MASATO HATTORI / SCIENCE PHOTO LIBRARY MASATO HATTORI / SCIENCE PHOTO LIBRARY
Redondasaurus phytosaur, computer illustration. Phytosaurs were semiaquatic reptiles that lived during the Late Triassic period (around 230-200 million years ago) and resembled modern crocodilians. Redondasaurus lived in what is now the southwestern USA.
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