JOSE ANTONIO PENAS / SCIENCE PHOTO LIBRARY JOSE ANTONIO PENAS / SCIENCE PHOTO LIBRARY
Volaticotherium prehistoric gliding mammal, illustration. This extinct insectivorous mammal (Volaticotherium antiquum) lived during the Jurassic, around 164 million years ago. Its fossils have been found in Inner Mongolia, China. It was similar to the modern flying squirrel.
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