The Paleontology of North America

Extinct Marine Reptiles from North America

See images from the:

Plotosaurus bennisoni From the Cretaceous in California © 2004 UCMP	Shastasaurus pacificus From the Triassic in California © 2004 UCMP	Cymbospondylus From the Triassic in Nevada © 2003 Nevada State Museum, Carson City
Trinacromerum From the Cretaceous in Arizona © 2003 Dave Gillette, Museum of Northern Arizona	Tylosaurus proriger From the Cretaceous in Kansas © 2004 Michael Everhart	Shonisaurus popularis From the Triassic in Nevada © 2004 Maximo Salas