However, between the sixth and seventh alveoli this even spacing is interrupted by a dentary tooth of the lower jaw that interlocks with the upper dentition and creates a prominent notch in the maxilla. Based on the known remains, Trilophosuchus shows a high degree of festooning, meaning the maxillae are distinctly wave-like in their form, visible in both side and top view.
The first wave of the maxilla peaks with what is thought to be the fifth maxillary tooth before ascending to the level of the dentary notch. A second wave is present behind this one, peaking around the 11th or 12th tooth.