 These forelimbs may have also functioned as digging tools, perhaps for roots and tubers.The length of the forelimb compared to the hindlimb suggests that "Heterodontosaurus" might have been partially quadrupedal, and the prominent olecranon process and hyperextendable digits of the forelimb are found in many quadrupeds.However, the manus is clearly designed for grasping, not weight support.