Mammalia - Perissodactyla - Equidae
Alternative combinations: Equus (Dolichohippus) simplicidens, Equus (Plesippus) simplicidens, Equus simplicidens, Hippotigris simplicidens, Pliohippus simplicidens
Synonyms: Asinus pons Quinn 1958, Equus (Hemionus) tau Owen 1869, Equus achates Hay and Cook 1930, Equus littoralis Hay 1913, Equus pons Quinn 1958, Equus shoshonensis Gidley 1930, Equus tau Owen 1869, Hippotigris shoshonensis Gidley 1930, Onager littoralis Hay 1913, Plesippus shoshonensis Gidley 1930
Full reference: E. D. Cope. 1892. A contribution to the vertebrate paleontology of Texas. Proceedings of the American Philosophical Society 30(137):123-131
Belongs to Plesippus according to C. I. Barrón-Ortiz et al. 2019
See also Cope 1892, Cope 1893, Dalquest 1979, Dalquest and Hughes 1965, Downs and Miller 1994, Forsten and Eisenmann 1995, Gazin 1936, Gidley 1901, Gidley 1903, Gidley 1907, Gidley 1930, Harris 1993, Hay 1902, Hay 1913, Hibbard 1955, Hibbard and Riggs 1949, Hibbard and Taylor 1960, Hulbert 1995, Kelly 1994, Kelly 1995, Kelly 1997, Kelly 1998, Kurten and Anderson 1980, Macdonald 1992, MacFadden 1998, Matthew 1909, Matthew 1924, McDonald 1996, McGrew 1944, Meade 1945, Osborn 1918, Quinn 1955, Quinn 1957, Quinn 1958, Repenning et al. 1995, Savage 1951, Schultz 1936, Schultz 1990, Schultz and Howard 1935, Skinner and Hibbard 1972, Stirton 1940, Strain 1966 and Winans 1989
Sister taxa: Equus (Plesippus) crenidens, Plesippus francescana, Plesippus idahoensis
Type specimens:
- Plesippus simplicidens: TMM 40282-6, a tooth (left M1)
- Equus achates: DMNS 1085, a tooth (isolated upper M2).
- Equus littoralis:
- Equus pons: U.A. no. 9, a maxilla. Its type locality is Comosi Wash, which is in a Blancan terrestrial horizon in Arizona.
- Equus shoshonensis: USNM 11986, a partial skeleton. Its type locality is Hagerman (Gidley Horse Quarry), which is in a Blancan terrestrial horizon in the Glenns Ferry Formation of Idaho.
- Equus tau:
Distribution:
• Quaternary of Mexico (2 collections), United States (12: California, Georgia, New Mexico, Texas)
• Blancan of Mexico (7), United States (63: Arizona, California, Colorado, Idaho, Kansas, Nebraska, Nevada, New Mexico, Texas, Washington)
• Pliocene of Mexico (1), United States (1: Texas)
Total: 86 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.