Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy External Literature Search Age range and collections

Placochelyida

Reptilia - Sauropterygia

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).

Synonymy list
YearName and author
1956Placochelyida Romer p. 78
2000Placochelyida Rieppel
2001Placochelyida Rieppel p. 78

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
RankNameAuthor
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
orderSauropterygia
Placodontiformes
orderPlacodontiaCope 1871
suborderCyamodontoideaNopcsa 1923
PlacochelyidaRomer 1956
PlacochelyidaRomer 1956

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
ReferenceDiagnosis
O. Rieppel 2001Vertical 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.