Genus: Hygrotus
9 arter i to underslekter er registrert i Norge.
Systematics :
| Kingdom | Animals (Animalia) | |||||||
| Phylum | Articulate animals (Arthropoda) | |||||||
| Klasse | Insects (Insecta) | |||||||
| Order | Biller (Coleoptera) | |||||||
| Family | Vannkalver (Dytiscidae) | |||||||
| Genus | Hygrotus | |||||||
| Subgenus | Coelambus | |||||||
| Species | Coelambus novemlineatus | |||||||
| Species | Hygrotus inaequalis | |||||||
| Species | Hygrotus quinquelineatus | |||||||
| Species | Hygrotus versicolor | |||||||
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