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Ctenochelys (meaning "comb tortoise") is an extinct genus of marine turtle (Cryptodira , Pancheloniidae ), which existed during the Cretaceous period, and lived in the shallow waters of the Western Interior Seaway .[1] Its fossils have been found in the Ripley Formation and Mooreville Chalk of central Alabama , United States.[2] It was first named by C. H. Sternberg in 1904,[3] and contains two species, C. stenoporus [4] and C. acris .[5]
Species
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Ctenochelys stenoporus skeletons
Ctenochelys stenoporus is the type species . It was originally thought to be a species of Toxochelys ; T. bauri , until Sternberg declared it a separate genus.[3] The two genera are similar in carapaces .[1]
Ctenochelys acris was first named by Zangerl in 1953 and is now thought to be one of the earliest ancestors of modern cheloniids .[6]
Phylogeny
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Ctenochelys in a cladogram from the analysis of Gentry et al., 2019:[7]
References
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^ a b "Marine Turtles" . Mike Everhart. 2004. Archived from the original on 2013-12-25. Retrieved 2008-07-01 .
^ Matzke AT (2007). "An almost complete juvenile specimen of the Cheloniid turtle Ctenochelys Stenoporus (Hay, 1905) From the Upper Cretaceous Niobrara formation of Kansas, USA" . Palaeontology . 50 (3 ): 669–91. doi :10.1111/j.1475-4983.2007.00650.x .
^ Zangerl R (1953). "The vertebrate fauna of the Selma Formation of Alabama. Part IV. The turtles of the family Toxochelyidae". Fieldiana Geology Memoirs : 137–277.
^ Gentry AD (2016). "New material of the Late Cretaceous marine turtle Ctenochelys acris Zangerl, 1953 and a phylogenetic reassessment of the 'toxochelyid'-grade taxa". Journal of Systematic Palaeontology . 15 (8 ): 675–696. doi :10.1080/14772019.2016.1217087 . S2CID 88758027 .
^ Andrew D. Gentry; Jun A. Ebersole; Caitlin R. Kiernan (2019). "Asmodochelys parhami , a new fossil marine turtle from the Campanian Demopolis Chalk and the stratigraphic congruence of competing marine turtle phylogenies" . Royal Society Open Science . 6 (12 ): Article ID 191950. Bibcode :2019RSOS....691950G . doi :10.1098/rsos.191950 . PMC 6936288 . PMID 31903219 .
External links
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t
e
R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=Ctenochelys&oldid=1228478612 "
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