Mammalia - Rodentia - Allomyidae
Parent taxon: Rodentia according to O. C. Marsh 1877
See also Hay 1902 and McKenna and Bell 1997
Sister taxa: Alagomyidae, Allactagidae, Anomalomyidae, Anomaluroidea, Aplodontoidea, Archetypomyidae, Callodontomys, Castorimorpha, Cavina, Cercolabidae, Conilurus, Ctenohystrica, Cylindrodontidae, Dolosimus, Downsimys, Echinomyidae, Ectropomys, Entoptychidae, Epeiromys, Eryomyidae, Eryomyina, Florentiamyidae, Gliroidea, Homocentrus, Hystricognatha, Ischyromyidae, Ischyromyiformes, Ivanantonia, Megacricetodontidae, Muriformia, Mylagaulidae, Myodonta, Myomorpha, Pairomys, Paramyidae, Petauristidae, Pipestoneomyidae, Protrogomorpha, Pseudomys, Quercymys, Remyidae, Sciurognathi, Sciuroidea, Sciuromorpha, Siphneidae, Taeniodus, Theridomyoidea, Yuomyidae, Zamoramys, Zelomyidae
Subtaxa: Allomys Alwoodia Downsimus Haplomys Parallomys Rudiomys Spurimus
Ecology: ground dwelling herbivore
Distribution:
• Miocene of United States (1: Oregon collection)
• Harrisonian of United States (6: Nebraska)
• Arikareean of United States (5: Montana, Nebraska, Oregon, Wyoming)
• Oligocene of Canada (2: Saskatchewan), China (1), United States (21: Nebraska, Oregon, South Dakota)
• Eocene to Oligocene of United States (1: Nebraska)
• Eocene of United States (6: Wyoming)
Total: 43 collections including 51 occurrences