California Biota Home Page....Animalia....Chordata....Vertebrata


Desert Tortoise...Desert Iguana....Chuckwalla....Western Fence Lizard....Gila Monster....Glossy Snake....Southern Pacific Rattlesnake...Western Diamondback Rattlesnake....Mojave Black-collared Lizard


The Reptilia includes an array of amniotic organisms that are clothed in scales. The various groups of reptiles also share a number osteological features inherited from a common ancestor.  Not all descendents of that common ancestor, however, are included in the Reptilia.  Birds, which share a common ancestry with therapod dinosaurs, are traditionally excluded from the Reptilia and placed in the class Aves. 
     The extant members of the Reptilia are divided into two subclasses, the Anapsida (which includes turtles and tortoises),  and the Romeriida (which includes all other living reptiles).   Representatives of both groups occur in California.