Pisanosaurus might be the oldest known member of the ornithischian dinosaur group. It lived about 225 million years ago, in what is now Argentina. Scientists guess that it was probably a fast, two-legged runner.
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Pisanosaurus might be the oldest known member of the ornithischian dinosaur group. It lived about 225 million years ago, in what is now Argentina. Scientists guess that it was probably a fast, two-legged runner.