Sergi (1911) established Notanthropus eurafricanus archaicus based on specimens from Galley-Hill, Brunn, Egisheim and Predmost.
Campbell (1965) fixed Predmost XXI, as described in Matiegka (1938) as the lectotype and noted that most specimens from Predmost were destroyed in 1944.
Campbell (1965) contains a misspelling, showing "archaius" instead of "archaicus", as it appears in Sergi (1911). This typographical error continues through in Groves (1989).
