Greenfield L O
Department of Anthropology, Temple University, Philadelphia, Pennsylvania 19122.
Am J Phys Anthropol. 1990 Jun;82(2):135-43. doi: 10.1002/ajpa.1330820203.
The maxillary canines of Australopithecus afarensis show a distal wear facet that extends from the apex of the crown to a point near the distal cingulum. Although these facets bear a superficial resemblance to the honing facets found on the projecting portions of the canines of other anthropoids, a more detailed examination provided in this paper shows that they are not homologous or functionally equivalent. The facets are not related to the use of the maxillary canine as a weapon or as an additional masticatory surface. Instead, their presence in A. afarensis represented a blunting or dulling of the posterior edge of C so that its occlusion with P3 would be consistent with cheek tooth occlusion.
阿法南方古猿的上颌犬齿有一个远中磨损面，该磨损面从牙冠顶端延伸至远中边缘嵴附近的一点。尽管这些磨损面与其他类人猿犬齿突出部分上的磨蚀面表面相似，但本文提供的更详细检查表明，它们并非同源或功能等同。这些磨损面与将上颌犬齿用作武器或额外咀嚼面的用途无关。相反，它们在阿法南方古猿中的存在代表了C后缘的钝化，从而使其与P3的咬合与颊齿咬合一致。
