Compsemys

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Compsemys Temporal range: Late Cretaceous–Paleocene PreЄ Є O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Testudines
Suborder:	Cryptodira
Family:	Dermatemydidae ?
Genus:	Compsemys Leidy, 1856
Species:	C. victa
Binomial name
*Compsemys victa* Leidy, 1856

Compsemys is a genus of prehistoric turtles from the Late Cretaceous and Paleocene of North America. Although several species have been described, they are all considered synonyms of one species, C. victa, first described by Joseph Leidy in 1856.^[1] Its familial affinities are unclear,^[1] with recent authors favoring Dermatemydidae.^[2]

Compsemys was a moderately-sized turtle, up to 30 cm (12 in) long, with a carapace covered with raised, flattened tubercles, which are not seen in any other turtle. This allows even small shell fragments to be identified as Compsemys.^[3] The skull resembles that of the alligator turtle, with a sharply hooked beak; Compsemys must have been an aquatic carnivore.^[3]

References

↑ 1.0 1.1 Laurie J. Bryant (1989). "Systematic Paleontology". Non-dinosaurian lower vertebrates across the Cretaceous-Tertiary boundary in northeastern Montana. Volume 134 of University of California publications in geological sciences. University of California Press. pp. 10–58. ISBN 978-0-520-09735-3.
↑ Benjamin John Burger (2007). "A new Late Paleocene vertebrate fauna from the Ohio Creek Formation of western Colorado" (PDF). The Mountain Geologist 44 (3): 141–150.
↑ 3.0 3.1 Martin Jehle (April 1, 2006). "Turtles: Business as usual". Paleocene mammals of the world. Retrieved October 10, 2010.

v t e Extinct turtles

Triassic period	Odontochelys Proganochelys

Jurassic period	Basilochelys Caribemys Condorchelys Dinochelys Dorsetochelys Eileanchelys Eurysternum Hispaniachelys Kayentachelys Palaeomedusa Sinaspideretes Thalassemys Uluops

Cretaceous period	Allopleuron Angolachelys Anomalochelys Araripemys Archelon Bouiachelys Caririemys Cearachelys Chelosphargis Chupacabrachelys Compsemys Corsochelys Cratochelone Ctenochelys Desmatochelys Emarginachelys Foxemys Gigantatypus Gilmoremys Glyptops Jiangxichelys Kinkonychelys Kirgizemys Kurmademys Liaochelys Notochelone Ocepechelon Pappigerus Paracryptodira Patagoniaemys Polysternon Pleurosternon Prochelidella Protostega Pneumatoarthrus Sankuchemys Santanachelys Sinemys Terlinguachelys Toxochelys Trionyx kansaiensis

Paleogene and Neogene period	Acherontemys Allaeochelys Anosteira Arabemys Argillochelys Aurorachelys Baenidae Berruchelus Carbonemys Carolinochelys Cedrobaena Chelodina murrayi Chelydrops Chelydropsis Chisternon Colossochelys Cosmochelys Crossochelys Eochelone Eosphargis Euclastes Gamerabaena Glarichelys Hadrianus Hesperotestudo Hutchemys Itilochelys Kinosternon pojoaque Macrocephalochelys Manchurochelys Meiolania Meiolaniidae Mesodermochelys Mexichelys Miocaretta Niolamia Ninjemys Pacifichelys Palaeotrionyx Palatobaena Parahydraspis Peckemys Planiplastron Plesiobaena Procolpochelys Protochelydra Protosphargis Protostegidae Psephophorus Puppigerus Stupendemys Stylemys Syllomus Thalassochelys Warkalania

Recent	Cylindraspis species: Domed Mauritius giant tortoise Domed Rodrigues giant tortoise Réunion giant tortoise Saddle-backed Mauritius giant tortoise Saddle-backed Rodrigues giant tortoise Aldabrachelys abrupta Chelonoidis nigra abingdonii (Lonesome George)

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