Metrical dental analysis on golden monkey (Rhinopithecus roxellana) |
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Authors: | Ruliang Pan Charles Oxnard |
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Institution: | (1) Department of Anatomy and Human Biology, The University of Western Australia, Nedlands, 6907 Perth, Western, Australia, Australia;(2) Department of Systematic Zoology, Kunming Institute of Zoology, Kunming, Yunnan, China |
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Abstract: | Dental variation in the Chinese golden monkey (Rhinopithecus roxellana) is here evaluated by univariate, bivariate, and multivariate analyses. Allometric analyses indicate that canines and P3s
are positively, but other dimensions negatively scaled to mandible and maxilla, and to body size. With the exception of the
mesiodistal dimensions of I1 and M3, and the buccolingual dimension of P4, mandibular dental variables show similar scaling relative to body size. Analysis of residuals shows that males have significantly
larger canine, P3 and buccolingual dimensions of the postcanine teeth (M2 and M3) than females. A significant difference in shape between the sexes is found in the buccolingual dimension of the upper teeth,
but not in the mandible. Unlike the situation in some other species, female golden monkeys do not exhibit relatively larger
postcanine teeth than males. In fact, the reverse is true, expecially for M2s and M3s. The fact that most of the dental variables show low negative allometry to body size might be related a cold environment
that has led to the development of larger body size with reduced energy loss. When the raw data are examined by Discriminant
Function Analysis the sexes are clearly distinguishable. |
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Keywords: | Golden monkey Rhinopithecus roxellana Metrical dental analysis Sexual dimorphism Allometry Tooth and body size |
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