A. anamensis
Gracile, 4.0-4.2 mya [oldest]
A. afarensis
Gracile, 3.6-3.0 mya [second oldest]
A. africanus
Gracile, 3.0-3.2 mya {third oldest]
A. sediba
Gracile, 2 mya [youngest]
A. aethiopicus
Robust, 2.5 mya [oldest]
A. boisei
Robust, 2.3-1.2 mya [middle]
A. robustus
Robust, 2.0-1.5 mya [youngest]