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Snapping Turtle, North America. Halliday & Alder 2004

The Anapsida are amniotes (egg producers) - members of the class Reptilia, along with the other subclasses Synapsida and Diapsida. They are primarily characterised by the lack of temporal fenestrae (hole(s) behind the eye socket) in the skull. They originated by the lower Permian 270 million years ago, and have persisted to the present day through their one remaining representative group, the order Chelonia - the turtles.

Snapping turtle, North America. Halliday & Adler 2004

Author: Sarah King
Last updated: 18/11/06
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Websites produced by students on the MSc Palaeobiology programme in the Department of Earth Sciences at the University of Bristol for academic year 2006-7