The family Xenosauridae, commonly known as knob-scaled lizards, belongs to the order Squamata, which includes lizards and snakes. This small family of lizards is native to Mexico and Central America and is characterized by their distinctive, bumpy, keeled scales that give them a rough, armored appearance. Xenosaurids are primarily terrestrial and secretive, often inhabiting rocky crevices or forested areas. They are carnivorous, feeding on insects, small invertebrates, and occasionally small vertebrates. Despite their limited diversity, knob-scaled lizards are of particular interest to herpetologists due to their unique morphology and ecological adaptations within the Squamata.