena jailensis Breit, 1917 i c g Hydraena janczyki Jäch, 1992 i c g Hydraena janeceki Jäch, 1987 i c g Hydraena janssensi Nilsson, 2001 i c g Hydraena jengi Jäch and Díaz, 1998 i c g Hydraena jilanzhui Jäch and Díaz, 2005 i c g Hydraena jivaro Perkins, 1980 i c g Hydraena johncoltranei Perkins, 2011 i c g Hydraena jubilata Perkins, 2011 i c g Hydraena kadowakii Jäch and Díaz, 2012 i c g Hydraena kakadu Perkins, 2007 i c g Hydraena kamitei Jäch and Díaz, 2012 i c g Hydraena karinkukolae Jäch, 1989 i c g Hydraena karmai Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena kasyi Jäch, 1992 i c g Hydraena kaufmanni Ganglbauer, 1901 i c g Hydraena kellymilleri Perkins, 2011 i c g Hydraena khnzoriani Janssens, 1968 i c g Hydraena kilimandjarensis Régimbart, 1906 i c g Hydraena kitayamai Jäch and Díaz, 2012 i c g Hydraena knischi Orchymont, 1928 i c g Hydraena kocheri Berthélemy, 1992 i c g Hydraena kodadai Freitag and Jäch, 2007 i c g Hydraena koje Perkins, 2011 i c g Hydraena koma Perkins, 2011 i c g Hydraena krasnodarensis Jäch and Díaz, 2006 i c g Hydraena kroumiriana Kaddouri, 1992 i c g Hydraena kucinici Micetic Stankovic and Jäch, 2012 i c g Hydraena kuehnelti Jäch, 1989 i c g Hydraena kurdistanica Jäch, 1988 i c g Hydraena kwangsiensis Pu, 1951 i c g Hydraena labropaca Perkins, 2011 i c g Hydraena lagamba Brojer and Jäch, 2011 i c g Hydraena lapidicola Kiesenwetter, 1849 i c g Hydraena lapissectilis Jäch, 1992 i c g Hydraena larissae Jäch and Díaz, 2000 i c g Hydraena larsoni Perkins, 2007 i c g Hydraena lascrucensis Brojer and Jäch, 2011 i c g Hydraena lassulipes Perkins, 2011 i c g Hydraena latebricola Jäch, 1986 i c g Hydraena latisoror Perkins, 2007 i c g Hydraena lazica Janssens, 1963 i c g Hydraena leechi Perkins, 1980 i c g Hydraena leei Jäch and Díaz, 1998 i c g Hydraena legorskyi Jäch and Brojer, 2012 i c g Hydraena lehmanni Jäch and Díaz, 2005 i c g Hydraena leonhardi Breit, 1916 i c g Hydraena leprieuri Sainte-Claire Deville, 1905 i c g Hydraena levantina Sahlberg, 1908 i c g Hydraena ligulipes Jäch, 1988 i c g Hydraena lilianae Perkins, 2011 i c g Hydraena limbobesa Perkins, 2011 i c g Hydraena limpidicollis Perkins, 1980 i c g Hydraena liriope Orchymont, 1943 i c g Hydraena longicollis Sharp, 1882 i c g Hydraena loripes Perkins, 2011 i c g Hydraena lotti Bilton, 2013 i c g Hydraena lucasi Lagar, 1984 i c g Hydraena lucernae Zwick, 1977 i c g Hydraena ludovicae Orchymont, 1931 i c g Hydraena luminicollis Perkins, 2007 i c g Hydraena luridipennis MacLeay, 1873 i c g Hydraena lusitana (Berthélemy in Berthélemy and Whytton Da Terra, 1977) i c g Hydraena lycia Jäch, 1988 i c g Hydraena macedonica Orchymont, 1931 i c g Hydraena maculicollis Champion, 1920 i c g Hydraena maculopala Perkins, 2011 i c g Hydraena madronensis Castor, García and Ferreras, 2000 i c g Hydraena magna Pu, 1951 i c g Hydraena magnessa Jäch, 1997 i c g Hydraena magnetica Zwick, 1977 i c g Hydraena mahensis Scott, 1913 i c g Hydraena malagricola Jäch and Díaz, 2012 i c g Hydraena malickyi Jäch, 1989 i c g Hydraena malkini Perkins, 1980 i c g Hydraena manabica Perkins, 2011 i c g Hydraena manaslu Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena manfredjaechi Delgado and Soler, 1991 i c g Hydraena manguao Freitag and Jäch, 2007 i c g Hydraena manulea Perkins, 2011 i c g Hydraena manuloides Perkins, 2011 i c g Hydraena marawaka Perkins, 2011 i c g Hydraena marcosae Aguilera, Hernando and Ribera, 1997 i c g Hydraena marginicollis Kiesenwetter, 1849 i c g Hydraena mariannae Jäch, 1992 i c g Hydraena marinae Castro, 2003 i c g Hydraena martensi Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena martinschoepfi Jäch and Díaz, 2005 i c g Hydraena masatakai Jäch and Díaz, 2003 i c g Hydraena maureenae Perkins, 1980 i c g Hydraena mauriciogarciai Perkins, 2011 i c g Hydraena mazamitla Perkins, 1980 i c g Hydraena mecai Millán and Aguilera, 2000 i c g Hydraena melas Dalla Torre, 1877 i c g Hydraena mercuriala Perkins, 2011 i c g Hydraena meschniggi Pretner, 1929 i c g Hydraena metzeni Perkins, 2007 i c g Hydraena mexicana Perkins, 1980 i c g Hydraena mianminica Perkins, 2011 i c g Hydraena michaelbalkei Jäch, Díaz and Skale, 2013 i c g Hydraena mignymixys Perkins, 1980 i c g Hydraena millerorum Perkins, 2007 i c g Hydraena miniretia Perkins, 2007 i c g Hydraena mintrita Perkins, 2011 i c g Hydraena mitchellensis Perkins, 2007 i c g Hydraena miyatakei Satô, 1959 i c g Hydraena modili Jäch, 1988 i c g Hydraena monikae Jäch and Díaz, 2000 i c g Hydraena monscassius Jäch, 1988 i c g Hydraena monstruosipes Ferro, 1986 i c g Hydraena monteithi Perkins, 2007 i c g Hydraena morio Kiesenwetter, 1849 i c g Hydraena motzfeldi Skale and Jäch, 2011 i c g Hydraena mouzaiensis Sainte-Claire Deville, 1909 i c g Hydraena mpumalanga Perkins, 2014 i c g Hydraena muelleri Pretner, 1931 i c g Hydraena muezziginea Jäch, 1988 i c g Hydraena multiloba Perkins, 2011 i c g Hydraena multimurata Perkins, 2014 i c g Hydraena multispina Perkins, 2011 i c g Hydraena mylasae Jäch, 1992 i c g Hydraena namibiensis Perkins, 2014 i c g Hydraena nanocolorata Perkins, 2011 i c g Hydraena nanopala Perkins, 2011 i c g Hydraena nanoscintilla Perkins, 2011 i c g Hydraena natiforma Perkins, 2014 i c g Hydraena neblina Perkins, 2011 i c g Hydraena nelsonmandelai Makhan, 2008 i c g Hydraena neoaccurata Perkins, 2014 i c g Hydraena nevermanni Perkins, 1980 i c g Hydraena newtoni Perkins, 1980 i c g Hydraena nielshaggei Freitag and Jäch, 2007 i c g Hydraena nigra Hatch, 1965 i c g Hydraena nigrita Germar, 1824 i c g Hydraena nike Jäch, 1995 i c g Hydraena nilguenae (Jäch, 1988) i c g Hydraena nitidimenta Perkins, 2011 i c g Hydraena nivalis Jäch, 1992 i c g Hydraena nomenipes Perkins, 2014 i c g Hydraena notsui Satô, 1978 i c g Hydraena novacula Perkins, 2011 i c g Hydraena numidica Sainte-Claire Deville, 1905 i c g Hydraena nurabadensis Skale and Jäch, 2011 i c g Hydraena nuratauensis Jäch, 1994 i c g Hydraena oaxaca Perkins, 1980 i c g Hydraena oblio Perkins, 1980 i c g Hydraena occidentalis Perkins, 1980 i c g Hydraena occitana (Audisio and De Biase, 1995) i c g Hydraena okapa Perkins, 2011 i c g Hydraena okinawensis Jäch and Díaz, 1999 i c g Hydraena olidipastoris Jäch, 1988 i c g Hydraena ollopa Perkins, 2011 i c g Hydraena optica Jäch and Díaz, 2012 i c g Hydraena orchis Jäch and Díaz, 1998 i c g Hydraena orcula Perkins, 1980 i c g Hydraena ordishi Delgado and Palma, 1997 i c g Hydraena orientalis Breit, 1916 i c g Hydraena ortali Jäch, 1986 i c g Hydraena orthosia Jäch, Díaz and Dia in Jäch, Dia and Díaz, 2006 i c g Hydraena otiarca Perkins, 2011 i c g Hydraena ovata Janssens, 1961 i c g Hydraena owenobesa Perkins, 2011 i c g Hydraena oxiana Janssens, 1974 i c g Hydraena ozarkensis Perkins, 1980 i c g Hydraena pachyptera Apfelbeck, 1909 i c g Hydraena pacifica Perkins, 1980 i c g Hydraena pacificica Perkins, 2011 i c g Hydraena paeminosa Perkins, 1980 i c g Hydraena pagaluensis Hernando and Ribera, 2001 i c g Hydraena paganettii Ganglbauer, 1901 i c g Hydraena pajarita Brojer and Jäch, 2011 i c g Hydraena pakistanica Jäch, 1992 i c g Hydraena pala Perkins, 2011 i c g Hydraena palamita Perkins, 2011 i c g Hydraena palawanensis Freitag and Jäch, 2007 i c g Hydraena pallidula Sainte-Claire Deville, 1909 i c g Hydraena palustris Erichson, 1837 i c g Hydraena pamirica Jäch, 1992 i c g Hydraena pamphylia Jäch and Díaz, 2001 i c g Hydraena pangaei Jäch, 1992 i c g Hydraena pantanalensis Perkins, 2011 i c g Hydraena paraguayensis Janssens, 1972 i c g Hydraena parciplumea Perkins, 2007 i c g Hydraena particeps Perkins, 1980 i c g Hydraena parva Zwick, 1977 i c g Hydraena parysatis Janssens, 1981 i c g Hydraena paucistriata Jäch and Díaz, 2000 i c g Hydraena paulmoritz Jäch, Díaz and Skale, 2013 i c g Hydraena pavicula Perkins, 1980 i c g Hydraena paxillipes Perkins, 2011 i c g Hydraena peckorum Perkins, 2011 i c g Hydraena pectenata Perkins, 2011 i c g Hydraena pedroaguilerai Perkins, 2011 i c g Hydraena pegopyga Perkins, 2011 i c g Hydraena pelops Jäch, 1995 i c g Hydraena pennsylvanica Kiesenwetter, 1849 b Hydraena pensylvanica Kiesenwetter, 1849 i c g Hydraena penultimata Perkins, 2011 i c g Hydraena perkinsi Spangler, 1980 i c g Hydraena perlonga Balfour-Browne, 1950 i c g Hydraena perpunctata Perkins, 2011 i c g Hydraena persica Janssens, 1981 i c g Hydraena pertransversa Perkins, 2011 i c g Hydraena peru Perkins, 1980 i c g Hydraena pesici Skale and Jäch, 2011 i c g Hydraena petila Perkins, 1980 i c g Hydraena phainops Perkins, 2011 i c g Hydraena phallerata Orchymont, 1944 i c g Hydraena phallica Orchymont, 1930 i c g Hydraena phassilyi Orchymont, 1931 i c g Hydraena philippi Jäch and Díaz, 2005 i c g Hydraena philyra Orchymont, 1944 i c g Hydraena phoenicia Jäch, Díaz and Dia in Jäch, Dia and Díaz, 2006 i c g Hydraena photogenica Perkins, 2011 i c g Hydraena pici Sainte-Claire Deville, 1905 i c g Hydraena picula Perkins, 2011 i c g Hydraena pilimera Brojer and Jäch, 2011 i c g Hydraena pilipes Zwick, 1977 i c g Hydraena pilulambra Perkins, 2011 i c g Hydraena pindica Janssens, 1965 i c g Hydraena pisciforma Perkins, 2014 i c g Hydraena planata Kiesenwetter, 1849 i c g Hydraena plastica Orchymont, 1943 i c g Hydraena platycnemis Jäch, 1988 i c g Hydraena platynaspis Jäch, 1988 i c g Hydraena platysoma Janssens, 1968 i c g Hydraena plaumanni Orchymont, 1937 i c g Hydraena plumipes Rey, 1886 i c g Hydraena pluralticola Perkins, 2011 i c g Hydraena plurifurcata Jäch and Díaz, 1998 i c g Hydraena polita Kiesenwetter, 1849 i c g Hydraena pontequula Perkins, 1980 i c g Hydraena pontica Janssens, 1963 i c g Hydraena porchi Perkins, 2007 i c g Hydraena porcula Jäch and Díaz, 1998 i c g Hydraena praetermissa Jäch, 1987 i c g Hydraena premordica Perkins, 1980 i c g Hydraena pretneri Chiesa, 1927 i c g Hydraena prieto Perkins, 1980 i c g Hydraena princeps Fauvel, 1903 i c g Hydraena processa Perkins, 2011 i c g Hydraena producta Mulsant and Rey, 1852 i c g Hydraena proesei Skale and Jäch, 2011 i c g Hydraena profunda Perkins, 2014 i c g Hydraena prokini Jäch and Díaz, 2006 i c g Hydraena propria Perkins, 2011 i c g Hydraena prusensis Jäch, 1992 i c g Hydraena pseudocirrata Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena pseudopalawanensis Freitag and Jäch, 2007 i c g Hydraena pseudoriparia Orchymont, 1945 i c g Hydraena puetzi Jäch, 1994 i c g Hydraena pugillista Perkins, 2007 i c g Hydraena pulchella Germar, 1824 i c g Hydraena pulsatrix Perkins, 1980 i c g Hydraena punctata LeConte, 1855 i c g Hydraena puncticollis Sharp, 1882 i c g Hydraena punctilata Perkins, 2011 i c g Hydraena putearius Jäch and Díaz, 2000 i c g Hydraena pygmaea Waterhouse, 1833 i c g Hydraena quadrata (Janssens, 1980) i c g Hydraena quadricollis Wollaston, 1864 i c g Hydraena quadricurvipes Perkins, 1980 i c g Hydraena quadriplumipes Perkins, 2011 i c g Hydraena quechua Perkins, 1980 i c g Hydraena queenslandica Perkins, 2007 i c g Hydraena quetiae Castro, 2000 i c g Hydraena quilisi Lagar, Fresneda and Fernando, 1987 i c g Hydraena quintana Perkins, 2011 i c g Hydraena ramuensis Perkins, 2011 i c g Hydraena ramuquintana Perez, 2011 i c g Hydraena receptiva Perkins, 2011 i c g Hydraena reflectiva Perkins, 2014 i c g Hydraena regimbarti Zaitzev, 1908 i c g Hydraena remulipes Perkins, 2011 i c g Hydraena reticulata Zwick, 1977 i c g Hydraena reticuloides Perkins, 2007 i c g Hydraena reticulositis Perkins, 2007 i c g Hydraena revelovela Perkins, 2007 i c g Hydraena reverberata Perkins, 2011 i c g Hydraena reyi Kuwert, 1888 i c g Hydraena rhinoceros (Janssens, 1972) i c g Hydraena rhodia Jäch, 1985 i c g Hydraena riberai Jäch, Aguilera and Hernando, 1998 i c g Hydraena richardimbi Jäch, 1992 i c g Hydraena rigua Orchymont, 1931 i c g Hydraena ripaeaureae (Janssens, 1972) i c g Hydraena riparia Kugelann, 1794 i c g Hydraena rivularis Guillebeau, 1896 i c g Hydraena robusta Zwick, 1977 i c g Hydraena rosannae Audisio, Trizzino and De Biase in Audisio, Trizzino, De Biase, Mancini and Antonini, 2009 i c g Hydraena rudallensis Blackburn, 1896 i c g Hydraena rufipennis Boscá Berga, 1932 i c g Hydraena rufipes Curtis, 1830 i c g Hydraena rugosa Mulsant, 1844 i c g Hydraena ruinosa Zwick, 1977 i c g Hydraena rukiyeae Kasapoglu, Jäch and Skale, 2010 i c g Hydraena sabella Perkins, 1980 i c g Hydraena saga Orchymont, 1930 i c g Hydraena sagatai Perkins, 2011 i c g Hydraena sahlbergi Orchymont, 1923 i c g Hydraena saluta Perkins, 2011 i c g Hydraena samia Jäch, 1986 i c g Hydraena samnitica Knisch, 1924 i c g Hydraena sanagergelyae Brojer and Jäch, 2011 i c g Hydraena sanfilippoi (Audisio and De Biase, 1995) i c g Hydraena sappho Janssens, 1965 i c g Hydraena sardoa Binaghi, 1961 i c g Hydraena satoi Jäch and Díaz, 1999 i c g Hydraena sautakei Jäch and Díaz, 1999 i c g Hydraena sauteri Orchymont, 1913 i c g Hydraena scabra Orchymont, 1925 i c g Hydraena scabrosa Orchymont, 1931 i c g Hydraena schawalleri Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena schilfii Jäch, 1988 i c g Hydraena schillhammeri Jäch, 1988 i c g Hydraena schmidi Jäch and Díaz, 2001 i c g Hydraena schoedli Jäch, 1992 i c g Hydraena schoenmanni Jäch, 1988 i c g Hydraena schubertorum Jäch and Díaz, 2001 i c g Hydraena schuelkei Jäch, 1992 i c g Hydraena schuleri Ganglbauer, 1901 i c g Hydraena scintilla Perkins, 1980 i c g Hydraena scintillabella Perkins, 1980 i c g Hydraena scintillamima Perkins, 2011 i c g Hydraena scintillapicta Perkins, 2011 i c g Hydraena scintillarca Perkins, 2011 i c g Hydraena scintillutea Perkins, 1980 i c g Hydraena scitula Orchymont, 1943 i c g Hydraena scolops Perkins, 1980 i c g Hydraena scopula Perkins, 1980 i c g Hydraena scythica Janssens, 1974 i c g Hydraena sebastiani Perkins, 2014 i c g Hydraena sepikramuensis Perkins, 2011 i c g Hydraena septemlacuum Jäch, 1992 i c g Hydraena serpentina Jäch, 1988 i c g Hydraena serricollis Wollaston, 1864 i c g Hydraena servilia Orchymont, 1936 i c g Hydraena sexarcuata Perkins, 2011 i c g Hydraena sexsuprema Perkins, 2011 i c g Hydraena sharmai Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena sharpi Rey, 1886 i c g Hydraena shorti Perkins, 2011 i c g Hydraena sicula Kiesenwetter, 1849 i c g Hydraena sidon Jäch, Díaz and Dia in Jäch, Dia and Díaz, 2006 i c g Hydraena sierra Perkins, 1980 i c g Hydraena similis Orchymont, 1930 i c g Hydraena simonidea Orchymont, 1931 i c g Hydraena simplicicollis Blackburn, 1896 i c g Hydraena simplipes Zwick, 1977 i c g Hydraena singaporensis Jäch, Díaz and Skale, 2013 i c g Hydraena sinope Jäch, 1992 i c g Hydraena smyrnensis Sahlberg, 1908 i c g Hydraena socius Jäch and Díaz, 1999 i c g Hydraena solarii Pretner, 1930 i c g Hydraena solodovnikovi Jäch and Díaz, 2006 i c g Hydraena sordida Sharp, 1882 i c g Hydraena spangleri Perkins, 1980 i c g Hydraena spatula Perkins, 2011 i c g Hydraena speciosa Orchymont, 1944 i c g Hydraena spinipes Baudi, 1882 i c g Hydraena spinissima Perkins, 2007 i c g Hydraena spinobesa Perkins, 2011 i c g Hydraena splecoma Perkins, 1980 i c g Hydraena squalida Orchymont, 1932 i c g Hydraena stefani Jäch and Díaz, 2005 i c g Hydraena steineri Perkins, 2011 i c g Hydraena stellula Perkins, 2011 i c g Hydraena storeyi Perkins, 2007 i c g Hydraena striolata Perkins, 2011 i c g Hydraena stussineri Kuwert, 1888 i c g Hydraena subacuminata Rey, 1884 i c g Hydraena subgrandis Jäch, 1988 i c g Hydraena subimpressa Rey, 1885 i c g Hydraena subina Orchymont, 1944 i c g Hydraena subinflata Orchymont, 1944 i c g Hydraena subinoides Orchymont, 1944 i c g Hydraena subintegra Ganglbauer, 1901 i c g Hydraena subinura Orchymont, 1944 i c g Hydraena subirregularis Pic, 1918 i c g Hydraena subjuncta Orchymont, 1930 i c g Hydraena sublamina Orchymont, 1945 i c g Hydraena sublapsa Orchymont, 1945 i c g Hydraena subsequens Rey, 1886 i c g Hydraena supersexa Perkins, 2011 i c g Hydraena supina Perkins, 2011 i c g Hydraena szechuanensis Pu, 1951 i c g Hydraena takin Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena takutu Perkins, 2011 i c g Hydraena tarsotricha Perkins, 2011 i c g Hydraena tarvisina (Ferro, 1992) i c g Hydraena tatii Sáinz-Cantero and Alba-Tercedor, 1989 i c g Hydraena tauricola Jäch, 1988 i c g Hydraena taxila Janssens, 1962 i c g Hydraena tekmanensis Jäch, Skale and Kasapoglu, 2011 i c g Hydraena tenjikuana Satô, 1979 i c g Hydraena tenuis (Janssens, 1980) i c g Hydraena tenuisella Perkins, 2007 i c g Hydraena tenuisoror Perkins, 2007 i c g Hydraena terebrans Jäch, 1992 i c g Hydraena terralta Perkins, 1980 i c g Hydraena testacea Curtis, 1830 i c g Hydraena tetana Perkins, 2011 i c g Hydraena textila Perkins, 2007 i c g Hydraena thienemanni Orchymont, 1932 i c g Hydraena thola Perkins, 2011 i c g Hydraena tholasoris Perkins, 2011 i c g Hydraena thumbelina Perkins, 2011 i c g Hydraena thumbelipes Perkins, 2011 i c g Hydraena thyene Balfour-Browne, 1958 i c g Hydraena tiara Perkins, 2014 i c g Hydraena tibiopaca Perkins, 2011 i c g Hydraena tobogan Perkins, 2011 i c g Hydraena torosopala Perkins, 2011 i c g Hydraena torricellica Perkins, 2011 i c g Hydraena transvallis Perkins, 2011 i c g Hydraena trapezoidalis Zwick, 1977 i c g Hydraena tricantha Zwick, 1977 i c g Hydraena trichotarsa Perkins, 2011 i c g Hydraena tricosipes Perkins, 2011 i c g Hydraena tridigita Perkins, 2011 i c g Hydraena tridisca Perkins, 2007 i c g Hydraena triloba Perkins, 2007 i c g Hydraena trinidensis Perkins, 1980 i c g Hydraena triparamera Jäch, 1982 i c g Hydraena tritropis Perkins, 2011 i c g Hydraena tritutela Perkins, 2011 i c g Hydraena truncata Rey, 1885 i c g Hydraena tsushimaensis Jäch and Díaz, 2012 i c g Hydraena tubuliphallis Jäch, 1982 i c g Hydraena tucumanica Perkins, 1980 i c g Hydraena tuolumne Perkins, 1980 i c g Hydraena turcica Janssens, 1965 i c g Hydraena turrialba Perkins, 1980 i c g Hydraena tyrrhena Binaghi, 1961 i c g Hydraena ulna Perkins, 2011 i c g Hydraena umbolenta Perkins, 2011 i c g Hydraena unca Valladares, 1989 i c g Hydraena undevigintioctogintasisyphos Jäch and Díaz, 2005 i c g Hydraena undulata Jäch and Díaz, 1998 i c g Hydraena uniforma Perkins, 2014 i c g Hydraena unita Perkins, 2011 i c g Hydraena uzbekistanica Jäch, 1994 i c g Hydraena vadosa Perkins, 2014 i c g Hydraena valentini Jäch and Díaz, 2012 i c g Hydraena vandykei Orchymont, 1923 i c g Hydraena variopaca Perkins, 2011 i c g Hydraena vedrasi Orchymont, 1931 i c g Hydraena vela Perkins, 1980 i c g Hydraena velvetina Perkins, 2011 i c g Hydraena venezuela Perkins, 2011 i c g Hydraena verberans Jäch and Díaz, 2006 i c g Hydraena verstraeteni Ferro, 1984 i c g Hydraena victoriae Jäch and Díaz, 1999 i c g Hydraena vietnamensis (Janssens, 1972) i c g Hydraena virginalis Janssens, 1963 i c g Hydraena vodozi Sainte-Claire Deville, 1908 i c g Hydraena vulgaris Jäch and Díaz, 2000 i c g Hydraena waldheimi Jäch, 1987 i c g Hydraena wangi Jäch and Díaz, 1998 i c g Hydraena wangmiaoi Jäch and Díaz, 2005 i c g Hydraena watanabei Jäch and Satô, 1988 i c g Hydraena wattsi Perkins, 2007 i c g Hydraena weigeli Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena weiri Perkins, 2007 i c g Hydraena wencke Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena wewalkai Jäch, 1988 i c g Hydraena williamsensis Deane, 1931 i c g Hydraena wittmeri Satô, 1979 i c g Hydraena wolfi Skale and Jäch in Jäch and Skale, 2009 i c g Hydraena wrasei Jäch, 1992 i c g Hydraena xingu Perkins, 2011 i c g Hydraena yangae Jäch, Díaz and Skale, 2013 i c g Hydraena yonaguniensis Jäch and Díaz, 2003 i c g Hydraena yosemitensis Perkins, 1980 i c g Hydraena yoshitomii Jäch and Díaz, 1999 i c g Hydraena youngi Perkins, 1980 i c g Hydraena ypsilon Zwick, 1977 i c g Hydraena yunnanensis Pu, 1942 i c g Hydraena zapatina Perkins, 1980 i c g Hydraena zelandica Ordish, 1984 i c g Hydraena zetteli Freitag and Jäch, 2007 i c g Hydraena zezerensis Díaz Pazos and Bilton, 1995 i c g Hydraena zimbabwensis Perkins, 2014 i c g Hydraena zwicki Perkins, 2007 i c g

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