Miohippus obliquidens Osborn 1904

Mammalia - Perissodactyla - Equidae

Alternative combination: Mesohippus obliquidens

Synonyms: Mesohippus antiquus Schlaikjer 1935, Mesohippus brachystylus Osborn 1904, Mesohippus eulophus Osborn 1904, Mesohippus meteulophus Osborn 1904, Miohippus antiquus Schlaikjer 1935, Miohippus brachystylus Osborn 1904, Miohippus meteulophus Osborn 1904, Miohippus metulophus Osborn 1904, Pediohippus antiquus Schlaikjer 1935, Pediohippus brachystylus Osborn 1904

Full reference: H. F. Osborn. 1904. New Oligocene horses. Bulletin of the American Museum of Natural History 20(13):167-179

Belongs to Miohippus according to B. J. MacFadden 1998

See also Douglass 1908, Forsten 1974, Gregory 1920, Lambe 1908, Macdonald 1951, Osborn 1904, Osborn 1918, Prothero and Shubin 1989, Schlaikjer 1935, Scott 1941, Sinclair 1924 and Stirton 1940

Sister taxa: Miohippus anceps, Miohippus annectens, Miohippus assiniboiensis, Miohippus condoni, Miohippus equiceps, Miohippus equinanus, Miohippus gemmarosae, Miohippus gidleyi, Miohippus grandis, Miohippus intermedius, Miohippus longicristis, Miohippus primus, Miohippus quartus, Miohippus taxus

Type specimens:

  • Miohippus obliquidens: AMNH 668, a skull (skull and jaws). Its type locality is Middle Oreodon Beds (1892 AMNH Collection), which is in an Orellan terrestrial horizon in the Brule Formation of South Dakota.
  • Mesohippus brachystylus: AMNH 11860, a partial skull (posterior portion of facial and cranial region of skull with complete upper dental series of left side, adult).
  • Mesohippus eulophus: AMNH 8791, a partial skull (a complete adult superior dental series of the left side and portion of cranium).
  • Mesohippus meteulophus: AMNH 1210, a skull (adult skull and jaws). Its type locality is Indian Stronghold (Leptauchenia Beds), which is in a Whitneyan terrestrial horizon in the Brule Formation of South Dakota.
  • Pediohippus antiquus: MCZ 2790, a maxilla (A left maxilla with P2-M3). Its type locality is Harvard Fossil Reserve (Main Level), which is in an Orellan terrestrial horizon in the Brule Formation of Wyoming.


• Arikareean of United States (1: South Dakota collection)

• Oligocene of United States (8: Colorado, Montana, North Dakota, South Dakota, Wyoming)

• Eocene of United States (1: Montana)

Total: 10 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.

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