Osteichthyes - Acipenseriformes - Polyodontidae
Parent taxon: Acipenseriformes according to R. Betancur et al. 2013
See also Bryant 1989, Estes and Berberian 1970, Grande and Bemis 1996, Grande and Hilton 2006, Grande et al. 2002, Hay 1902, Jordan 1963, Nelson et al. 2016 and Woodward 1895
Sister taxa: Acipenseridae, Acipenseriodei, Acipenseristomi, Chondrosteoidei, Eochondrosteus, Errolichthyidae, Saurichthidae
Subtaxa: Hesperopsephurus Pholidurus Protopsephurinae Psephuroides
Type: Polyodon
Ecology: nektobenthic carnivore
Distribution:
• Paleocene of United States (1: Montana collection)
• Cretaceous of Canada (24: Alberta, Saskatchewan), China (3), the United Kingdom (1), United States (6: Montana, New Mexico, Wyoming), Uzbekistan (2)
Total: 37 collections including 38 occurrences