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Animals1 - dinosaurs These bipedal carnivorous dinosaurs...

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Animals One early archosaur was Euparkeria , a small, Triassic-aged, quadrupedal reptile that some scientists think may have been able to run short distances on its hind legs. Euparkeria specimens reach about 0.5 meters in length. The genus appears restricted to the Triassic of South Africa. Another archosaur, at one time considered a dinosaur, was Herrerasaurus , from the Triassic of Argentina. This animal marked the transition between the archosaur stem group and the derived dinosaurs. In all but a few characteristics Herrerasaurus is a dinosaur, although a smallish one of 3-4 meters in length and a body weight estimated at around 300 kg.. Eoraptor, from the same age and area, was another archosaur with a mosaic of dinosaurian and nondinosaurian characteristics. The Triassic saw the evolution of the first true dinosaurs, the ceratosaurians, or horned
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Unformatted text preview: dinosaurs. These bipedal, carnivorous dinosaurs have skeletons with a number of bird-like features. Famous members of this group include Dilophosaurus and Coelophysis . Both occur in Triassic deposits in the North American Painted Desert. Coelophysis and similar dinosaurs are known from other Triassic rocks throughout Pangaea. Unlike the specimen shown in the movie Jurassic Park , Dilophosaurus did not have a wide fringe nor is ther any evidence that it spit venom. But then, you know how movies are, right? Dilophosaurus was a slender 6-7 meters long dinosaur that weighed an estimated 300-400 kg. Coelophysis was less than 3 meters long and weighed a slight 15-30 kg....
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