Efraasia diagnostica (Huene 1932, Galton 1973) Norian, Late Triassic ~ 218 mya, ~1.2 m snout/vent length was a plant eating dinosaur at the base of the sauropodomorpha. Derived from a sister to Pantydraco, Efraasia was ancestral to later prosauropods and sauropods, the largest of all land animals.
Distinct from the juvenile, Pantydraco, the skull was relatively smaller, the preorbital portion of the skull was longer and the orbit was relatively smaller, as in most adult sauropodomorphs. The ventral mandible was concave. The teeth were shorter and more numerous. The surangular was taller.
The cervicals were longer. Relative to Eoraptor, the manus included a very large digit 1 ungual and digit 2 was the longest. The pelvis was longer, the femur was shorter and the pedal digits were longer and more gracile. |
