Mammalia - Carnivora - Ursidae
Alternative spelling: Amphicynodontidae
Full reference: G. G. Simpson. 1945. The principles of classification and a classification of mammals. Bulletin of the American Museum of Natural History 85:1-350
Parent taxon: Ursidae according to R. M. Hunt 1998
See also Bonis et al. 2019, de Bonis et al. 2019 and Tedford et al. 1994
Sister taxa: Agriotheriinae, Ailuropodinae, Eoarctos, Harpaleocyon, Hemicyoninae, Metarctos, Myadina, Phoberocyoninae, Proarctotherium, Taxina, Tremarctinae, Ursinae, Ursulus
Subtaxa: Amphicynodon Drassonax Kolponomos Pachycynodon Parictis Proplesictis Wangictis
Ecology: ground dwelling herbivore-carnivore
Distribution:
• Miocene of Hungary (1 collection), United States (3: Alaska, Oregon, Washington)
• Oligocene of China (2), France (11), Germany (2), Mongolia (5), United States (2: Colorado, Wyoming)
• Eocene of Canada (1: Saskatchewan), United States (17: Montana, Nebraska, South Dakota, Wyoming)
Total: 44 collections including 60 occurrences