Name the 4 groups in which reptiles are included?

Types of reptiles:

Crocodilia - crocodiles, gharials, caimans, alligators (23 species)

Sphenodontia - tuataras (2 species)

Squamata - lizards, snakes, worm-lizards (amphisbaenids) (about 7,900 species)

Testudines - turtles, tortoises (over 300 species)