Saturnalia tupiniquim (Langer et al. 1999) Carnian, Late Triassic period, ~225 mya, 1.5 m in length, was one of the oldest true dinosaurs yet found. It was probably a basal sauropod, descended from a sister to Efraasia and Massospondylus.
The skull is poorly known, but it did have a large orbit, like Pantydraco , but more gracile.
More cervicals were present and each one was elongated, creating a much longer neck.
The scapula was narrow in the middle. The forelimbs were more robust with a large deltopectoral crest on the humerus.
The pelvis was more like that of Marasuchus. The hind limbs were more robust. The calcaneum did not have such a large tuber.