Trogonophidae

Trogonophidae (Palearctic worm lizards or desert ringed lizards) is a small family of amphisbaenians, containing five species in four genera.

Geographic range
Trogonophids are found in North Africa, the Horn of Africa, the Arabian Peninsula, and western Iran.

Description
Trogonophids are limbless, carnivorous, lizard-like reptiles highly modified for burrowing. They construct their tunnels with an oscillating motion that forces soil into the walls. Unlike other amphisbaenians, their teeth are fused to their jaws, rather than lying in a groove.

Genera
The following four genera are recognized as being valid.
 * Agamodon W. Peters, 1882 (three species)
 * Diplometopon Nikolskii, 1907 (monotypic)
 * Pachycalamus Günther, 1881 (monotypic)
 * Trogonophis Kaup, 1830 (monotypic)