) In contrast, early members of the genus Homo, which descended from the gracile australopithecines, had much smaller faces, more delicate jaws, smaller molars and no sagittal crests— despite being far larger in terms of overa )是,从纤细南猿演化来的早期人属物种,虽然体型比南猿大多了,面孔却小得多、下颚比较娇弱、齿较小,而且没有矢状脊。