Mammalia - Artiodactyla - Merycoidodontidae
Parent taxon: Merycoidodontidae according to M. S. Stevens and J. B. Stevens 2007
See also McKenna and Bell 1997, Schultz and Falkenbach 1968 and Stevens and Stevens 1996
Sister taxa: Aclistomycterinae, Brachycrurinae, Eporeodontinae, Merychyinae, Merychyus pariogonus, Merycochoerinae, Merycoidodontinae, Miniochoerinae, Oreonetinae, Phenacocoelinae, Promerycochoerinae, Ticholeptinae, Ustatochoerinae, Diplotremus
Subtaxa: Leptauchenia Leptaucheniini Limnenetes Sespia Sespiini
Ecology: ground dwelling herbivore
Distribution:
• Miocene of United States (1: South Dakota collection)
• Harrisonian of United States (1: Nebraska)
• Arikareean of United States (75: California, Colorado, Montana, Nebraska, South Dakota, Wyoming)
• Oligocene of Canada (1: Saskatchewan), United States (115: Colorado, Nebraska, North Dakota, South Dakota, Wyoming)
• Eocene of United States (5: Montana, Texas)
Total: 198 collections including 255 occurrences