短尾猴和猕猴距骨形态的研究

本文对短尾猴(Macaca arctoides)和(M．mulatta)猴猕的距骨形态进行了比较研究。结果表明,距骨的一些变量,如楔形指数距一腓骨连接面长、距骨颈长及总长在两种间存在明显差异。从距骨形态结构和多变量(三维空间模式)分析,短尾猴比猕猴具有更多的地上活动时间的可能性。

MORPHOLOGY OF THE TALUS IN STUMP-TAILED AND RHESUS MONKEYS

It is necessary to compare the morphology of the talus between Stump-tailed and Rhesus monkeys in order to understand the functional morphological differences between these two species．Some hypotheses have been made for locomotion and behavior existing in Stump-tailed and Rhesus monkeys． The specimens used we obtained from western Yunnan Province．China．where the two species usually distribute sympatrically and having no obvious differences in environments．They are very near species.and comparative morphology should be studied in order to get some detailed informations of their differences．In this paper,the comparative morphology of talus were studied and compared with Phaye's and Francoisi' leaf monkeys．The results show: even if she evidence of talus in Stump-tailed and Rhesus monkeys is equivocal as their environments and behavior are not different very much,it seems reasonable to conclude． that there are at least some differences．such as" wedging index”,fibular surface length and talar len- gth,they are different significantly both in size and shape,and of course in the functions of locomotion and behavior． As pointed out by some authors,talus is one of the important osteological features of the foot, acting as the joint and lever,moved by the crural extensor muscles of the leg and controllsd by the flexor muscles of the leg and tarsus．According to the three—dimensional model analysis on the talus and comparison with two leaf monkeys,we believe the Stump-tailed monkeys is more adapting to moving terrestrially than Rhesus monkey based on osteological features and functional morphology．