Ceratosaurus
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Ceratosaurus Temporal range: Upper Jurassic
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Genus: | †Ceratosaurus Marsh, 1884
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Ceratosaurus was a predatory dinosaur from the Upper Jurassic period, 156 to 145 million years ago. It had a large horn on its nose, and a pair of smaller horns in front of its eyes. Uniquely among theropods, Ceratosaurus had armor, in the form of small osteoderms running down the middle of its back.