摘要
观察到以前描述的中国兔猴不同种的特征在禄丰的全部中国兔猴标本中交叉地存在、并通过连续的中间表现型而衔接,本文建议石灰坝中国兔猴是厚齿中国兔候的同种异名,因而前一名称应予取消。以犬齿和下第四前臼齿为材料研究了中国兔猴的两性差别。本文使用双变量分布确定两性重叠分布的测量性状的性别差异取得较好的效果。
The diagnostic characters of the two species in Sinoadapis described previously in Lufeng specimens have been observed to be continuous through transitional phenotypes and the com-binations of characters of the two species exist in some specimens. These characters are hereby not of taxonomic value but variations within a single species. Therefore, Sinoadapis shihui-baensis is considered to be a synonym of Sinoadapis carnosus and should be sunk. Sinoadapis in Lufeng is treated as a genus of single species.
The diagnostic characters which distinguish Sivaladapis from Indraloris from the Siwaliks of India and Pakistan are analogous to those for distinguishing the two 'species' of Sinoadapis. It is believed that the 'gap' between the two genera would be filled by specimens which have not been discovered yet. It is probable that they may be a synonymous genus or even species.
The distributions of each dimension of upper and lower canines in Sinoadapis are se-xually non-overlapping with the exception of upper canine breadth probably due to the small sample size. Consequently, the canine specimens are easily sexed. As a measure of canine size dimorphism, the male/female ratio for a single dimension is determined to be 1.2.
Unlike the canines, the distributions of each dimension of the lower 4th premolars are sexully overlapping or sexully non-discriminating, Nevertheless, the bi-dimensional distribution of length and breadth of the teeth reveals to some extent the existence of two clusters with few intermediates in the area of both means in sexually pooled sample. The concentrations repre-sent the male and female averages of the measurements concerned respectively. The size di-morphism of the lower 4th premolars estimated by this way has a ratio of 1.08. If this ratio is representative of the extent of generalized body dimorphism in one dimension, the male/fe-male ratio of body weight might be estimated to be 1.26, or 8kg for male average and 6.4kg for female average.
出处
《人类学学报》
1988年第1期1-8,共8页
Acta Anthropologica Sinica
关键词
厚齿中国兔猴
石灰坝中国兔猴
两性差别
性别判断
Sinoadapis carnosus
Sinoadapis shihuibaensis
Sexual dimorphism
Sexual discriminating
