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Champsosaurus

Reptilia -

Synonyms
Synonymy list
YearName and author
1876Champsosaurus Cope pp. 348-350
1876Champsosaurus profundus Cope pp. 350-351
1876Champsosaurus annectens Cope pp. 351-352
1876Champsosaurus brevicollis Cope pp. 352-353
1876Champsosaurus vaccinsulensis Cope p. 353
1881Champsosaurus australis Cope
1882Champsosaurus saponensis Cope
1882Champsosaurus puercensis Cope p. 195
1882Champsosaurus saponensis Cope p. 196
1887Champsosaurus Baur p. 100
1902Champsosaurus annectens Lambe p. 45
1933Champsosaurus inflatus Parks p. 131
1933Champsosaurus inelegans Parks p. 135
1956Champsosaurus Russell p. 4
1964Champsosaurus Estes p. 99
1970Champsosaurus Estes and Berberian p. 4
1972Champsosaurus Erickson p. 8
1976Champsosaurus Estes p. 507
1981Champsosaurus Erickson
1988Champsosaurus Carroll
1990Champsosaurus Evans
1991Champsosaurus Evans
1993Champsosaurus Cvancara and Hoganson p. 15
1993Champsosaurus profundus Cvancara and Hoganson p. 15
1998Champsosaurus Gao and Fox p. 315
2001Champsosaurus Peng et al. p. 32
2005Champsosaurus Gao and Fox p. 439
2007Champsosaurus Matsumoto et al. p. 342
2010Champsosaurus Matsumoto and Evans
2013Champsosaurus Matsumoto et al.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
Gnathostomata()
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
RankNameAuthor
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Choristodera()
suborderNeochoristoderaEvans and Hecht 1993
genusChampsosaurus

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
K. -Q. Gao and R. C. Fox 1998Champsosaurus can be diagnosed by a suite of derived character states as follows: great elongation of snouth, exceeding 1/2 of skull length; interorbital width narrower than diameter of orbit; lacrimal strongly reduced to small triangle; postorbital excluded from formation of orbit; premaxilla/vomer contact lost; internarial present; choanae in posterior portion, in correspondence with elongation of vomer; interpterygoid foramen small, enclosed both anteriorly and posteriorly by pterygoids and located near posterior border of suborbital fenestra; suborbital fenestra shortened and kidney-shaped pterygoid/parasphenoid articulation fused; craniomandibular joint anterior to level of occipital condyle; neomorph forming most of ventral border of posttemporal fenestra; paraoccipital process strongly deflected ventrally; basal tubera of basisphenoid expanded posteroventrally and wing-like; elongation of mandibular symphysis to over 1/2 of length of tooth row; splenial strongly intervening in mandibular symphysis.