STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Iguanid reptile jaw fossil. Coloured scanning electron micrograph (SEM) of part of a fossilised jaw from an iguanid reptile. The Iguania are a suborder of the Squamata (snakes and lizards) that contains the iguanas, chameleons, agamids, and New World lizards, such as anoles and phrynosomatids. The group has a fossil record that extends back to the Early Jurassic about 190 million years ago. Magnification: x20 at 10cm wide.
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