Sympatric distribution of the two morphological types of the common tree shrew in Hat-Yai districts (South Thailand)

The two color types (grayish northern and reddish southern types) bf the co mmon tree shrew (Tupaia glis and Tupaia belangeri) were co-distributed in H at-Yai region (South Thailand). Although the Isthmus of Kra in South Thaila nd has been considered as distribution barrier of the two types, the sympat ric distribution of both types was confirmed in southern side of the Isthmu s. In the principal component analysis, the skull measurement character fro m Hat-Yai region could also be separated into the northern and southern gro ups according to the skin color identification of corresponding individuals . We could generally distinguish the common tree shrew into two types by sk ull morphology as well as external skin color.