One location yielded Omo I, which includes part of a skull plus skeletal bones.Another site produced Omo II, which has more of a skull but no skeletal bones.Neither specimen has a complete face.

• 弗利格尔和他的同事通过考察化石出土地点，并利用更先进的时间测定仪器分析当地的地质结构和岩石标本，他们发现这些化石应该具有19.；5万年的历史。