The Saturnalia is known to be the oldest confirmed dinosaur to ever exist. It is a saurischian of a very old age. It walked the earth at around 227.5 million years ago.

Fossils were discovered in the Geopark of Paleorrota. This wis located in Sanga da Alemoa, Rio Grande do Sul, in Brazil. The first discovery in Brazil included a very nicely preserved, semi-articulated skeleton, including most of the presacral vertebral series, both sides of the pectoral girdle, right humerus, partial right ulna, both sides of the pelvic girdle with the sacral series, left femur and most the right hand limb.

Also, there was another discovery of a jaw and teeth were found as well.

This herbivore was described by Langer, Abdala, Richter, Benton in the year of 1999 and was then named Saturnalia.