Eucoelophysis

Sullivan and Lucas 1999

Eucoelophysis is a genus of silesaurid dinosauriform from the Late Triassic (Norian) period Chinle Formation of New Mexico. It was assumed to be a coelophysid upon description, but a study by Nesbitt et al. found that it was actually a close relative of Silesaurus, which was independently supported by Ezcurra (2016), who found it to be the sister group to Dinosauria, and Silesaurus as the next most basal taxon.

Temporal range

Triassic

Jurassic

Cretaceous

Paleogene

Neogene

252 201 145 66 0 Ma

PBDB occurrences

Group

Dinosaures

Herbivore Ground dwelling, gregarious Terrestrial

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Life restoration of Diodorus scytobrachion. Based on the holotype remains[1] and those of more complete relatives.[2][3] External look based on inferences for basal dinosauromorphs[4] and the mythical mušḫuššu. © FunkMonk · CC BY-SA 3.0 · Wikimedia

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Classification

Dinosauria Unranked clade

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Ornithischia Unranked clade

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Parapredentata Unranked clade

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Silesauridae Unranked clade

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Sulcimentisauria Unranked clade

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Eucoelophysis Genus

Fossil sites 2 geolocated sites

Distribution

Top countries

🇺🇸 United States

Geological formations

Chinle

Temporal distribution

Rhaetian (205.7–201.4 Ma)

Norian (227.3–205.7 Ma)

Species (1)

Eucoelophysis baldwini 227 Ma

Bibliography

Original description

R. M. Sullivan and S. G. Lucas. 1999. Eucoelophysis baldwini, a new theropod dinosaur from the Upper Triassic of New Mexico, and the status of the original types of Coelophysis. Journal of Vertebrate Paleontology 19(1):81-90 DOI ↗

Bibliography (2)

L. F. Rinehart, S. G. Lucas, and A. B. Heckert, J. A. Spielmann, M. D. Celeskey. 2009. The paleobiology of Coelophysis bauri (Cope) from the Upper Triassic (Apachean) Whitaker quarry, New Mexico, with detailed analysis of a single quarry block. New Mexico Museum of Natural History and Science Bulletin 45:1-260