Turtle Classification Chart
Kingdom Animalia  
Phylum Chordata Animals with a backbone
Class Reptilia Snakes, lizards, crocodiles, and turtles.

Reptiles are cold-blooded animals with a backbone who breathe air with lungs. All reptiles have scaly skin that prevents them from drying out. Most lay eggs.
Order Testudines All turtles and tortoises.

There are three suborders:

Pleurodira includes side-necked turtles;

Cryptodira includes all other living species of turtles and tortoises;

Amphichelydia includes all extinct species.
Suborder Cryptodira The freshwater turtles, snapping turtles, tortoises, soft-shelled turtles and sea turtles.
Family Cheloniidae or Dermochelyidae There are two families of sea turtles.

Family Cheloniidae includes sea turtles whose shells are covered with scutes (horny plates).

Family Dermochelyidae includes sea turtles whose shells are instead covered with leathery skin. There is only one extant species in this family, the leatherback turtle.
Genus and Species

Caretta caretta

Chelonia mydas

Natator depressus

Eretmochelys imbricata

Chelonia mydas

Lepidochelys olivaces

Lepidochelys kempii

Dermochelys coricea

Loggerhead

Green

Flatback

Hawksbill

Black

Olive ridley

Kemp's ridley

Leatherback