The genus Oudenodon of A. G. Bain, 1856, was adopted by Sir Richard Owen, and defined as comprising Anoinodont reptiles of the type of Dicynodon, but absolutely toothless. Still, they were referred to a family Cryptodontia, under the belief that the teeth were immature and had their development arrested, so that they never descended to the adveolar margin. a transition might easily be made from the caniniform production upward of the alveolar border seen in Oudenodon to the small teeth in Dicynodon dubius and D. recurvidens, which areincontrast to the great lateral ridges formed by the roots of the teeth in most species of the genus.