Genus: Hydroporus

Diytiscus.

Den største slekten blandt vannkalvene, med 33 arter registrert i Norge.

Kategori	Scientific name	English name
Kingdom	Animalia	Animals
Phylum	Arthropoda	Articulate animals
Klasse	Insecta	Insects
Order	Coleoptera	Biller
Family	Dytiscidae	Vannkalver
Genus	Hydroporus
Species	Hydroporus erythrocephalus
Species	Hydroporus longicornus
Species	Hydroporus memnonius
Species	Hydroporus morio
Species	Hydroporus obscurus
Species	Hydroporus palustris
Species	Hydroporus striola
Species	Hydroporus umbrosus