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描述了安徽繁昌和江苏泗洪新发现的晚新生代堆积物中的刺山鼠科化石。化石共有两属3种,即产自安徽、江苏的中华新来鼠(新种)(Neocometes sinensis sp.nov.)和产自安徽的大新来鼠(新种)(N.magna sp.nov.)及猪尾鼠未定种(Typhlomys sp.)。安徽繁昌的材料来自裂隙堆积,采样时未作分层处理,对单个化石属种很难进行准确的时代确定;但根据所采集化石的组分和上下层位保存的颜色与埋葬方式上的差异,推测Neocometes的时代为中新世,而Typhlomys可能较晚。Neocometes属的出现和典型中新世动物成员的存在,表明繁昌这一含古猿的裂隙堆积中含有大致与江苏泗洪动物群和山东山旺动物群相当、甚至可与泰国中新世动物群对比的啮齿动物组合。新种牙齿的形态特征显示,Neocometes属在亚洲经历了个体迅速增大,齿冠增高,齿脊增强,上臼齿外脊和下臼齿内脊逐渐发育的过程,与该属在欧洲的演化趋势有所不同。
Described in the late Cenozoic sediments in Fanchang, Anhui Province and Sihong, Jiangsu Province, the cetacean fossils. There are two genera and three fossils, namely Neocometes sinensis sp. Nov. From Anhui and Jiangsu and N.magna sp. Nov from Anhui ) And Typhlomys sp. The materials of Fanchang in Anhui Province come from the crevice accumulation. When sampling, they are not stratified. It is very difficult to accurately determine the age of individual fossil species. However, according to the composition of the fossil collected and the preservation of the upper and lower beds, , Speculate that the Neocometes era was Miocene, and that Typhlomys may be late. The presence of the Neocometes genera and the presence of typical Miocene animal members indicate that Fanchang, an ancient ape-like fissure deposit, contains roughly the same size as the Sihong fauna in Jiangsu and the Shanwang fauna in Shandong and may even be associated with the Thai Miocene fauna Contrasting rodent combinations. Morphological characteristics of the new species of teeth show that Neocometes in Asia experienced a rapid increase in the individual, the crown increased, tooth ridge enhancement, the upper molar and lower molar inner spine gradually development process, and the genus in Europe evolution trend Different.