The Turtles (Testudinata) - superorder

(Pappochelys)
- genera -extinct-

(Proganochelyidae)
- family -extinct-

(Australochelidae)
- family -extinct-

(Proterochersidae)
- family -extinct-
(Mesochelydia) - -extinct-

(Indochelyidae)
- family -extinct-

(Heckerochelyidae)
- family -extinct-
(Perichelydia) - -extinct-

(Chelycarapookidae)
- family -extinct-

(Sichuanchelyidae)
- family -extinct-

(Helochelydridae)
- family -extinct-
(Meiolaniformes) - -extinct-

(Trapalcochelys)
- genera -extinct-

(Chubutemys)
- genera -extinct-

(Peligrochelys)
- genera -extinct-

(Patagoniaemys)
- genera -extinct-

(Meiolaniidae)
- family -extinct-

(Otwayemyidae)
- family -extinct-
() -

(Kallokibotiidae)
- family -extinct-
(Testudines) - order
(Pleurodira) - suborder

(Apertotemporalidae)
- family -extinct-

(Platychelyidae)
- family -extinct-

(Dortokidae)
- family -extinct-

(Notoemyidae)
- family -extinct-
(Cheloides) - superfamily
The Austro-South American Side-Neck Turtles
(Chelidae)
- family
(Pelomedusoides) - superfamily

(Araripemydidae)
- family -extinct-
The African Sideneck Turtles
(Pelomedusidae)
- family

(Euraxemydidae)
- family -extinct-

(Bothremydidae)
- family -extinct-
The Madagascan Big-Headed & American Sideneck River Turtles
(Podocnemididae)
- family
(Cryptodira) - suborder
(Paracryptodira) - infraorder

(Pleurosternidae)
- family -extinct-

(Compsemyidae)
- family -extinct-

(Baenidae)
- family -extinct-
(Eucryptodira) - infraorder

(Macrobaenidae)
- family -extinct-

(Eurysternidae)
- family -extinct-

(Plesiochelyidae)
- family -extinct-

(Xinjiangchelyidae)
- family -extinct-
(Centrocryptodira) - -extinct-

(Osteopygidae)
- family -extinct-

(Sinemydidae)
- family -extinct-
(Polycryptodira) -
(Pantrionychia) -

(Adocidae)
- family -extinct-
(Trionychoidea) - superfamily
The Pignose Turtles
(Carettochelyidae)
- family
The Softshell Turtles
(Trionychidae)
- family
(Testudinoidea) - superfamily

(Haichemydidae)
- family -extinct-

(Lindholmemydidae)
- family -extinct-

(Sinochelyidae)
- family -extinct-
The Pond, Box, & Water Turtles
(Emydidae)
- family
The Asian River Turtles, Asian Leaf Turtles, Asian Box Turtles, & Roofed Turtles
(Geoemydidae)
- family
The True Tortoises
(Testudinidae)
- family
(Americhelydia) -
The Snapping Turtles
(Chelydridae)
- family
(Kinosternoidea) - superfamily
The River Turtles
(Dermatemydidae)
- family
The Mud Turtles
(Kinosternidae)
- family
The Sea Turtles (Chelonioidea) - superfamily

(Toxochelyidae)
- family -extinct-
The Green Sea Turtles & related
(Cheloniidae)
- family

(Thalassemydidae)
- family -extinct-
The Leatherback Sea Turtle & related
(Dermochelyidae)
- family

(Protostegidae)
- family -extinct-