†family Simimyidae Wood 1980 (rodent)
Mammalia - Rodentia - Simimyidae
Parent taxon: Dipodoidea according to R. L. Carroll 1988
Sister taxa: Dipodidae, Sminthidae, Zapodidae
Subtaxa: Simimys
Ecology: ground dwelling herbivore
Distribution:
• Eocene of United States (41: California, Nebraska, Texas, Utah collections)
Total: 41 collections including 42 occurrences