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Trionychina (disused)

Reptilia - Testudines - Trionychidae

Taxonomy
Trionychina was named by Gray (1825). It is extant. It was considered monophyletic by Meylan (1987).

It was assigned to Trionychini by Meylan (1987) and Karl (2007).

Synonymy list
YearName and author
1825Trionychina Gray
1987Trionychina Meylan
2007Trionychina Karl p. 34

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
RankNameAuthor
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
Sauropsida
classReptilia
Testudinata(Oppel 1811)
orderTestudinesBatsch 1788
suborderCryptodira
familyTrionychidaeGray 1825
subfamilyTrionychinaeGray 1825
tribeTrionychiniGray 1825
subtribeTrionychinaGray 1825
subtribeTrionychinaGray 1825

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.

Subtr. Trionychina Gray 1825
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Diagnosis
ReferenceDiagnosis
P. A. Meylan 1987Members of Trionychini with six ossifications in the corpus hyoidis, epipterygoid fusing to the pterygoid in very large adults, and exoccipital partly or completely isolated from the pterygoid by the basioccipital. Differing further from members of the sister subtribe in its primitive retention of complete eighth pleurals and a smaller intermaxillary foramen (about one-third primary palate).