关键词: 演金丝猴, 毛耳猴, 藏酋猴, 下颌骨, 异速生长

Abstract: A detailed comparison of the mandible allometry in Rhinopithecus bieti，adult and juvenile Maeaca thibetana and Macaca mulatta lasiota is presented in this paper．After analyzing 33 variables of the mandibles including 10 specimens for each group afore-mentjoned，we find that there exist differences in growth patterns between the left and the right-side of the mandible, between any two variables and between any two groups. It indicates that although there may be morphological similarities because of convergence，the growth patterns may be different because of the differences in diet，feeding behaviour，phylogenetic and ontogenetic processes of these animals.

Key words: Mandible, allometry, Rhino Pithecus bieti, Macaea mutatta lasiota