关键词: 短尾猴, 性二型, 下颔骨, 异速生长

Abstract: Eight variables of mandibular dimensions measured from the stump-tailed monkey were studied by univariate and multivariate analyses in order to estimate sexual dimorphism in this creature．ANOVA test showed that all of the variables are significant differences between sexes. The significant and very useful discriminators are condyle structare，i．e．width and lenght of the condyle．Two sexes are successful separated，the first diseriminat function based on condylar length and width(P＜0.001). The function is D=-11.013+1.151 Condyle +0.269 Condylm, When D=-1.271+0.182, individual will be discriminated as the female; when D=0.973+0.290, they as the male. If male has a longer mandibular length or resistance arn than female, another resistance arms are relatively shorted, But condylar strutcureis more developed than that of the female in order to obtain the more powerful masticatory froce. Relationship between mandibular length and other variables in stump-tailed monkey is more closer to that in rhesus monkey and in proboscis monkey, but a little far from that in the entellus monkey. This may be correlated with similar dietary category and between stump-taied and rhesus monkeys.

Key words: Maeaea aretoideas, exual dimorphism, Mandibula, Allometry