Kieser J A, Preston C B
Am J Phys Anthropol. 1981 Aug;55(4):485-90. doi: 10.1002/ajpa.1330550409.
The crown morphology of 202 dental casts from living Lengua Indians is described and compared with other Amerind, Melanesian, and Caucasoid samples. The Lengua dentition shows a high Mongoloid component with little effects of possible European admixture, thus supporting the theory that despite early Franciscan and Jesuit attempts at missionization, much of the Paraguayan Chaco has remained genetically and culturally relatively intact well into the present century. A finding of note was the apparent sexual dimorphism of the Carabelli cusp, which questions earlier assumptions that no correction for sex need be made in population studies when dealing with this trait. Since mandibular canines show proportionately less wear in the canine distal accessory ridge area than maxillary canines, the value of the incidence of this trait in population and microevolutionary studies is questioned.
描述了来自在世的伦瓜印第安人的202个牙模的牙冠形态，并与其他美洲印第安人、美拉尼西亚人和高加索人种样本进行了比较。伦瓜人的牙列显示出高度的蒙古人种特征，几乎没有受到可能的欧洲人混合的影响，因此支持了这样一种理论，即尽管早期方济各会和耶稣会进行了传教努力，但直到本世纪，巴拉圭查科的大部分地区在基因和文化上仍相对完整。一个值得注意的发现是卡巴列利尖明显的性别二态性，这对早期的假设提出了质疑，即在群体研究中处理这一特征时无需对性别进行校正。由于下颌尖牙在尖牙远中副嵴区域的磨损比例比上颌尖牙小，因此该特征在群体和微进化研究中的发生率的价值受到质疑。
