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Parahippus coloradensis
Taxonomy
Parahippus coloradensis was named by Gidley (1907). Its type specimen is AMNH 9040, a tooth, and it is a 3D body fossil. Its type locality is Pawnee Buttes (Upper Beds), which is in a Miocene terrestrial horizon in Colorado.
It was synonymized subjectively with Parahippus pawniensis by Morea (1981); it was considered a nomen dubium by Macdonald (1992).
It was synonymized subjectively with Parahippus pawniensis by Morea (1981); it was considered a nomen dubium by Macdonald (1992).
Subspecies
Synonymy list
| Year | Name and author |
|---|---|
| 1907 | Parahippus coloradensis Gidley |
| 1918 | Parahippus coloradensis Osborn p. 93 figs. Plates 8.7,12. Text Fig. 70 |
| 1937 | Parahippus coloradensis Schlaikjer p. 272 |
| 1940 | Parahippus coloradensis Stirton p. 177 |
| 1998 | Parahippus coloradensis MacFadden |
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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.
†Parahippus coloradensis Gidley 1907
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†Parahippus coloradensis praecurrens Osborn 1918
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. F. Osborn 1918 | (Gidley, 1907, p. 933) "(1) Larger than P. pawnienaia, about equalling P. creniderl8 in size; (2) tooth
crown comparatively high; (3) outer walls of paracone and metacone strongly ribbed; (4) metaloph with crochet well developed, the type tooth presenting two additional enamel folds; (5) the metastylid of the lower teeth well developed and separated from "the metaconid by a well marked groove reaching nearly to the base of the crown. (6) On the externll.l walls of the lower teeth the enamel is very rough, almost wrinkled in appearance." (Osborn, 1918) The type, m3, Amer. Mus. 9040, is quite distinctive, the crochet not being single but represented by two enamel folds. One of the lower jaws selected by·Gidley as a paratype, Amer. Mus. 9412, belongs to an animal of larger size and probably a distinct species, consequently the above species characters (5 and 6), based by the author on these particular teeth, are invalid. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Ji et al. 2002, Lillegraven 1979, Carroll 1988, Nowak 1991 | |||||
Age range: base of the Miocene to the top of the Barstovian or 23.04000 to 12.50000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Harrisonian | USA (South Dakota) | Parahippus coloradensis (17748) | |
| Miocene | USA (Colorado) | Parahippus coloradensis (type locality: 18310) | |
| Hemingfordian | USA (Colorado) | Parahippus coloradensis (17908) | |
| Barstovian | USA (Oregon) | Parahippus coloradensis (19056) |