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Simpsonodon sibiricus
Taxonomy
Simpsonodon sibiricus was named by Averianov et al. (2010). Its type specimen is PIN 5087/5, a mandible (L dentary fragment with 3 last molariform teeth, alveolus for a more anterior tooth, and base of coronoid process), 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.
Synonymy list
| Year | Name and author |
|---|---|
| 2010 | Simpsonodon sibiricus Averianov et al. pp. 126-127 fig. 3 |
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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.
†Simpsonodon sibiricus Averianov et al. 2010
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. O. Averianov et al. 2010 | Simpsonodon sibiricus sp. nov. is very similar to Simpsonodon oxfordensis Kermack et al., 1987 from the Bathonian of England, the only known previously species of the genus, in size and morphology of the lower molariform teeth. The two species can be nevertheless distinguished by the structure of the mesial cingulid. In S. sibiricus sp. nov. it is clearly divided into two portions: a short labial arm directed mesiolingually and a longer lingual arm wrapping around the mesiolingual corner of the crown and extending towards the base of the mesiolingual cusp g. In S. oxfordensis this division is not clear and a long mesial cingulid is wrapping around the entire mesial end of the crown towards the base of the mesiolingual cusp g. |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum, uc = unranked clade | |||||
| References: Hendy et al. 2009, Kiessling 2004, Luo et al. 2003, Carroll 1988 | |||||