Jacobshagen B
Folia Primatol (Basel). 1979;32(1-2):29-34. doi: 10.1159/000155902.
The purpose of this study is to verify the subspecific level of the two recent refugial groups of Orang-utan on Borneo and Sumatra. A total of 47 skulls from both regions were studied by means of 32 craniometric characters. Univariate analysis showed highly significant differences only in males, whereas multivariate statistical analysis led to complete discrimination in both sexes. These results support the assumption that the geographically isolated Orang groups are subspecies.
本研究的目的是验证婆罗洲和苏门答腊岛上两个近期避难种群的红毛猩猩亚种水平。通过32个颅骨测量特征对来自这两个地区的47个头骨进行了研究。单变量分析仅显示雄性存在高度显著差异，而多变量统计分析则在两性中都实现了完全区分。这些结果支持了地理隔离的红毛猩猩种群是亚种的假设。
