†suborder Neochoristodera Evans and Hecht 1993 (choristodere)

Reptilia - Choristodera

Synonym: Champsosauriformes Hay 1929 [replaced name]

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

See also Gao and Fox 2005, Gao and Li 2007 and Matsumoto et al. 2007

Sister taxa: Cteniogenyidae, Cteniogenys, Hyphalosauridae, Hyphalosaurus, Irenosaurus, Khurendukhosaurus, Lazarussuchus, Monjurosuchidae, Monjurosuchus, Pachystropheus, Shokawa, Simoedosaurus

Subtaxa: Champsosauridae Champsosaurus Ikechosaurus Simoedosauridae Tchoiria

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Ecology:

Distribution:

• Paleocene of Canada (5: Alberta, Saskatchewan collections), France (2), United States (25: Montana, North Dakota, Utah, Wyoming)

• Cretaceous of Austria (1), Canada (94: Alberta, Nunavut, Saskatchewan), China (8), Japan (1), Mongolia (4), United States (100: Colorado, Montana, North Dakota, South Dakota, Texas, Utah, Wyoming)

Total: 240 collections including 249 occurrences

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