Exhibits bony eyebrow ridges and a low sloping forehead, much like those of gorillas.
The small cranial capacity (about 410 cc) suggests Lucy's mental abilities were more like those of modern day apes than humans.
Jaws protrude out from the face, creating an elongated muzzle.
Jaws and teeth were large, suggesting her diet was comprised primarily of hard seeds and plants.
The foramen magnum is located closer to the center of the skull than a gorilla, but less so than humans. This indicates that Lucy would have had her head slightly jutting out in front of her back, making her center of balance slightly less comfortable for walking than for humans.