Champsosaurus Cope 1876 (choristodere)

Reptilia - Choristodera

Full reference: E. D. Cope. 1876. On some extinct reptiles and Batrachia from the Judith River and Fox Hills Beds of Montana. Proceedings of the Academy of Natural Sciences of Philadelphia 28:340-359

Parent taxon: Neochoristodera according to R. Matsumoto et al. 2013

See also Baur 1887, Carroll 1988, Cope 1876, Cvancara and Hoganson 1993, Erickson 1972, Erickson 1981, Estes 1964, Estes 1976, Estes and Berberian 1970, Evans 1990, Evans 1991, Gao and Fox 1998, Gao and Fox 2005, Matsumoto et al. 2007, Matsumoto and Evans 2010, Peng et al. 2001 and Russell 1956

Sister taxa: Champsosauridae, Ikechosaurus, Simoedosauridae, Tchoiria

Subtaxa: Champsosaurus albertensis Champsosaurus ambulator Champsosaurus annectens Champsosaurus australis Champsosaurus brevicollis Champsosaurus gigas Champsosaurus inelegans Champsosaurus inflatus Champsosaurus laramiensis Champsosaurus lindoei Champsosaurus natator Champsosaurus profundus Champsosaurus puercensis Champsosaurus saponensis Champsosaurus tenuis Champsosaurus vaccinsulensis

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Type: Champsosaurus annectens

Ecology: aquatic piscivore

Distribution:

• Paleocene of Canada (2: Alberta, Saskatchewan collections), France (2), United States (24: Montana, North Dakota, Utah, Wyoming)

• Cretaceous of Canada (89: Alberta, Nunavut, Saskatchewan), United States (93: Colorado, Montana, North Dakota, South Dakota, Texas, Wyoming)

Total: 210 collections including 215 occurrences

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