Mammalia - Perissodactyla - Equidae

PaleoDB taxon number: 49036

Alternative combinations: Equus eurystylus, Hesperohipparion eurystylus, Hipparion eurystyle, Hipparion eurystylum, Hipparion eurystylus, Neohipparion (Hesperohipparion) eurystyle

Synonyms: Hesperohipparion arellanoi Stirton 1955 (no. 330907), Hesperohipparion floresi Stirton 1955 (no. 330906), Hesperohipparion monias Mooser 1963 (no. 330909), Hesperohipparion otomii Mooser 1959 (no. 330908), Hesperohipparion stirtoni Dalquest 1981 (no. 46921), Hipparion molle Merriam 1915 (no. 46993), Hipparion phosphorum Simpson 1930 (no. 46999), Hipparion rectidens Cope 1886 (no. 47003), Hippotherium rectidens Cope 1886 (no. 47048), Neohipparion arellanoi Stirton 1955 (no. 49032), Neohipparion floresi Stirton 1955 (no. 49037), Neohipparion molle Merriam 1915 (no. 49044), Neohipparion monias Mooser 1963 (no. 49045), Neohipparion otomii Mooser 1959 (no. 49049), Neohipparion phosphorum Simpson 1930 (no. 49051), Neohipparion rectidens Cope 1886 (no. 49054)

Full reference: E. D. Cope. 1893. A preliminary report on the vertebrate paleontology of the Llano Estacado. Fourth Annual Report of the Geological Survey of Texas 1892:11-136

Belongs to Neohipparion according to B. J. MacFadden 1998

Sister taxa: Neohipparion affine, Neohipparion gidleyi, Neohipparion leptode, Neohipparion sanjuanensis, Neohipparion trampasense

Type specimens:

• Neohipparion eurystyle: Its type locality is Goodnight's, which is in a Hemphillian terrestrial horizon in the Goodnight Beds Formation of Texas
• Hesperohipparion stirtoni: MWU 11806, a maxilla (Left maxillary fragment with P4-M3 and associated right M2). Its type locality is Coffee Ranch, which is in a Hemphillian terrestrial horizon in Texas.
• Hippotherium rectidens: AMNH 8346, a tooth (An upper ? premolar of the right side).
• Neohipparion arellanoi: Its type locality is Yepomera, which is in a Hemphillian terrestrial horizon in Mexico.
• Neohipparion floresi:
• Neohipparion molle: UCMP 21370, a tooth (upper molar of the left side, M3).
• Neohipparion monias: F. O. 886 (muela superior permanente ). Its type locality is Rancho El Ocote (Basal), which is in a Hemphillian fluvial claystone/sandstone in the Rancho Viejo Beds Formation of Mexico.
• Neohipparion otomii: F. O. 02, 07, 08, 09, 10, 18, 23,. Its type locality is Rancho El Ocote (Basal), which is in a Hemphillian fluvial claystone/sandstone in the Rancho Viejo Beds Formation of Mexico.
• Neohipparion phosphorum: Its type locality is American Cyanimid Company, which is in a Serravallian marginal marine sandstone in the Peace River Formation of Florida.

Ecology: scansorial insectivore

Average measurements (in mm): P3 21.4 x 19.8, P4 21.4 x 19.8, M1 20.2 x 18.8, p3 21.3 x 11.1, p4 21.3 x 11.1, m1 21.0 x 9.6