Takahashi L K
Department of Anthropology, University of Chicago, Ill.
Folia Primatol (Basel). 1990;54(1-2):70-85. doi: 10.1159/000156427.
Field and laboratory studies of arm-swinging in gibbons reveal its singularity even compared to spider monkeys. On the basis of principal components and discriminant analyses of size-corrected forelimb variables, this study confirms their morphological uniqueness and the more generalized nature of the spider monkey forelimb. Long forearms, well-developed scapular spines, and sagittally thicker radial shafts are features associated strictly with gibbon arm-swinging. On the other hand, large humeral heads, projecting medial epicondyles, and axially elongated scapulae, traditionally regarded as arm-swinging traits, are probably more important for climbing.
对长臂猿摆臂的野外和实验室研究表明，即使与蜘蛛猴相比，其摆臂方式也具有独特性。基于对大小校正后的前肢变量进行主成分分析和判别分析，本研究证实了它们在形态上的独特性以及蜘蛛猴前肢更为普遍的特征。前臂较长、肩胛冈发育良好以及桡骨干矢状面较厚是与长臂猿摆臂严格相关的特征。另一方面，传统上被视为摆臂特征的大肱骨头、突出的内侧髁以及轴向拉长的肩胛骨，可能对攀爬更为重要。
