Coelophysis is a small carnivore from the Late Triassic and Early Jurassic epoch of North America and Africa. They were very slender and lightly built dinosaurs with long, S-shaped necks and short arms. Due to its body was very light, it was probably a fast dinosaur, being able to cover a lot of ground to scavenge for food. Coelophysis are believed to have lived in large packs; especially in drier seasons. Huge numbers of Coelophysis have been found together in several places in North America and Africa. There is a clear difference in sexual dimorphism; males were slight robust form while females were more gracile. Coelophysis lived in floodplains with clear variations in seasons.
North America and Africa
Upper Triassic to Lower Jurassic
Coelophysis kayentakatae was found in North America and fossils have been found in the southwestern USA. The species can be distinguished from the type species C. bauri by its small nasal crests and it was smaller in size. C. kayentakatae lived in an area of open sand dunes and small rivers, influenced by seasonal changes.
Rowe, T. (1989). A new species of the theropod dinosaur Syntarsus from the Early Jurassic Kayenta Formation of Arizona. Journal of Vertebrate Paleontology, 9(2), 125-136.