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Merychippus stevensi
Taxonomy
Merychippus stevensi was named by Dougherty (1940). Its type specimen is CIT 2582, a tooth (M1 or M2), and it is a 3D body fossil. Its type locality is CIT 322, which is in a Miocene terrestrial horizon in California.
Synonymy list
| Year | Name and author |
|---|---|
| 1940 | Merychippus stevensi Dougherty p. 133 figs. Plate 4, figure 9; plate 5, figures 2-6a |
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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 stevensi Dougherty 1940
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. F. Dougherty 1940 | One-third larger, with cheek teeth higher-crowned than in M. carrizoensis. (Compare plate 4, figs. 1 and 9.) Height and size of crown comparable to that in M. isonesus. Fossette borders of upper cheek teeth less complicated than in M. californicus. Protocone attached firmly to p;rotoconule, this union occurring immediately after wear begins. The writer takes pleasure in naming this species for John B. Stevens, geologist of the Associated Oil Company of California.
Merychippus stevensi is represented by eight upper teeth, two fragmentary lowers, and an ungual phalanx of the median digit. Some variation in characters is exhibited by the teeth, but all specimens are distinct from those referred to. M. carrizoensis. |
Measurements
No measurements are available
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| Source: subf = subfamily, subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Ji et al. 2002, MacFadden 1998, Carroll 1988, Hendy et al. 2009, Nowak 1991 | |||||