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Anthracolestes sergeii
Taxonomy
Anthracolestes sergeii was named by Averianov et al. (2014). Its type specimen is PIN 5087/22, a tooth (left lower molar), and it is a 3D body fossil. Its type locality is Berezovsk Quarry, which is in a Bathonian fluvial claystone in the Itat Formation of the Russian Federation. It is the type species of Anthracolestes.
Synonymy list
| Year | Name and author |
|---|---|
| 2014 | Anthracolestes sergeii Averianov et al. pp. 924-925 figs. 2-6 |
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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.
†Anthracolestes sergeii Averianov et al. 2014
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. O. Averianov et al. 2014 | Referred toDryolestidae by lower molars showing unilateral hypsodonty and small and labially placed distal root, by having a pronounced precingulid instead of cusp f on lower molars, and unequal alveolar borders of the dentary mandibular ramus. Differs from all other, more derived members of Dryolestidae by plesiomorphic retention of mesiodistally relatively uncompressed lower molars (L/W ratio greater than 1.1), transverse protocristid, short mandibular symphysis, terminating at the lower canine, and a very shallow mandibular ramus of the dentary. Two homoplasies are autapomorphic for the new taxon: uppercase lambda-shaped paracristid-protocristid in occlusal view (reversal) and Meckelian groove parallel to the ventral border of the dentary (parallelism with stem zatherians). Differs from Amblotherium by a paraconid that has half the size of the metaconid. Differs from all Dryolestidae except Amblotherium and Crusafontia by a pointed metaconid. Differs from Amblotherium and Crusafontia by the lack of a labial cingulid at the lower molars. Differs from Achyrodon and Phascolestes by a postcingulid that extends between the talonid and the base of the protoconid. Differs from Crusafontia, Achyrodon, and Phascolestes by an anterior border of the coronoid process that is not vertical. |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum, uc = unranked clade | |||||
| References: Luo et al. 2003, Hopson 1973, Carroll 1988, Hendy et al. 2009 | |||||