摘要
本文研究了菲氏叶猴牙齿与颅长的相关关系。其结果表明,较大的个体出现了相对小的门齿,而臼齿,特别是M_3的面积则随个体的增大而增大。这种结构与菲氏叶猴在摄取叶类食物过程中臼齿嚼磨起主要作用相关联。在整个食物嚼磨过程中,菲氏叶猴的下颌似乎主要作左右(颊—舌侧)方向运动。菲氏叶猴牙齿与个体大小的相关关系更接近于橄榄疣猴。
In order to research the relationship between tooth and body size in Phayre's leaf monkey, the distance from glabella to opisthocranion was chosen to represent the body size (Wood, 1979). The conclusions show that Phayre's leaf monkey incisors exhibit significant negative correlationship and allometry with increase of the body size. Molars, especially those in the mandibula, are isometry or nearly isometry with the increase of body size. These phenomena are tightly correlated with their feeding habits. That is, the diets in this kind of animal mostly include the leaves and seeds which make them to use the molars in chewing frequently (chew carefully and swallow slowly) the hard fibers. There is much correlated with the body size on the buccolingual distance than that on the mesiodistal distance because the allometry coefficients on the buccolingual distance are significant bigger than those on the mesiodistal distance. So we hypothesize when Phayre's leaf monkeys use molars to chew the leaves and seeds the movement usually happens in the direction from right to the left or from buccal to lingual direction. The relationship between the tooth and body size in Phayre's leaf monkeys is closer to that of Colobus guereza, than to the human. These show that in the evolutionary process, phylogeny and feeding habits, Phayre's leaf monkey is more closer to that of Colobus.
基金
国家自然基金
关键词
菲氏叶猴
牙齿
颅长
相关性
Phayre's leaf monkey (Presbytis phayrei), Tooth, Cranial length, Correlation, Allometry
