Eporeodon occidentalis Marsh 1873

Mammalia - Artiodactyla - Merycoidodontidae

Alternative combinations: Eucrotaphus occidentalis, Merycochoerus occidentalis, Oreodon occidentalis

Synonyms: Dayohyus trigonocephalus Cope 1884, Dayohyus wortmani Schultz and Falkenbach 1968, Desmatochoerus (Paradesmatochoerus) thurstoni Stock 1934, Desmatochoerus thurstoni Stock 1934, Eporeodon condoni Thorpe 1921, Eporeodon davisi Schultz and Falkenbach 1968, Eporeodon leptacanthus Cope 1884, Eporeodon longifrons Cope 1884, Eporeodon thurstoni Stock 1934, Eporeodon trigonocephalus Cope 1884, Eucrotaphus trigonocephalus Cope 1884, Pseudogenetochoerus condoni Thorpe 1921

Full reference: O. C. Marsh. 1873. Notice of new Tertiary mammals. American Journal of Science 5(29):407-410

Belongs to Eporeodon according to M. S. Stevens et al. 2023

See also Cope 1884, Douglass 1906, Fremd 1994, Hay 1902, Lander 1983, Lander 1998, Marsh 1873, Marsh 1875, Mason and Swisher 1989, Schultz and Falkenbach 1954, Schultz and Falkenbach 1968, Stevens and Stevens 2007, Stirton 1960, Stock 1934, Thorpe 1921, Thorpe 1924 and Thorpe 1937

Sister taxa: Eporeodon (Oreodontoides), Eporeodon (Paraeporeodon), Eporeodon pacificus

Subtaxa: Eporeodon trigonocephalus parvus

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Type specimens:

  • Eporeodon occidentalis: YPM 10142, a partial skull
  • Dayohyus wortmani: UCMP 1911, a partial skull (Skull with I1(rt.)-M3 (P1-P2 rt.).).
  • Eporeodon condoni: YPM 11016.
  • Eporeodon davisi: AM 7576, a partial skull (Partial skull with P2(rt.)-M3). Its type locality is The Cove, which is in a Miocene/Miocene terrestrial horizon in the John Day Formation of Oregon.
  • Eporeodon leptacanthus:
  • Eporeodon longifrons: AMNH 7504, a partial skull.
  • Eporeodon thurstoni: CIT 1566, a skeleton (partial skull and most of skeleton). Its type locality is Willard Canyon, South Mountain (CIT 157), which is in an Arikareean fluvial-lacustrine siltstone/sandstone in the Sespe Formation of California.
  • Eucrotaphus trigonocephalus: AMNH 7505, a partial skull (Skull with I1-P1 rt. and P2-M3 (alv.) (P3 and M1 alv.)).

Distribution:

• Miocene of United States (1: Oregon collection)

• Arikareean of United States (2: California, Oregon)

• Oligocene of United States (4: Oregon)

Total: 7 collections including 8 occurrences

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Specimen images are retrieved through the ePANDDA API.


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