Several hundred individuals, juvenile to adult, including nearly complete articulated skeletons. One of the earliest well-known dinosaurus, Coelophysis ("hollow form") was a flesheater, built like a large, slender bird, with a narrow, alomst stork-like head, an S-shapped neck, a slim body, and long, bird-like legs.

Some internal features were also bird-like, including hollow thinwalled bones, and the fusion of bones at the hips and spine, as well as those of the ankles and upper feet. Coelophysis was a very common little hunter of the Late Triassic. It came in two forms, 'robust' and 'gracile'. These are thought to represent the two sexes. 

The type specimen of Coelophysis bauri is a deficient specimen that preserves no diagnostic attributes beyond those of Theropoda ancestrally (Padian, 1986). However, im lieu of data to the contrary, we follow the convention of using this name for the large sample from Ghost Rance, New Mexico as well as material from Petrified Forest, National Park, Arizona. Several hundred individuals of Coelophysis bauri have now been recovered from the Ghost Ranch Quarry and they include a range of ontogenetic stages from young juveniles to adults of both robust and gracile morphs. However, even with this large sample Coelophysis, like Liliensternus, is yet undiagnosed.