in adult "endothiodons" the lower jaw teeth are pear shaped in cross section, compressed distolaterally, and has posterior serrated edges while the upper jaw teeth have anterior serrated edges. in the juveniles, the lower jaw is a lot smaller and more slender. the lower jaw contains one functional tooth row with 5-6 teeth. the teeth are small, conical, and pointed. the distal edge contains serrations that are just starting to appear. the juvenile teeth are much simpler and are more similar to that of a carnivore than an herbivore. it is possible that the different tooth morphology might be due to a change in diet from insectivorous or omnivorous as a juvenile to herbivorous as an adult. this would be achieved as size increases and it is more able to adapt to being herbivorous.