Hydrophiloidea Latreille, 1802
Acaryon Hebauer, 2003
Aculomicrus Smetana, 1975
Adolopus Sharp, 1884
Agna Smetana, 1978
Agraphydrus Régimbart, 1903
Allocotocerus Kraatz, 1883
Ametor Semenow, 1900
Amphibolus Waterhouse, 1833
Amphiops Erichson, 1843
Anacaena Thomson, 1859
Anchialus Thomson, 1859
Armostus Sharp, 1890
Aschnaia Makhan, 2007
Australocyon Hansen, 1990
Badioglobus Short, 2004
Berosus Leach, 1817
Bolbonotum Hansen, 1999
Borborophorus Hansen, 1990
Cenebriophilus Hansen, 1990
Cercyodes Broun, 1886
Cercyon Leach, 1817
Ceronocyton Hansen, 1990
Cetiocyon Hansen, 1990
Chaetarthria Stephens, 1833
Chasmogenus Sharp, 1882
Chledocyon Hansen, 1990
Coelofletium Orchymont, 1925
Coelostoma Brullé, 1835
Coelostomopsis Hansen, 1990
Compsolaccobius Ganglbauer, 1904
Crenitis Bedel, 1881
Crepidelochares Ganglbauer, 1904
Cryptopleurum Mulsant, 1844
Cybocephalus Motschoulsky, 1845
Cyclotypus Sharp, 1882
Cycrillum Knisch, 1921
Cyloma Sharp, 1872
Cylomissus Broun, 1903
Cymbiodyta Bedel, 1881
Cyphelophorus Seidlitz, 1888
Cyphostethus d'Orchymont, 1919
Dactylosternum Wollaston, 1854
Deltostethus Sharp, 1882
Derallus Sharp, 1882
Dibolocelus Bedel, 1892
Dicyrtocercyon Ganglbauer, 1904
Emmidolium d'Orchymont, 1937
Empleurus Hope, 1838
Enigmata Hansen, 1999
Enochrella Hansen, 1999
Enochrus Thomson, 1859
Ercycodes Hansen, 1990
Eurygmus Hansen, 1990
Eutrichelophorus Sharp, 1915
Exydrus Broun, 1886
Farana Knisch, 1922
Gentilina Hebauer, 2003
Georissus Latreille, 1809
Gephelophorus Sharp, 1915
Hebauerina Gentili, 2002
Helobata Bergroth, 1888
Helochares Mulsant, 1844
Helocombus Horn, 1890
Hemiosus Sharp, 1882
Hemisphaera Pandelle, 1875
Heteryon Sharp, 1882
Homostethus d'Orchymont, 1921
Horelophopsis Hansen, 1997
Horelophus Orchymont, 1913
Hugoscottia Knisch, 1922
Hybogralius d'Orchymont, 1942
Hydatotrephis MacLeay, 1871
Hydatotrophis d'Orchymont, 1919
Hydramara Knisch, 1925
Hydrobaticus MacLeay, 1871
Hydrobiomorpha Blackburn, 1888
Hydrobius Leach, 1815
Hydrocassis Fairmaire, 1878
Hydrochara Berthold, 1827
Hydrophilus Geoffroy, 1762
Hydrostygnus Sharp, 1884
Hydrotrephis Régimbart, 1908
Hydrous Leach, 1815
Hydroxenus Wollaston, 1867
Kyphohelophorus Kuwert, 1886
Laccobius Erichson, 1837
Lihelophorus Zaitzev, 1908
Limnoxenus Motschulsky, 1853
Lumetus Zaitzev, 1908
Megagraphydrus Hansen, 1999
Megasternum Mulsant, 1844
Methydrus Rey, 1885
Microlaccobius Gentili, 1972
Morastus d'Orchymont, 1926
Motonerus Hansen, 1989
Nannomicrus Bameul, 1990
Nitidulodes Sharp, 1882
Nitiduloides Sharp, 1882
Noteropagus Orchymont, 1919
Notoberosus Blackburn, 1895
Notocercyon Blackburn, 1898
Notohydrus Balfour-Browne, 1939
Omicrus Sharp, 1879
Omniops Perkins & Short, 2004
Oocyclus Sharp, 1882
Oosternum Sharp, 1882
Ophthalmocyclus Komarek, 2003
Orphelophorus d'Orchymont, 1926
Pachysternum Motschulsky, 1863
Paracercyon Seidlitz, 1888
Paracycreon d'Orchymont, 1942
Paracymus Thomson, 1867
Paranacaena Blackburn, 1888
Paraoosternum Scott, 1913
Parastromus Balfour-Browne, 1948
Paroosternum Scott, 1913
Pelocyon Balfour-Browne, 1950
Pelosoma Mulsant, 1844
Pelthydrus d'Orchymont, 1919
Peltocercyon d'Orchymont, 1925
Peratogonus Sharp, 1884
Petasopsis Hansen, 1990
Phaenonotum Sharp, 1882
Phaenostoma Orchymont, 1937
Phelea Hansen, 1999
Philhydrus Brullé, 1835
Philydrus Solier, 1834
Pilocnema Hansen, 1990
Platycyon Hansen, 1999
Pleurhomus Sharp, 1883
Pristoternus d'Orchymont, 1936
Protosternum Sharp, 1890
Psalitrus d'Orchymont, 1919
Pseudohydrobius Blackburn, 1898
Pseudoosternum Hansen, 1990
Quadriops Hansen, 1999
Regimbartia Zaitzev, 1908
Rhopalhelophorus Kuwert, 1890
Rhopalohelophorus Kuwert, 1886
Rishihydroius Makhan, 2001
Rygmodus White, 1846
Rygmostralia d'Orchymont, 1933
Sacosternum Hansen, 1989
Saphydrus Sharp, 1884
Scoliopsis d'Orchymont, 1919
Sindolus Sharp, 1882
Sperchopsis LeConte, 1862
Sphaeridium Fabricius, 1775
Stagnicola Montrouzier, 1860
Sternolophus Solier, 1834
Stethoxus Solier, 1834
Tectosternum Balfour-Browne, 1958
Thysanarthria d'Orchymont, 1926
Tobochares Short & Garcia, 2007
Toma Hansen, 1999
Tormissus Broun, 1893
Tormus Sharp, 1884
Trichelophorus Kuwert, 1890
Trichohelophorus Kuwert, 1888
Trichopoda Brullé, 1835
Tropisternis Solier, 1834
Tropisternus Solier, 1834
Wollastonia Machado, 1984