JOHN SIBBICK / SCIENCE PHOTO LIBRARY JOHN SIBBICK / SCIENCE PHOTO LIBRARY
Estesia reptile anatomy and behaviour, illustration. This reptile lived during the Late Cretaceous (100 to 66 million years ago), with its fossils found in the Gobi Desert what is now Mongolia. It is related to the modern Gila monster. Two of the reptiles are scavenging a dead dinosaur at lower right. Details of the skull anatomy are at upper right, with an inset showing the sharp and recurved teeth. At upper left, an Estesia reptile is preying on the young of a horned dinosaur (Protoceratops).
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