Fleagle J G
Am J Phys Anthropol. 1977 Mar;46(2):297-307. doi: 10.1002/ajpa.1330460211.
Sympatric Malaysian leaf-monkeys, Presbytis obscura and Presbytis melalophos show quantitative differences in their use of different locomotor patterns during daily activities. P. obscura primarily moves quadrupedally along large boughs; P. melalophos relies more on leaping between smaller supports. P. melalophos also uses forelimb suspension more than does P. obscura. Comparison of the muscular anatomy of the shoulder, arm, trunk, hip and thigh show numerous statistically significant differences between the two species in relative mass of individual muscles and in details of muscular origin and insertion. In almost all instances these differences accord with the types of differences in muscular anatomy predictable from either biomechanical analyses of locomotor behavior or comparative anatomical studies of other mammalian species.
同域分布的马来西亚叶猴，即暗色叶猴（Presbytis obscura）和黑脊叶猴（Presbytis melalophos）在日常活动中对不同运动模式的使用存在数量上的差异。暗色叶猴主要沿着大树枝以四足方式移动；黑脊叶猴则更多地依赖在较小支撑物之间跳跃。黑脊叶猴使用前肢悬吊的频率也高于暗色叶猴。对肩部、手臂、躯干、臀部和大腿肌肉解剖结构的比较显示，这两个物种在个体肌肉的相对质量以及肌肉起止点的细节方面存在许多具有统计学意义的差异。几乎在所有情况下，这些差异都与从运动行为的生物力学分析或其他哺乳动物物种的比较解剖学研究中预测到的肌肉解剖结构差异类型一致。
