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Psephosaurus
Taxonomy
Psephosaurus was named by Fraas (1896) [Sepkoski's age data: Tr Anis-l Tr Rhae Sepkoski's reference number: 2,940].
It was assigned to Nothosauria by Fraas (1896); to Cyamodontidae by Carroll (1988); to Placochelyidae by Kuhn (1971), Rieppel (2000); and to Placodontia by Sepkoski (2002).
It was assigned to Nothosauria by Fraas (1896); to Cyamodontidae by Carroll (1988); to Placochelyidae by Kuhn (1971), Rieppel (2000); and to Placodontia by Sepkoski (2002).
Species
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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
No diagnoses are available