†family Eutypomyidae Miller and Gidley 1918 (rodent)
Mammalia - Rodentia - Eutypomyidae
Parent taxon: Castoroidea according to C. Montgelard et al. 2002
See also Carroll 1988, Johnson 1966, Korth et al. 2022 and Wood 1958
Sister taxon: Castoridae
Subtaxa: Allotypomys Eutypomys Janimus Microeutypomys
Ecology: ground dwelling herbivore
Distribution:
• Arikareean of United States (3: Montana collections)
• Oligocene of Canada (2: Saskatchewan), United States (15: Florida, Nebraska, North Dakota, Oregon, South Dakota)
• Eocene to Oligocene of United States (1: Nebraska)
• Eocene of Canada (7: Saskatchewan), United States (19: Colorado, Montana, Nebraska, North Dakota, South Dakota, Texas, Utah, Wyoming)
Total: 47 collections including 50 occurrences