Hydrous Dahl 1775 (water scavenger beetle)
Insecta - Coleoptera - Hydrophilidae
Parent taxon: Hydrophilidae according to J. F. Zhang 1989
Sister taxa: Anacaena, Berosini, Cercyon, Creniphilites, Cretohelophorus, Cretosperchus, Enochrus, Epimetopinae, Georissinae, Helochares, Helophorinae, Horelophinae, Hydrochinae, Hydrochus, Hydrophilinae, Laccobiini, Laccobius, Leptobrochus, Litobrochus, Mesobrochus, Mesydra, Ochthebius, Paladicella, Paraspercheus, Penitus, Philhydrus, Philydrus, Prospercheus, Spercheinae, Sphaeridiinae, Tropisternus, Escheria protogaeae
Subtaxa: Hydrous ebeninus, Hydrous pergrandis
Ecology: