This is the Order of the Scaled Reptiles and includes the suborders of Lizards, Snakes and Worm Lizards. Members of this order are noted for their skins which have shield-like, horny scales. They also have quadrate bones that move which allows them to move the upper jaw relative to the skull.
The order Squamata is divided into two separate suborders: Sauria (lizards) and Serpentes (snakes). There are about 6500 to 7000 species in the order.