; the frontal bone is less sloped and the dental arcade smaller than that of the australopithecines ; the face is more orthognatic ( less protrusive ) than either the australopithecines or `` H. habilis '' , with large brow-ridges and less prominent zygomata ( cheekbones ) .
This overlaps that of `` H. sapiens '' : the frontal bone is less sloped and the dental arcade smaller than in australopithecines . The face is more vertical ( less protrusive ) than either the australopithecines or `` H. habilis '' , with large brow-ridges and less prominent cheekbones .