Tribe Hygrotini Portevin 1929 (predaceous diving beetle)
Insecta - Coleoptera - Dytiscidae
Parent taxon: Hydroporinae according to P. Bouchard et al. 2011
See also Nilsson 2001
Sister taxa: Bidessini, Glessaria, Hydroporini, Hyphydrini, Methlini, Procoelambus, Schistomerini, Vatellini
Type: Hygrotus
Ecology:
Distribution:
• Quaternary of Canada (3: Ontario collections), Greenland (1), the Russian Federation (1), Ukraine (1), the United Kingdom (3), United States (1: Washington)
• Eocene of the United Kingdom (1), United States (3: Colorado)
Total: 14 collections including 21 occurrences