Learn about this fish-like reptile's distinctive features, how it got around, what it ate, and where its fossils have been discovered.

View a drawing and read an overview of the physical and social characteristics of this extinct carnivorous reptile from the Triassic period.

Concise virtual encyclopedia provides an overview of this extinct reptile that had a dorsal fin and lived during the Permian period.

Profile of this extinct reptile includes a physical description, and details on its time period.

Profile of the ocean-going Ichthyosaurs includes details on their era, appearance, and propulsion systems. Link to related resources.

Concise reference entry describes the prehistoric carnivorous dinosaur which dwelled in the seas.

Learn about the extinct reptile also called pterodactyl with this guide which describes its anatomy and size. Read about the fossil findings.

Learn about this prehistoric reptile, called Sarcosuchus imperator, which lived 110 million years ago and was as long as a city bus.

Learn about the different types of pelycosaurs, including Dimetrodon and Edaphosaurus.

Encyclopedia Smithsonian provides a list of references on endangered, threatened, and recently extinct species of reptiles and amphibians.

Article offers photos, links, and scientific facts about the evolution of diapsids, all of which are members of the group Reptilia.