|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Reptilia - Rhynchocephalia
It was considered a nomen dubium by Apesteguia and Carballido (2014).
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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.
|S. Apesteguía and F. E. Novas 2003 (Priosphenodon avelasi)||Priosphenodon differs from other sphenodontians in the following combination of features: robust skeleton with adult up to 1m long; single, sharp, beak-like structure on the rostral end of the skull; bulging nasals; frontals rostrally straight; jugals dorsoventrally deep; suborbital fenestrae closed by transversely oriented ectopterygoids; maxillary and palatine tooth rows elongate, straight and in parallel; palatal roof narrow; teeth closely packed, with imbricate labial and lingual flanges; no caniniform teeth and no dental regionalization; and square, distally expanded unguals.|
|M. E. Simon and A. W. A. Kellner 2003||Eilenodontian sphenodontid with lower jaw showing a marked dorsoventral symphysial expansion on the medial surface; dorsoanteriorly oriented edentulous ridge; short anteroposteriorly oriented symphysial shelf; pronounced gap between the coronoid process and the last tooth; and ventral margin of the dentary close to the symphysis strongly concave|