Hyracodon Leidy 1856 (odd-toed ungulate)

Mammalia - Perissodactyla - Hyracodontidae

Alternative spelling: Rhinoceros (Hyracodon)

Synonym: Mesamynodon Peterson 1931

Full reference: J. Leidy. 1856. Notices of several genera of extinct Mammalia, previously less perfectly characterized. Proceedings of the Academy of Natural Sciences of Philadelphia 8:91-95

Parent taxon: Hyracodontidae according to H. Wang et al. 2016

See also Carroll 1988, Cope 1881, Ferrusquia-Villafranca 1969, Hay 1902, Holbrook 1999, Lambe 1908, Leidy 1856, Leidy 1857, Prothero 1998, Prothero and Schoch 1989, Prothero and Schoch 1989, Radinsky 1966, Rasmussen et al. 1999, Scott 1913 and Wood 1960

Sister taxa: Allaceropinae, Alloceropinae, Ardynia, Epitriplopus, Hyracodontinae, Ilianodon, Pataecops, Praeaceratherium, Prohyracodon, Rhodopagus, Triplopides, Triplopodinae, Triplopus, Ulania, Yimengia

Subtaxa: Hyracodon browni Hyracodon leidyanus Hyracodon major Hyracodon medius Hyracodon nebraskensis Hyracodon petersoni Hyracodon primus Hyracodon priscidens

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Ecology: ground dwelling browser


• Arikareean of United States (2: Nebraska collections)

• Oligocene of United States (48: Colorado, Montana, Nebraska, North Dakota, South Dakota, Wyoming)

• Eocene to Oligocene of United States (1: Wyoming)

• Eocene of Canada (4: Saskatchewan), Mexico (1), United States (52: Colorado, Georgia, Montana, Nebraska, New Mexico, South Dakota, Texas, Utah, Wyoming)

Total: 108 collections including 110 occurrences

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