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Palaeoscaptor acridens
Taxonomy
Palaeoscaptor acridens was named by Matthew and Granger (1924) [Matthew & Granger did not specifically indicate a type species for Palaeoscaptor, but based on page priority, P. acridens would be the type species. The other species described at the same time is P. rectus.]. It is not extant. Its type specimen is AMNH 19138, a mandible (sin. with p4-m3). Its type locality is 15 miles east of Loh, which is in an Oligocene terrestrial horizon in the Hsanda Gol Formation of Mongolia.
Synonymy list
| Year | Name and author |
|---|---|
| 1924 | Palaeoscaptor acridens Matthew and Granger p. 2 |
| 2004 | Palaeoscaptor acridens Wang and Qiu p. 131 |
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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.
†Palaeoscaptor acridens Matthew and Granger 1924
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. D. Matthew and W. Granger 1924 | Dentition probably /2./1./3./3/ First incisor (?i2) enlarged, a long slender, simple procumbent tooth, enamelled, without heel or serrations; second incisor not preserved, the alveolus quite small, round oval; the canine small, root semi-double, crown premolariform and extended forward, followed by a similar but somewhat smaller and less forwardly extended tooth with semi-double root; the last premolar two-rooted, small, sub-molariform, with trigonid-like main cusp and small transversely-crested heel; m1 much larger, with trigonid longer than wide, of three sharply angulate cusps, and deeply basined heel with acute cusps at posterior angles. m2 considerably smallr than m1, similar trigonid relatively lower and shorter; m3 much reduced, with low single-cusped heel. The heel cusp is of considerable size on the type, but in other specimens it is vestigal; there is also a considerable range in size in the twenty or more fragmentary jaws that represent the genus; but we are unable to fix associated constant distinctions to dived the material into species. |