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Merychippus coloradense
Taxonomy
Hipparion coloradense was named by Osborn (1918). Its type specimen is AMNH 9094, a partial skeleton (Upper grinding teeth, m1- 2, of the left side, ulna, radius, and hind foot), and it is a 3D body fossil.
It was recombined as Neohipparion coloradense by Hesse (1936), Stirton (1940), Galbreath (1953) and MacFadden (1984); it was considered a nomen dubium by Macdonald (1992); it was recombined as Merychippus coloradense by Webb and Hulbert (1986), Kelly (1995) and MacFadden (1998).
It was recombined as Neohipparion coloradense by Hesse (1936), Stirton (1940), Galbreath (1953) and MacFadden (1984); it was considered a nomen dubium by Macdonald (1992); it was recombined as Merychippus coloradense by Webb and Hulbert (1986), Kelly (1995) and MacFadden (1998).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1918 | Hipparion coloradense Osborn p. 183 figs. Text Fig. 146 |
| 1933 | Hipparion sanfondensis Frick |
| 1936 | Neohipparion coloradense Hesse p. 62 |
| 1940 | Neohipparion coloradense Stirton p. 183 |
| 1953 | Neohipparion coloradense Galbreath |
| 1984 | Neohipparion coloradense MacFadden p. 85 figs. 19, 48-62, 147, 150 |
| 1986 | Merychippus coloradense Webb and Hulbert, Jr. |
| 1995 | Merychippus coloradense Kelly p. 26 |
| 1998 | Merychippus coloradense MacFadden p. 547 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Merychippus coloradense Osborn 1918
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Invalid names: Hipparion sanfondensis Frick 1933 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. F. Osborn 1918 | Matthew (1913) (1) Size large to medium. (2) Upper molars lorig-crowned, moderately curved, mesostyle
heavy, narrowing slowly toward summit of crown; (3) protocones separate except at base of crown; (4) protocone large, strongly flattened, fossette borders considerably infolded, fossettes contracted; (5) pli caballin strong, (6) metastylid on P2 widely separated from metaconid; (7) metastylid-metaconid column broad, deeply grooved to base of tooth; (8) outer surface of protoconid and metaconid considerably flattened; (9) anterior cingulum a prominent plate on internal and external sides of lower teeth, expanding toward crown; (10) lower incisors large, preorbital region moderately elon- gate. (11) Ulnar shaft greatly reduced, slender, thread-like tQward middle, distal half unknown; (12) metapodials long, lateral digits much reduced; (13) a facet on Mts. III for mesocuneiform. This character is otherwise unknown in the Hipparion of America and belongs to Pliohippus and the Hipparion of Europe. |