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Placochelyida
Taxonomy
Placochelyida was named by Romer (1956).
It was reranked as the superfamily Placochelyida by Rieppel (2000).
It was assigned to Cyamodontoidea by Rieppel (2000) and Rieppel (2001).
It was reranked as the superfamily Placochelyida by Rieppel (2000).
It was assigned to Cyamodontoidea by Rieppel (2000) and Rieppel (2001).
Synonymy list
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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.
Unr. †Placochelyida Romer 1956
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G. †Macroplacus Schubert and Klempnauer 1975
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†Macroplacus raeticus Schubert and Klempnauer 1975
G. †Psephoderma von Meyer 1858
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†Psephoderma alpinum Meyer 1858
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Invalid names: Placochelys malanchinii Boni 1948 [synonym], Placochelys stoppanii Pinna 1980 [synonym], Placodus zitteli Amman 1878 [synonym]
†Psephoderma anglicum Meyer 1864
†Psephoderma sculptata Rieppel 2002
Invalid names: Placochelyanus Pinna 1976 [synonym]
Invalid names: Macroplacidae Rieppel 2000 [empty], Protenodontosauridae Rieppel 2000 [empty]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| O. Rieppel 2001 | Vertical suture between maxilla and jugal below midpoint of orbit; postorbital with medioventral process abutting the epipterygoid; maxilla with anterolateral process tapering off along lateral margin of rostrum; ventral surface of rostrum concave; palatine extends laterally to meet jugal. |