Between 1999 and 2003, a multidisciplinary team led by Sileshi Semaw discovered bones and teeth of nine A. ramidus individuals at As Duma in the Gona Western Margin of Ethiopia's Afar Region.
Između 1999. i 2003. godine, multidisciplinarni tim pod vodstvom Sileshija Semawa otkrio je kosti i zube devet jedinki vrste A. ramidus na zapadnoj granici Afarskog trokuta.