歌乐山黄桷洞复齿鼯鼠化石研究

Trogopterus Heude from the Huangjue Cave in Gele Mountain,Chongqing

重庆歌乐山地区位于中国南方喀斯特地形的北缘,多溶洞和化石的发现。本文通过对歌乐山黄桷洞调查发现的复齿鼯鼠(Trogopterus Heude)标本进行鉴定与研究,并结合我国其他地点发现的复齿鼯鼠化石,探讨复齿鼯鼠在中国的起源与演化。认识到复齿鼯鼠在早、中更新世主要分布在我国西南地区,晚更新世时开始扩散到我国北方。该动物在中更新世时期时已存在有区域间的体型差异,并且在性别差异间也存在体型大小的明显区别。黄桷洞复齿鼯鼠化石还反映出,重庆及周缘地区在中更新世时期,存在有茂密的森林及丰富的野生果实等植被环境。

The Gele Mountain of Chongqing is located at the north edge of karst topography in south China. Karst caves with mammal fossils can be found all over the area. In this article, we have identified and analyzed the sample of Trogopterus Heude which obtained at Huangjue Cave in Gele Mountain, in order to explore the origin and evolution by comparing with the fossil records in other locations in China. Actually, Trogopterus Heude distributed mainly in Southwest China in Early and Middle Pleistocene, and then spread into North China in Late Pleistocene. In middle Pleistocene, there had been diversity of body size of Trogopterus Heude among areas, as well as the obvious contrast between different sexes. Meanwhile, Trogopterus Heude fossils of Huangjue Cave also indicated vegetation environment with flourish forest and rich wild fruits in Chongqing and neighboring areas in Middle Pleistocene.