Paramerychyus harrisonensis Peterson 1907

Mammalia - Ungulata - Merycoidodontidae

Alternative combinations: Merychyus harrisonensis, Merycoides harrisonensis, Ticholeptus harrisonensis

Synonyms: Hypsiops luskensis Schultz and Falkenbach 1950, Phenacocoelus luskensis Schultz and Falkenbach 1950

Full reference: O. A. Peterson. 1907. The Miocene Beds of Western Nebraska and Eastern Wyoming and Their Vertebrate Faunae. Annals of Carnegie Museum 4(3):21-72

Belongs to Paramerychyus according to C. B. Schultz and C. H. Falkenbach 1947

See also Lander 1998, Loomis 1923, MacFadden 1980, Peterson 1907, Schultz and Falkenbach 1950, Stevens and Stevens 2007 and Thorpe 1937

Sister taxon: Paramerychyus relictus

Type specimens:

  • Paramerychyus harrisonensis: CM 1341, a partial skull (a fairly well preserved skull which has been somewhat crushed vertically and is without the lower jaws). Its type locality is Van Tassel (Lower), which is in a Harrisonian terrestrial horizon in Wyoming.
  • Hypsiops luskensis: F:AM 44853A, a partial skeleton (skull, mandible, and probably associated postcranial elements). Its type locality is Eighteen Mile District, which is in a Harrisonian terrestrial horizon in Wyoming.


• Harrisonian of United States (14: Montana, Nebraska, Texas, Wyoming collections)

• Arikareean of United States (1: California)

• Oligocene of United States (1: South Dakota)

Total: 16 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.

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