Wɔahunu nneɛma a ɛhyɛ mmoa a wɔnante wɔn nan mmienu so no nsow wɔ Australopithecus funu nkaeɛ a wɔatutu ahu no mu firi mfeɛ ɔpepem 4.2-3.9 a etwam nie, ɛmfa ho sɛ ɛbɛyɛ sɛ Sahelanthropus no firii aseɛ nantee wɔ wɔn nan mmienu soɔ bɛyɛ mfeɛ ɔpepem nson mmerɛ no mu no.