 "Adamantinasuchus"'s teeth seem to be quite well adapted for an omnivorous diet, since they are heterodont and have well-developed molariform teeth - it might, like "Chimaerasuchus," have included plants in its diet.There is insufficient preservation of the quadrate or the articular bones to tell whether its jaw was capable of back-and-forth movements necessary for chewing plants, but the relative lack of wear on its molariform teeth suggest that it was probably only capable of dorsoventral biting motions, not chewing, and that it mainly ate softer food than plants.The teeth were also wider laterally than anteroposteriorly, which might have made back-and-forth chewing motions difficult or impossible; it is therefore probable that "Adamantinasuchus" was mainly carnivorous or a scavenger of small corpses, since the incisiform and caniniform teeth would have been useful for seizing its prey or pulling strips of flesh off a carcass while the molariform teeth could have chewed it up.