STEPHEN J. KRASEMANN / SCIENCE PHOTO LIBRARY STEPHEN J. KRASEMANN / SCIENCE PHOTO LIBRARY
Skeleton of Champsosaurus natator, an extinct crocodile-like reptile belonging to the genus Champsosaurus of the order Choristodera. Champsosaurus natator was two meters long and lived 75 million years ago (the Late Cretaceous) in Alberta. Dinosaur Provincial Park, Alberta, Canada.
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