The most famous member of this species, Lucy, shows a ton of two-legged adaptations: A human-like foot, a short pelvis, and a femur that angles inward for a smoother stride.

这个物种最有名的成员，露西，表现出大量的两条腿适应表现：类似人类的脚短骨盆以及股骨向内倾斜以实现更平稳的步伐。