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Tritylodontoidea (disused)

Mammalia - Multituberculata

Taxonomy
Tritylodontoidea was named by Simpson (1928). It was considered monophyletic by Waldman and Savage (1972).

It was reranked as the infraorder Tritylodontoidea by Waldman and Savage (1972); it was reranked as the superfamily Tritylodontoidea by Tatarinov (2008).

It was assigned to Multituberculata by Simpson (1928), Simpson (1929) and Huene (1940); to Therapsida by Waldman and Savage (1972); to Eucynodontia by Carroll (1988); and to Cynognathia by Tatarinov (2008).

Synonymy list
YearName and author
1928Tritylodontoidea Simpson p. 11
1929Tritylodontoidea Simpson p. 11
1940Tritylodontoidea Huene p. 8
1972Tritylodontoidea Waldman and Savage
1988Tritylodontoidea Carroll
2008Tritylodontoidea Tatarinov

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
RankNameAuthor
Cotylosauria()
Amniota
Synapsida()
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
Allotheria()
orderMultituberculataCope 1884
suborderTritylodontoidea
suborderTritylodontoidea

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
G. G. Simpson 1928Multituberculata having upper molars quadrate, with three rows of two to four cusps each. Cheek teeth little differentiated, at least five molariform teeth of identical pattern, no trenchant premolars. Lachrymals and frontals large. Long narrow palate without vacuities and with choanae far forward.