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Cteniogenys

Reptilia - Cteniogenyidae

Taxonomy

Cteniogenys was named by Gilmore (1928). It is not extant. Its type is Cteniogenys antiquus. It is the type genus of Cteniogenidae, Cteniogenyidae.

It was assigned to Sauria by Gilmore (1928) and Hay (1930); to Eolacertilia by Prothero and Estes (1980); to Kuehneosauridae by Estes (1983) and Carroll (1988); to Cteniogenidae by Gao and Fox (1998) and Foster and Trujillo (2000); to Choristodera by Ezcurra (2016); to Choristodera by Evans (1989), Evans (1990), Evans (1991), Matsumoto and Evans (2010), Matsumoto et al. (2013) and Matsumoto et al. (2019); and to Cteniogenyidae by Seiffert (1975) and Allain et al. (2022).

Species

C. antiquus (syn. C. reedi) (type species)

Synonymy list

Year	Name and author
1928	Cteniogenys Gilmore p. 162
1930	Cteniogenys Hay p. 256
1975	Cteniogenys Seiffert p. 14
1980	Cteniogenys Prothero and Estes p. 484
1983	Cteniogenys Estes
1988	Cteniogenys Carroll
1989	Cteniogenys Evans p. 586
1990	Cteniogenys Evans
1991	Cteniogenys Evans
1998	Cteniogenys Gao and Fox p. 306
2000	Cteniogenys Foster and Trujillo p. 14
2010	Cteniogenys Matsumoto and Evans
2013	Cteniogenys Matsumoto et al.
2016	Cteniogenys Ezcurra pp. 270, 282
2019	Cteniogenys Matsumoto et al.
2022	Cteniogenys Allain et al.

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria

Rank	Name	Author
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()
—	Eosuchia	()
—	Neodiapsida
—	Sauria	Gauthier 1984
—	Choristodera	()
family	Cteniogenyidae
genus	Cteniogenys

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.

G. †Cteniogenys Gilmore 1928

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†Cteniogenys antiquus Gilmore 1928

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Invalid names: Cteniogenys reedi Seiffert 1975 [synonym]

Diagnosis

Reference	Diagnosis
K. -Q. Gao and R. C. Fox 1998	Small choristoderes that differ from other members of the order by the following derived character states: contact between premaxillae and nasals lost; orbits significantly narrowed and elongated relative to skull dimensions; frontals subrectangular, anterior border of which retracted slightly posterior to anterior level of orbits; dorsal process of maxilla prominent, confined to anterior part of maxilla, and slightly inrolled dorsally; prefrontal short, widened, having elongate palatal process. The genus is further distinguished from mroe derived neochoristoderans in having separate postorbital and postfrontal, both entering orbital rim; quadrate with weakly developed quadratojugal process; marginal teeth short, with striated crowns; tooth bases having large replacement pits, but lacking basal plicidentine infolding.