"Crocodylus" affinis

"Crocodylus" affinis
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Crocodilia
Superfamily:	Crocodyloidea
Genus:	Incertae sedis
Species:	†"C." affinis
Binomial name
	†"Crocodylus" affinis; Marsh, 1871
Synonyms
	†Crocodylus clavis Cope, 1883; †Brachyuranochampsa zangerli Mook, 1962;

"Crocodylus" affinis is an extinct species of crocodyloid from the Eocene of Wyoming. Fossils were first described from the Bridger Formation by American paleontologist Othniel Charles Marsh in 1871. Marsh described the species, along with every other species of crocodyloid in the Bridger Formation, under the genus Crocodylus.[1] The known specimen of "Crocodylus" affinis is a skull found at Grizzly Buttes, Wyoming, measuring 13 inches in length on the upper surface.[2] Recent phylogenetic studies of crocodyloids show that "C." affinis is not a species of Crocodylus, but a genus has not yet been erected to include the species. Other Bridger species such as Crocodylus clavis and Brachyuranochampsa zangerli have been synonymized with "C." affinis.[3][4]

The holotype skull of "Crocodylus" affinis (AMNH 6177) on display in the American Museum of Natural History

References

Mook, C.C. (1921). "Description of a skull of a Bridger crocodilian" (PDF). Bulletin of the American Museum of Natural History. 44 (11): 111–116.
Marsh, O. C. (1871). Notice of some new fossil reptiles from the Cretaceous and Tertiary formations. American Journal of Science, s3-1(6), 447–459. doi:10.2475/ajs.s3-1.6.447
de Buffrenil, V.; Buffetaut, E. (1981). "Skeletal growth lines in an Eocene crocodilian skull from Wyoming as an indicator of ontogenic age and paleoclimatic conditions". Journal of Vertebrate Paleontology. 1 (1): 57–65. doi:10.1080/02724634.1981.10011879.
Brochu, C. A. (2000). "Phylogenetic relationships and divergence timing of Crocodylus based on morphology and the fossil record". Copeia. 2000 (3): 657–673. doi:10.1643/0045-8511(2000)000[0657:pradto]2.0.co;2.

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[MCC21-1] Mook, C.C. (1921). "Description of a skull of a Bridger crocodilian" (PDF). Bulletin of the American Museum of Natural History. 44 (11): 111–116.

[2] Marsh, O. C. (1871). Notice of some new fossil reptiles from the Cretaceous and Tertiary formations. American Journal of Science, s3-1(6), 447–459. doi:10.2475/ajs.s3-1.6.447

[BB81-3] Buffrenil, V.; Buffetaut, E. (1981). "Skeletal growth lines in an Eocene crocodilian skull from Wyoming as an indicator of ontogenic age and paleoclimatic conditions". Journal of Vertebrate Paleontology. 1 (1): 57–65. doi:10.1080/02724634.1981.10011879.

[BCA00-4] Brochu, C. A. (2000). "Phylogenetic relationships and divergence timing of Crocodylus based on morphology and the fossil record". Copeia. 2000 (3): 657–673. doi:10.1643/0045-8511(2000)000[0657:pradto]2.0.co;2.