Prosauria (extinct, except the tuatara).
Theromorpha (extinct).
Chelonia—Turtles; tortoises.
Dinosauria (extinct; dinosaurs).
Crocodilia—Crocodiles; alligators.
Plesiosauria (extinct).
Ichthyosauria (extinct; fish lizards).
Pterosauria (extinct; pterodactyls).
Pythonomorpha (extinct; mososaurs, etc.).
Sauria—Lizards; snakes.