关键词: 啮齿类, 区系分布, 古北界, 东洋界

Abstract: The authors made an approach on rodents faunal distribution and composition in southern part of Anhui Province and Dabieshan hillyland through analytical comparision of dominant species, common species and local peculiar species in the areas with the aim to describe the boundary of Palaearctic realm and Oriental realm. A total number of 16 species were observed in Dabieshan hillyland,of which 8 species are Palaearctic realm ones,6 species are Oriental realm ones and 2 species are widely spread species. There are 4 dominant species in this area, which are made up by 3 Palaearctic realm species and 1 widely spread species, In the southern part of Anhui Province 21 species were found with the following composition:Palaearctic realm species 6, Oriental realm species 13, widely spread species 2.There are 5 dominant species in this area, of which 3 belong to Oriental realm while the other two belong to Palaearctic realm and widely spread species respectively.With this result of findings, the authors hold that Palaearctic species is dominant in Dabieshan hilly land, which is situated north of the Yangtze River though a clear sign of transition in faunal distribution was observed. For the southern part of Anhui-situated south of Yangtze River, Oriental realm species were found to be dominant.Thus we regard the Yangtze River in Anhui Province as the boundary of Palaearctic realm and Oriental realm in this province.