Temporal range: Late Cretaceous–Eocene
|C. natator skeleton|
Champsosaurus resembled a gharial and, like gharials, hunted in rivers and swamps, catching fish with its long, tooth-lined jaws. It probably swam with lateral body movements, pinning its limbs against its body to increase its streamline, just like crocodiles and the Marine Iguana. Behind the eyes Champsosaurus's skull was very wide as powerful jaw muscles were attached here.
Its fossils have been found in North America (Alberta, Saskatchewan, Montana, New Mexico, Texas, and Wyoming) and Europe (Belgium and France), dating from the Upper Cretaceous to the mid Eocene. Its name means "crocodile lizard"; "Champso-" was taken from an Ancient Greek author's statement that "The Egyptians call the crocodiles χαμψαι [champsae]."
- D.Lambert, D.Naish and E.Wyse 2001, "Encyclopedia of Dinosaurs and prehistoric life", p. 77, Dorling Kindersley Limited, London. ISBN 0-7513-0955-9
- Lambert, et al. (2001).
- Lehman, T.M., and Barnes, K., 2010, Champsosaurus (Diapsida: Choristodera) from the Paleocene of West Texas: paleoclimatic implications: Journal of Paleontology, v. 84, p. 341-345. Retrieved 20 September 2010.
- Lehman and Barnes (2010).
- Tanke, D.H. and Brett-Surman, M.K. 2001. Evidence of Hatchling and Nestling-Size Hadrosaurs (Reptilia:Ornithischia) from Dinosaur Provincial Park (Dinosaur Park Formation: Campanian), Alberta, Canada. pp. 206-218. In: Mesozoic Vertebrate Life—New Research Inspired by the Paleontology of Philip J. Currie. Edited by D.H. Tanke and K. Carpenter. Indiana University Press: Bloomington. xviii + 577 pp.
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