Bipes is a genus of amphisbaenians (or worm lizards) found only in Mexico, the sole living member of the familyBipedidae.[2] They are carnivorous, burrowing reptiles, but unlike other species of amphisbaenians, they possess two stubby forelimbs placed far forward on the body.[3] They also retain an almost complete pectoral girdle.[4] The shovel-like limbs are used to scrape away soil while burrowing, in a manner similar to a mole.[5] Evidence for their occurrence in the United States is reviewed by Somma (1993).
Latreille PA (1801). In:Sonnini CS, Latreiile PA (1801). Histoire naturelle des reptiles, avec figures desinées d'après nature; Tome II. Premiere partie. Quadrupèdes et bipèdes ovipares. Paris: Crapalet. 332 pp. (Bipes, pp. 90–96.)
Taylor EH (1951). "Concerning Oligocene Amphisbaenid Reptiles". University of Kansas Science Bulletin34 (9): 521–579. (Bipedidae, p. 522.)