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Xenicohippus grangeri
Taxonomy
Xenicohippus grangeri was named by Bown and Kihm (1981) [genotype]. Its type specimen is USGS 292, a mandible (right & left mandible fragments with P2–P4), and it is a 3D body fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1981 | Xenicohippus grangeri Bown and Kihm |
| 1998 | Xenicohippus grangeri MacFadden p. 542 |
| 2002 | Xenicohippus grangeri Froehlich p. 174 |
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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.
†Xenicohippus grangeri Bown and Kihm 1981
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. J. Froehlich 2002 | Xenicohippus grangeri has all of the synapomorphies of the derived Xenicohippus clade: P2 large and relatively blade-like (Character 68, 0 to 1), P3 > 20% smaller than M1 linear dimensions (Character 71, 0 to 1), P4 entoconid always present (Character 75, 1 to 2), and lower molar paracristid a 30° to long axis of tooth (Character 87, 1 to 2), but lacks any autapomorphies in this analysis. It can be distinguished from Xenicohippus osborni by the relative size and morphology of the anterior premolars, specifically: P2 with postero-basal cusp, P3 relatively smaller than in X. osborni with weak metaconid, P4 relatively smaller than in X. osborni, and P4 and M1 about equal in size. |