Full reference: O. C. Marsh. 1872. Communication on the discovery of new Rocky Mountain fossils. Proceedings of the American Philosophical Society 12:578-579
Parent taxon: Uintatheriamorpha according to R. M. Schoch and S. G. Lucas 1985
See also Carroll 1988, Cope 1875, Hay 1902 and McKenna 1975
Sister taxa: none
Subtaxa: Gobiatheriidae Prodinoceratidae Uintatheriidae
Ecology: ground dwelling herbivore
Distribution:
• Eocene of China (13 collections), Kazakhstan (1), Kyrgyzstan (2), United States (56: California, Colorado, Texas, Utah, Wyoming)
• Clarkforkian of United States (45: Colorado, Wyoming)
• Cf1 of United States (1: Wyoming)
• Cf2 of United States (2: Wyoming)
• Cf3 of United States (1: Wyoming)
• Paleocene of China (6), Mongolia (4), United States (18: Wyoming)
Total: 149 collections including 161 occurrences