The Precise Biogeographic Division of Palaearctic and Oriental Realm in the East of China:Based on Data of Amphibians

China is often known for bestriding Palaearctic and Oriental biogeographic realm,but the precise division east of Qinling Mountain is not specific all the while.By using the data of amphibians distributed in 14 zoogeographical provinces in Henan,Anhui and Jiangsu (2 orders,10 families,17 genera,and 42 species),the similarity of species indicates that the division in those districts appears to be a transition zone:its northern border is along Qinling Mountain－Funiu Mountain－Huaihe river－the chief irrigation canal of North Jiangsu;its southern border is along Funiu Mountain－Tongbai-Dabie Mountain－foothill of South Huaihe－canal of Tong-Yang.The even accurate division in this area depends on the research of more taxa of animals,and on the large scale of deep scout.