Saturnalia is a genus of very early saurischian dinosaur, from the Carnian faunal stage of the late Triassic period (227.4 to 220.7 million years ago), making it one of the oldest true dinosaurs yet found. It may have been a primitive sauropodomorph, a group which includes the giant sauropods. It probably grew to about 1.5 meters (5 ft) long. The few known remains of this genus have many prosauropod features, yet lack other characteristics shared by all dinosaurs.