Reptile scales

Reptile skin is covered with scutes or scales which, along with other characteristics, distinguish reptiles from animals of other classes (except fishes). The family Amphisbaenidae, which has naked skin, is the sole exception. Scales are made of keratin and are formed from the epidermis. They may be ossified or tubercular, as in the case of lizards, or modified elaborately, as in the case of snakes.