The glenoid cavity of Lucy’s scapula, the surface of the scapula that articulates with the humerus to form the shoulder joint, faces more cranially/superiorly than in modern humans. A more superior orientation of the glenoid cavity is similar to the Chimpanzee morphology, and is a feature seen in many arboreal quadrupeds. Lucy’s retention of this trait suggests that she may have continued to practice suspensory behaviors while also being bipedal.