They are characterised by a relatively slight frame and comparatively refined skull (when compared to their ape contemporaries) with quite a large brain capacity for the time.
Zibonakaliswa ngokwakheka kancane futhi i-skull ehlanjululisiwe (uma kuqhathaniswa nama-api abo abaphila ngaso) enekhono elikhulu lobuchopho ngaleso sikhathi.