Western Pond Turtle Subspecies
A:Extra triangular-shaped scutes on bridge (where upper & lower shells meet). Along west coast from Canada southward to San Francisco. Isolated population in western Nevada.
Northwestern Pond Turtle, Clemmys marmorata marmorata
B:No extra scutes. From San Francisco southward to Baja California.
Southwestern Pond Turtle, Clemmys marmorata pallida