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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Arthropoda (arthropods)
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Order Coleoptera
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Superfamily Hydrophiloidea
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Genus Agna
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Genus Ametor
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Genus Anacaena
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Genus Berosus
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Genus Cercyon
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Genus Chaetarthria
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Genus Chasmogenus
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Genus Coelofletium
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Genus Coelostoma
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Genus Crenitis
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Genus Cryptopleurum
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Genus Cyclotypus
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Genus Cycrillum
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Genus Cymbiodyta
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Genus Dactylosternum
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Genus Deltostethus
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Genus Derallus
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Genus Enochrus
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Genus Helobata
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Genus Helochares
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Genus Helocombus
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Genus Hemiosus
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Genus Heteryon
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Genus Horelophopsis
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Genus Horelophus
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Genus Hydramara
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Genus Hydrobiomorpha
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Genus Hydrobius
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Genus Hydrocassis
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Genus Hydrochara
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Genus Hydrophilus
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Genus Laccobius
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Genus Limnoxenus
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Genus Megasternum
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Genus Nitiduloides
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Genus Noteropagus
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Genus Omicrus
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Genus Oocyclus
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Genus Oosternum
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Genus Paracymus
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Genus Paraoosternum
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Genus Pelosoma
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Genus Phaenonotum
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Genus Phaenostoma
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Genus Sperchopsis
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Genus Sphaeridium
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Genus Tectosternum
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Genus Tropisternus
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