Coelophysus "hollow form"
Coelophysis was one of the oldest dinosaurs discovered. Coprolite, or fossilized poop, has helped scientist discover that Coelophysis practiced cannibalism, a behavior not uncommon in certain reptiles.
− Late Triassic, 225-220 million years ago
− United States
−Carnivorous, Herd
−6 feet tall, 10 feet long, 60-100 lbs