 However, an "Australopithecus bahrelghazali" mandible was found in Chad by Mamelbaye Tomalta, Najia and Alain Beauvilain, Michel Brunet and Aladji H. E. Moutaye as early as 1995.With the sexual dimorphism known to have existed in early hominins, the difference between "Ardipithecus" and "Sahelanthropus" may not be large enough to warrant a separate species for the latter.