Rather than a small dinosaur that relied on gimmicks such as venom and a neck frill to subdue its prey, Dilophosaurus was a powerful predator and one of the largest land animals in North America when it lived during the early Jurassic period, which lasted from about 201 to 174 million years ago. Now, the new analysis includes two previously unstudied fossil specimens from Arizona, providing the first clear picture of what Dilophosaurus was like in life.
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