Tribe Megasternini Mulsant 1844 (water scavenger beetle)
Insecta - Coleoptera - Hydrophilidae
Parent taxon: Sphaeridiinae according to R. P. Webster 2016
See also Bouchard et al. 2011 and Short and Fikáček 2013
Sister taxa: none
Subtaxa: Cercyon Cryptopleurum Megasternum
Type: Megasternum
Ecology:
Distribution:
• Quaternary of Greenland (1 collection), the Russian Federation (2), the United Kingdom (18), United States (3: Washington, Wisconsin)
• Eocene of Canada (1: British Columbia)
Total: 25 collections including 43 occurrences