26 March 2014
As stated in the paper, if one had time or reason to read it yesterday, the weight bearing axis of the hindfeet and hindlimb of Aardonyx exhibits a shift to the medial aspect of the foot. Additionally, the femur of Aardonyx exhibited a more straightened shaft than in previous bipedal members of sauropodmorpha. Femoral shape, weight bearing axis, and a slower gait are all indicative of quadrupedalism, and Aardonyx was in the transitional placement in the three categories, making it slightly faster than later relatives with a convex femoral shaft and bearing the weight less in the medial aspect of the feet. Also, the humerus was notably shorter than the femur rather than of equal length; another important trait in quadrupedal dinosaurs is the near-equal length of femur and humerus.