The Antetonitrus was a 8 to 10 metres long Herbivore that was found in the Orange Free State of Africa, at the Lower Elliot Formation. This was in 1981 by Kitching. The Antetonitrus was only found as a partial skeleton as not a whole species has been found before. The findings were a cervical centrum, four dorsal vertebrae, sacral vertebra, caudal vertebrae, dorsal ribs, chevrons, scapulae, right humerus, both ulnae, and more. The dinosaur could have weighed close to 2 tons, and was very large of its time existance (Triassic Period). This was because it did have certain aspects of its body that was the same as the Sauropod family. There also were features of a primitive dinosaur as well. The is only one known species which is A. ingenipes.

The fossils were stored in the Bernard Price Institute and originally labeled as a Euskelosaurus. Several years later it was found to not be that, and, in fact, a totally unique and new dinosaur in which they named it Antetonitrus.