JOHN SIBBICK / SCIENCE PHOTO LIBRARY JOHN SIBBICK / SCIENCE PHOTO LIBRARY
Prosauropod dinosaur. Computer illustration of a prosauropod in a prehistoric landscape. Prosauropods (also known as plateosaurids) were sauropodomorphs (long-necked herbivorous dinosaurs) that existed 225 to 203 million years ago, during the Late Triassic period.
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