Dubois (1921) established Homo wadjakensis with extensive description of remains from Wadjak, Indonesia includeing an adult cranium (Wadjak I) and a mandible (Wadjak II). The first fossil specimen was discovered in East Asia in 1888 by Mr. B.D. Van Rietschoten during marble prospecting mission. Remains given to Dubois who delayed publication till 1921.
Campbell (1965) listed the name as available and potentially valid, with the adult female cranium as the lectotype. Oakley, Campbell and Page (1975) listed Wadjak 1 skeleton as holotype.
Groves (1989 p. 291) listed Homo wadjakensis Dubois, 1921as an available junior subjective synonym of Homo sapiens cf. sapiens.