Coelophysis bauri (Cope1889) Norian, Late Triassic ~210mya, 3 m in length, was derived from a sister to Marasuchus and phylogenetically preceded most of the other theropod dinosaurs, including Juravenator in the lineage of birds.
Distinct from Marasuchus, the skull of Coelophysis had a longer rostrum. The jawline retained the notch seen in Turfanosuchus and Trialestes. Anteriorly the mandible bent down slightly.
The cervicals were elongated along with the dorsals and caudals. Deep but gracile chevrons were present.
The ventral scapula and coracoid were smaller. Digits 4 and 5 were absent and the thumb joint was twisted slightly to enable a grasp.
The pelvis was elongated in every direction. The ilium has a larger anterior and posterior process. The pubis extended far anteroventrally and the ischium was likewise elongated. The hind limb was relatively shorter and the pes was smaller with more robust digits.