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Yoderimys yarmeri
Taxonomy
Yoderimys yarmeri was named by Wilson and Runkel (1991). Its type specimen is TMM 42153-2, a mandible (Left mandible with p4-m3), and it is a 3D body fossil. Its type locality is Coffee Cup, which is in a Chadronian terrestrial horizon in the Devil's Graveyard Formation of Texas.
Entered
by J. Alroy on 2003-01-23; modified by J. Marcot on 2026-05-08
Synonymy list
| Year | Name and author |
|---|---|
| 1991 | Yoderimys yarmeri Wilson and Runkel p. 11 figs. 7Figure 7, Table 9a |
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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.
†Yoderimys yarmeri Wilson and Runkel 1991
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. A. Wilson and A. C. Runkel 1991 | About the same size as Y. hurkei, which is the largestspecies ofYoderimys. P4 longer than M,. M, to M 3 wider anteriorly than posteriorly. Protoconid and metaconid on P4 high. Trigonid basin of P4 open anteriorly, apparently without an anteroconid. Anteroconid prominent on Mj to M 3. Teeth brachydont, metaconid and entoconid high. P4 has a double mesolophid, each loop pointed lingually at right angles to the midline of the tooth row. The mesolophid originates from a lophid that connects the base of the metaconid with the buccal margin of the entoconid. A hypolophid connects the hypoconid with the entoconid. Posterolophids are prominent on all teeth. The anterior cingulum closes off a trigonid basin lingually. A continuous loph zig-zags from the anterocone, only slightly buccal to the anteroposterior center of the tooth row, to the lingual base of the hypocone where it turns linguad to form the posterior cingulum. On M, a small mesolophid is directed toward the entoconid, on M 2 a small mesolophid forms a loop enclosing a lake at the base of the metaconid, and on M 3 the metalophid is directed toward the entoconid. With a larger sample this structure probably would be variable. |
Measurements
No measurements are available
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| Source: o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Carroll 1988, Lillegraven 1979, Ji et al. 2002, Hendy et al. 2009, Nowak 1999 | |||||
Collections
No collection or age range data are available