Modern Forms


Diapsids are represented today by over 15000 species. The Lepidosauria includes the single sphenodontid species, Sphenodon, and nearly 6000 species of lizards and snakes. Crocodilians and birds are archosaurs, represented by nearly 9000 species today.

Examples of the four living diapsid groups (from left): alligator (Crocodylomorpha); penguin (Aves); lizard and snake (Squamata)



Websites produced by students on the MSc Palaeobiology programme in the Department of Earth Sciences at the University of Bristol for academic year 2004-5