Insecta - Coleoptera - Helophoridae
Alternative spellings: Helophorida, Helophorina, Helophorinae
Full reference: W. E. Leach. 1815. Entomology. The Edinburgh Encyclopaedia 9:57-172
Parent taxon: Hydrophiloidea according to C. Y. Cai et al. 2022
See also Bouchard et al. 2011, Lawrence and Newton 1995, Sahlberg 1880 and Short and Fikáček 2013
Sister taxa: Cretotaenia, Epimetopidae, Georissidae, Hydrochidae, Hydrophilidae, Hydrophilopsia, Laetopsia, Sinosperchopsis, Spercheidae
Subtaxa: Helophorus
Distribution:
• Quaternary of Canada (1: British Columbia collection), Germany (1), Greenland (3), the Russian Federation (9), Ukraine (2), the United Kingdom (11), United States (28: Alaska, Colorado, Pennsylvania, Washington)
• Miocene of the Russian Federation (2), United States (1: Alaska)
• Cretaceous of China (1), the Russian Federation (5)
• Jurassic of Mongolia (3), the Russian Federation (7)
Total: 74 collections including 108 occurrences