 There were three premaxillary teeth.In the Early Jurassic "Abrictosaurus", "Heterodontosaurus", and "Lycorhinus", the first two premaxillary teeth were small and conical, while the much larger third tooth resembled the canines of carnivoran mammals and is often called the caniniform or 'tusk'.A lower caniniform, larger than the upper, took the first position in the dentary and was accommodated by the arched diastema of the upper jaw when the mouth was closed.