Mammalia - Theriamorpha - Periptychidae
Parent taxon: Bulbulodentata according to J. D. Archibald 1998
See also Ameghino 1897, Archibald et al. 1983, Carroll 1988, Chow et al. 1977, Cope 1889, Flower and Lydekker 1891, Gregory 1910, Hay 1902, Jaekel 1911, Kielan-Jaworowska et al. 2004, McKenna and Honey 2008 and Zhang et al. 1979
Sister taxa: none
Subtaxa: Alticonus Ampliconus Anisonchinae Anisonchus Auraria Beornus Conacodon Conacodontinae Escatepos Goleroconus Hemithlaeus Miniconus Mithrandir Oxyacodon Paleoungulatum Periptychinae Tinuviel
Type: Periptychus
Ecology: ground dwelling herbivore
Distribution:
• Paleocene of Canada (3: Alberta, Saskatchewan collections), China (2), United States (194: California, Colorado, Louisiana, Montana, New Mexico, North Dakota, Texas, Utah, Wyoming)
• Cretaceous of United States (1: Montana), Uzbekistan (1)
Total: 201 collections including 314 occurrences