Herrerasaurus is a species of dinosaur that lived during the Late Triassic period. Its name comes from the discoverer, Victorino Herrera, who found the first fossils in Argentina in 1959. The scientific name for the Herrerasaurus is Herrerasaurus ischigualastensis. This dinosaur is classified as a theropod, meaning it was a carnivorous, bipedal dinosaur that walked on two legs. Synonyms for this species include Ischisaurus, Frenguellisaurus, Sanjuansaurus, and Chindesaurus. All of these names refer to similar species that were discovered in the same region during the same time period. The Herrerasaurus reigns as one of the earliest known dinosaurs, and its discovery has greatly contributed to our understanding of dinosaur evolution.