Mammalia - Perissodactyla - Hyracodontidae
Parent taxon: Rhinocerotoidea according to H. Wang et al. 2016
See also Carroll 1988, Cope 1881, Cope 1889, Dashzeveg 1996, Ferrusquia-Villafranca 1969, Hay 1902, Holbrook 1999, Lambe 1908, Peterson 1919, Prothero and Schoch 1989 and Radinsky 1966
Sister taxa: Amynodontidae, Caenolophus, Eggysodontidae, Ergilia, Huananodon, Hyrachyidae, Meschotherium, Ninxiatherium, Paraceratheriidae, Punjabitherium, Rhinocerotidae, Siamolophus, Symphysorrhachis, Toxotherium, Veragromovia
Subtaxa: Allaceropinae Alloceropinae Ardynia Epitriplopus Hyracodon Hyracodontinae Ilianodon Pataecops Praeaceratherium Prohyracodon Rhodopagus Triplopides Triplopodinae Triplopus Ulania Yimengia
Type: Hyracodon
Ecology: ground dwelling browser
Distribution:
• Arikareean of United States (2: Nebraska collections)
• Oligocene of China (3), Georgia (1), Kazakhstan (1), United States (49: Colorado, Montana, Nebraska, North Dakota, South Dakota, Wyoming)
• Eocene to Oligocene of China (1), United States (1: Wyoming)
• Eocene of Canada (4: Saskatchewan), China (30), Kazakhstan (3), Kyrgyzstan (1), Mexico (1), Mongolia (9), United States (87: California, Colorado, Georgia, Montana, Nebraska, New Mexico, South Dakota, Texas, Utah, Wyoming)
Total: 193 collections including 219 occurrences