Discovery of micromammalian fauna of Sichuan-Guizhou Area in Lantian, Shaanxi

The study of the Xishuidong micromammalian fauna, found from Lantian, Shaanxi Province, indicates that both the northern slope of the Qinling Mountains and Sichuan-Guizhou area must belong to the same Oriental Realm in middle-late Middle Pleistocene. The age of the Xishuidong fauna should be later than that of the Gongwangling fauna, and even a little later than that of the Zhongjiawo fauna in age. The fauna is related not only to that of layers 9 and 8 of Peking Man locality in northern China, but also to the micromammals from Hexian Man Locality in southern China.