Diapsids

• Diapsid - Information from Wikipedia on this group of reptiles characterised by having two holes, the temporal fenestra, in their skulls.
• Diapsida - Information from the Tree of Life Web Project on this group of reptiles which includes lizards, Sphenodon, crocodylians, birds and their extinct relatives.
• Drepanosauridae - Information from Wikipedia on this family of reptiles from the late Triassic, characterized by their distinctive triangular skulls which resemble the skulls of birds.
• Drepanosaurus unguicaudatus - Provides information on this medium-sized reptile and its anatomy with several photographs of its fossilized remains.
• Endennasaurus - Information and a photograph of a well preserved specimen from northern Italy.
• Megalancosaurus - Photographs and information on this small diapsid reptile from the Late Triassic of Northern Italy.
• Mystriosuchus - Illustration of this crocodile-like diapsid from the Upper Triassic, its description and some photographs.
• Vallesaurus - Photograph of a complete specimen of this drepanosaurid reptile and its description.