Classification

Turtles make up the order Chelonia.

make up the family Chelydridae. The common snapping turtle is Chelydra serpentina ; the alligator snapping turtle, Macroclemys temmincki.

make up the family Kinosternidae. Mud turtles are of the genus Kinosternon; musk turtles, Sternotherus.

make up the family Emydidae. Pond turtles are of the genus Clemmys; map turtles, Graptemys; painted turtles, Chrysemys; sliders and cooters, Pseudemys; box turtles, Terrapene. The diamondback terrapin is Malaclemys terrapin.

make up the family Trionychidae.

make up the family Chelonidae. The green turtle is Chelonia mydas; the flatback, C. depressa; the hawksbill, Eretmochelys imbricata; the loggerhead, Caretta caretta; the Atlantic ridley, Lepidochelys kempi; the Pacific ridley, L. olivacea.

is Dermochelys coriacea of the family Dermochelidae.

Land turtles make up the family Testudinidae. The Texas tortoise is Gopherus berlandieri; the desert tortoise, G. agassizi; the gopher tortoise, G. polyphemus; the Bolson tortoise, G. flavimarginatus. The giant tortoise of the Galápagos Islands is Geochelone elephantopus. Hinged-back tortoises are of the genus Kinixys. The pancake tortoise is Malacochcrsus tornieri.