While the postcanines in non-mammalians, such as "Oligokyphus", are difficult to differentiate from canines, the lower postcanines of "Oligokyphus" (also considered to be pre-molars) are defining from other Tritylodonts. On lower postcanine teeth of Trityldonts, two cusps can be found per row; however, "Oligokyphus" have two rows with three cusps in each row. These cusps, specific to "Oligokyphus" Tritylodonts, allowed for a well-fitting bite that was particularly good at shredding plant material dense in fiber. The foremost incisors are similar to those of today's rodents, extremely intensified and enlarged. The typical location of canine teeth is left empty with "Oligokyphus". Instead, a gap is inserted in this area of the jaw as "Oligokyphus" lack the teeth commonly known as canines.