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Mesohippus propinquus
Taxonomy
Mesohippus propinquus was named by Lambe (1905). Its type specimen is Ottawa Mus. 6298, a tooth (second right upper premolar, worn, P2), and it is a 3D body fossil.
It was considered a nomen dubium by Macdonald (1992).
It was considered a nomen dubium by Macdonald (1992).
Synonymy list
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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.
†Mesohippus propinquus Lambe 1905
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. F. Osborn 1918 | (Lambe, 1904, pp. 47-48) Type. Closely allied to and resembling M. bairdii although distinct, slightly larger and more primitive than M. bairdii, proportions different. Cotype. ''In the unworn tooth, Fig. 3 (left upper m2), the ectoloph is well elevated above the cross crests in which the protocone and hypocone are conspicuously higher than the conules. The hypocone exceeds the protocone in height. The protoconule is well defined and distinctly breaks the continuity of the protoloph. The metaloph is fairly continuous and shows a disposition to unite with the ectoloph which, however, it does not reach. The hypostyle is connected at its inner end with the posterior cingulum and outwardly abuts against the ectoloph; it is of fair size. In the ectoloph the mesostyle is conspicuous, the parastyle is flattened and connects with the protoloph, and the ribs are faintly shown. There is no trace of an internal cingulum.'' |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1991, Carroll 1988, Ji et al. 2002, Hendy et al. 2009, Lillegraven 1979 | |||||
Age range: Chadronian or 37.00000 to 33.90000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chadronian | USA (North Dakota) | Mesohippus propinquus (16991) | |
| Chadronian | Canada (Saskatchewan) | Mesohippus propinquus (16919) | |
| Middle Chadronian | Canada (Saskatchewan) | Mesohippus propinquus (16928) |