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Archaeotragulus krabiensis
Taxonomy
Archaeotragulus krabiensis was named by Metais et al. (2001). Its type specimen is TF 2997, a mandible (sin. with p2-m2), and it is not a trace fossil. Its type locality is Wai Lek pit, which is in an Eocene terrestrial lignite in the Krabi Basin B2 Formation of Thailand. It is the type species of Archaeotragulus.
Synonymy list
| Year | Name and author |
|---|---|
| 2001 | Archaeotragulus krabiensis Metais et al. p. 232 |
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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.
†Archaeotragulus krabiensis Metais et al. 2001
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. Metais et al. 2001 | Small primitive ruminant with lower molars resembling those of Dorcatherium by the presence of a typical tragulid M structure at the rear of the trigonid and the derived pattern of its lower premolars, including the lack of a metaconid and the presence of a longitudinal groove on the posterior half of p4. Differs from Dorcatherium by its smaller size, its cusps more labio-lingually compressed, the lack of an ectostylid, the presence of a well-marked ‘entoconidian groove’ opening forwards, the presence of a rudimentary hypoconulid on m2–3 and by the transversely compressed hypoconulid on m3. Differs from Iberomeryx by its larger size, its cristid obliqua more lingually orientated, a well-marked M structure on the posterior side of the trigonid, the absence of an ectostylid and by its transversely compressed and pinched hypoconulid on m3. Archaeotragulus further differs from Zhailimeryx by its M structure, the lack of rudimentary paraconid on the lower molar and by its p4 lacking both distinct metaconid and entoconid. |
Measurements
No measurements are available
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| Source: f = family, o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1991, Lillegraven 1979, Carroll 1988, Nowak 1999, Hendy et al. 2009 | |||||
Age range: Late/Upper Eocene or 37.20000 to 33.90000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Eocene | Thailand | Archaeotragulus krabiensis (13127 type locality: 49078) |