Mammalia - Carnivora - Ursidae
Alternative spelling: Amphicynodontidae
Full reference: R. H. Tedford, L. G. Barnes, and C. E. Ray. 1994. The early Miocene littoral ursoid carnivoran Kolponomos: Systematics and mode of life. Proceedings of the San Diego Society of Natural History 29:11-32
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
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