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Desmatippus nebrascensis
Taxonomy
Parahippus nebrascensis was named by Peterson (1907) [also said to be 1907]. Its type specimen is CM 1440, a partial skeleton (a skull with the left mandible practically complete, the pelvis, the right femur, tibia, calcaneum, astragalus, and the proximal end of a metapodial of one indi), and it is a 3D body fossil. Its type locality is Niobrara Canyon, which is in a Harrisonian terrestrial horizon in the Marsland Formation of Nebraska.
It was recombined as Desmatippus nebrascensis by MacFadden (1998).
It was recombined as Desmatippus nebrascensis by MacFadden (1998).
Subspecies
Synonymy list
| Year | Name and author |
|---|---|
| 1907 | Parahippus nebrascensis Peterson p. 57 figs. Pl. XIX |
| 1918 | Parahippus nebrascensis Osborn p. 79 figs. Text Fig. 55 |
| 1937 | Parahippus nebrascensis Schlaikjer p. 271 |
| 1940 | Parahippus nebrascensis Stirton p. 177 |
| 1998 | Desmatippus nebrascensis MacFadden p. 546 |
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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.
†Desmatippus nebrascensis Peterson 1907
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†Parahippus nebrascensis primus Osborn 1918
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. F. Osborn 1918 | (Peterson, 1907) (1) An animal of large size. (2) Premolars of proportionately large size when compared with molars, p2 the longest tooth of premolar series; (3) protostyle of p2 unusually well developed; (4) posterointernal tubercle of m2 [hypostyle] more highly developed than in P. texanus. (5) Lachrymal fossa plainly indicated; (6) anterior border of orbit opposite anterior portion of m3; (7) orbit closed posteriorly.
(Osborn, 1918) (1) Hypostyle of molars and premolars subtriangular; (2) crochet developed on metaloph of p4, m3; (3) metaloph uniting throughout grinding series, pLm3, with ectoloph; (4) dentition brachyodont, robust. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Carroll 1988, Lillegraven 1979, Ji et al. 2002, Hendy et al. 2009, Nowak 1991 | |||||
Age range: Harrisonian or 23.10000 to 18.50000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Harrisonian | USA (Nebraska) | Parahippus nebrascensis (type locality: 17809) | |
| Harrisonian | Canada (Saskatchewan) | Parahippus nebrascensis (17758) |