Geographical variations of tree shrews, mouse deers and pangolins around the lsthmus of Kra

研究了泰国南部克拉地峡的动物地理意义。以树鼩、鼠鹿和穿山甲为研究对象进行了骨测量和遗传研究。在泰国南部Hat-Yai地区，常见树鼩（Tupaia glis和Tupaia belangeri）的两种颜色类型（北部偏灰色和南部偏红色）共同分布。虽然泰国南部的克拉地峡一直被认为是两种类型的分布屏障，但在地峡南侧证实了两种类型的同域分布。在主成分分析中，根据不同人种的肤色特征，可以将Hat-Yai地区的颅骨测量特征划分为北方和南方人种。小鼠鹿和马来亚穿山甲也可以从骨测量结果中划分为两个地理类群。在DNA序列分析和核生物学研究中，也将常见的树鼩复合体区分为克拉地峡周围的两种变异。我们将进一步明确克拉地峡周围的鼠鹿和穿山甲的遗传分离，以及野猪和熊的遗传分离，为克拉地峡的动物地理评价做出贡献。

We examined zoogeographical significance of the Isthmus of Kra in the southern part of Thailand. The tree shrews, the mouse deers and the pangolins were used for the osteometrical and the genetic studies. In the tree shrews, The two color types (grayish northern and reddish southem types) of the common tree shrew (Tupaia glis and Tupaia belangeri) were co-distributed in Hat-Yai region (South Thailand). Although the Isthmus of Kra in South Thailand has been considered as distribution barrier of the two types, the sympatric distribution of both types was confirmed in southem side of the Isthmus. In the principal component analysis, the skull measurement character from Hat-Yai region could also be separated into the northem and southem groups according to the skin color identification of corresponding individuals. The lesser mouse deer and the Malayan pangolin could be also separated into two geographical groups around Hat-Yai region from the osteometrical results. In the DNA sequence analysis and the karyological studies, the common tree shrew complex was also distinguished into the two variations around the Isthmus of Kra. We will clarify the genetic separation in the mouse deers and pangolins around the Isthmus of Kra, and the wild pigs and bears will be contribute to the zoogeographical evaluation of the Isthmus of Kra in the future.