Australopithecus afarensis, Australopithecus africanus, Homo Neandertal, Homo habilis, Homo erectus?

Question

Unique differences in bone structure for each

Answer 1

So what they are all still Apes

Answer 2

Tough one.  

Afarensis, long curved fingers probably from living partially in trees

africanus: upright.  small brain.  long arms,

Neanderthal, continuous brow ridge, occipital bun.  large brain, very strong rounded bones.

Habilis: small brain, upright, high sexual dimorphism,

erectus: beetle brow.  moderate brain size, complete bipedal morphology.