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Herrerasaurus was about 10 to 20 feet (3 to 6 meters) in length, stood about 3½ feet (1 meter) tall at the hips, and weighed something in the region of 460 to 770 pounds (210 to 350 kilograms).
For many years, it was not entirely clear how to classify Herrerasaurus. There were several different theories about the animal, including that it may have been an early Theropod dinosaur, or that it may have been an early Sauropodomorph (the suborder containing Prosauropods and Sauropods), or perhaps that it was not even a dinosaur at all. However, a near-complete skeleton and skull was found in 1988, and as a result of this discovery, it is now widely thought to have been an early Theropod dinosaur.
Herrerasaurus was a carnivore (meat-eater) that lived about 228 million years ago
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