Ustatochoerus medius Leidy 1858 (oreodont)

Mammalia - Ungulata - Merycoidodontidae

Alternative combinations: Merychyus medius, Metoreodon medius

Synonyms: Merycochoerus cenopus Scott 1890, Merycochoerus coenopus Scott 1890

Full reference: J. Leidy. 1858. Notice of Remains of Extinct Vertebrata, from the Valley of the Niobrara River, Collected during the Exploring Expedition of 1857, in Nebraska, under the Command of Lieut. G. K. Warren, U. S. Top. Eng., by Dr. F. V. Hayden, Geologist to the Expedition. Proceedings of the Academy of Natural Sciences of Philadelphia 10:15-89

Belongs to Ustatochoerus according to S. R. May 2019

See also Cassiliano 1980, Cope 1884, Galbreath 1953, Hay 1902, Kelly and Lander 1988, Lander 1998, Lander and Kelly 1989, Leidy 1858, Morgan et al. 2009, Schultz and Falkenbach 1941, Schultz and Falkenbach 1947, Scott and Osborn 1890, Stevens and Stevens 1989, Stevens and Stevens 2007, Thorpe 1937 and Voorhies 1990

Sister taxa: Ustatochoerus californicus, Ustatochoerus compressidens, Ustatochoerus leptoscelos, Ustatochoerus major, Ustatochoerus profectus, Ustatochoerus schrammi, Ustatochoerus skinneri

Subtaxa: Merychyus medius novomexicanus Ustatochoerus medius mohavensis Ustatochoerus medius novomexicanus

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Type specimens:

  • Ustatochoerus medius: NM 118, a mandible (Partial left ramus with m1-m3)
  • Merycochoerus coenopus:

Ecology: ground dwelling herbivore


• Miocene of United States (73: California, Colorado, Kansas, Nebraska, Nevada, New Mexico, Oklahoma, South Dakota, Texas, Wyoming collections)

Total: 73 collections including 76 occurrences

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Specimen images are retrieved through the ePANDDA API.

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