Ustatochoerus major Leidy 1858

Mammalia - Artiodactyla - Merycoidodontidae

Alternative combinations: Merychyus major, Metoreodon major

Synonyms: Merychyus (Metoreodon) profectus Matthew and Cook 1909, Merychyus profectus Matthew and Cook 1909, Ticholeptus profectus Matthew and Cook 1909, Ustatochoerus profectus Matthew and Cook 1909, Ustatochoerus skinneri Schultz and Falkenbach 1941

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 M. S. Stevens et al. 2023

See also Barbour and Cook 1917, Cook 1912, Cope 1884, Gregory 1942, Hay 1902, Kelly and Lander 1988, Lander 1998, Leidy 1858, Leidy 1873, Loomis 1924, Matthew 1924, Matthew and Cook 1909, Morgan et al. 2009, Schultz and Falkenbach 1941, Schultz and Falkenbach 1947, Schultz and Falkenbach 1949, Stevens and Stevens 1989, Stevens and Stevens 2007, Thorpe 1937 and Voorhies 1990

Sister taxa: Ustatochoerus californicus, Ustatochoerus leptoscelos, Ustatochoerus medius, Ustatochoerus tedfordi

Subtaxa: Merychyus major major Ustatochoerus major texanus Ustatochoerus profectus espanolensis Ustatochoerus profectus nevadaensis Ustatochoerus profectus studeri Ustatochoerus skinneri santacruzensis

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Type specimens:

  • Ustatochoerus major: NM 439, a maxilla (Partial right maxilla with P3-M3). Its type locality is Niobrara River (coll. Hayden 1857), which is in a Barstovian/Clarendonian terrestrial horizon in the Loup Fork Formation of Nebraska.
  • Merychyus (Metoreodon) profectus: AMNH 14055, a mandible.
  • Ustatochoerus skinneri: F:AM 33630, a partial skeleton ( Skull (lacking left zygomatic arch) with I1-M3, mandible with i1-m3, partial humerus, femur, and partial tibia. (w+)). Its type locality is Turtle Butte (Cap Rock), which is in a Clarendonian terrestrial horizon in the Ash Hollow Formation of South Dakota.

Distribution:

• Hemphillian of United States (2: Nebraska collections)

• Miocene of United States (42: California, Nebraska, Nevada, New Mexico, South Dakota, Texas)

Total: 44 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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