The bones of this primitive dinosaur were first discovered in 1991, by University of San Juan paleontologist Ricardo Martínez, during field work conducted by the University of Chicago and the University of San Juan. The 展开

In 1993 Paul Sereno and his colleagues described and named Eoraptor, and determined it to be one of the earliest dinosaurs. Its age was determined by several factors, not least because it lacked the specialized features of any of the major groups of later … 展开

Eoraptor is thought to have been an omnivore, although its dentition is quite similar to that of Buriolestes, which is considered carnivorous. It … 展开

• Media related to Eoraptor at Wikimedia Commons
• Data related to Eoraptor at Wikispecies
• Paul Sereno's paleontology website
• Paleobiology Database entry 展开

Eoraptor was a small dinosaur, with the known specimens measuring 1.2–1.3 m (3.9–4.3 ft) in length, and weighing around or less than 10 kg (22 lb). It had a lightly built skull with a slightly enlarged external naris. As in early sauropodomorphs such as 展开

During the Late Triassic period, the Ischigualasto Formation was a volcanically active floodplain covered by forests, with a warm and humid climate, … 展开