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Anguidae is a large and diverse family of lizards native to the northern hemisphere. The group includes the slowworms, glass lizards, and alligator lizards, among others. Anguidae is divided into three subfamilies and contains 94 species in eight genera. They have hard osteoderms beneath their scales, and many of the species have reduced or absent limbs, giving them a snake-like appearance, although others are fully limbed.