The vertebra is also otherwise heavily pneumatised, with large opisthocoelous, with convex front centrum facets and concave rear centrum facets.
2.
They are found in frogs and modern reptiles . " Opisthocoelous " vertebrae are the opposite, possessing anterior convexity and posterior concavity.
3.
The generic name refers to Rinc�n de los Sauces, where the fossils were discovered, while the specific name, " caudamirus ", means " amazing in the tail " in Latin, in reference to the unusual shape of the tail vertebrae, especially a strange sequence of procoelous, amphicoelous, opisthocoelous, biconvex and ultimately again procoelous vertebrae shown by one individual.
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