Pons J
Anthropol Anz. 1982;40(4):245-51.
This paper deals with racial differences in the a-b ridge count. From the data of 75 series it is found that the Whites and Blacks are showing only little variability. In White populations the a-b ridge counts vary between 80 and 86 ridges, in Black populations (having generally lower values) between 74 and 80. The series from the Indian subcontinent are characteristic by very low values and a great variability, which ranges between 68 and 80. High values and also a great variability were observed among American Indians (80-90). The hitherto known data for Mongoloid populations from Asia are insufficient for detailed evaluations.
本文探讨了a - b嵴纹计数的种族差异。从75个系列的数据中发现，白人和黑人的变异很小。在白人种群中，a - b嵴纹计数在80至86条嵴纹之间变化，在黑人种群中（通常数值较低）在74至80条之间。来自印度次大陆的系列数据的特点是数值非常低且变异很大，范围在68至80条之间。在美国印第安人中观察到高数值以及很大的变异性（80 - 90）。迄今为止，来自亚洲蒙古人种群体的已知数据不足以进行详细评估。
