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Axainamasia
Taxonomy
Axainamasia was named by Métais et al. (2024). Its type is Axainamasia sandersi. It was considered monophyletic by Métais et al. (2024).
It was assigned to Palaeoamasiidae by Métais et al. (2024).
It was assigned to Palaeoamasiidae by Métais et al. (2024).
Species
A. sandersi (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2024 | Axainamasia Métais et al. |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. Métais et al. 2024 | Upper molar occlusal proportions more transverse (mesiodistally shorter and buccolingually broader) than those of Palaeoamasia or Crivadiatherium, with paraloph and metaloph approximating a buccolingual orientation, as opposed to the more oblique orientation of these lophs in other palaeoamasids. Postparacrista and postmetacrista of upper molars highly vestigial, in contrast to the stronger expression of these crests on upper molars of Stylolophus. Postmetacrista of upper molars weaker than those of Palaeoamasia and (especially) Crivadiatherium. Upper molars smaller, more brachyodont, and retaining distinct protocone and metaconular hypocone, in contrast to those of Namatherium and Arsinoitherium. |