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共测制了 13条新疆塔里木塔克拉玛干沙漠中部和北部井下的奥陶系剖面 ,并在不同的相区发现了不同的牙形刺序列。在北部地区牙形刺带由上而下为 :Aphelognathus pyramidalis,Yaoxianognathus yaoxianensis- Belodi-na confluens,Baltoniodus alobatus,Pygodus anserinus,P. serra,Paroistodus proteus,Glyptoconus quadraplicatus和 Rossodus manitouensis- Cordylodus rotundatus等带 ;在中部地区 ,牙形刺带由上而下为 :Serratognathus diver-sus,Chosonodina和 Rossodusm anitouensis- Cordylodus rotundatus等带。另外 ,本文也讨论了牙形刺带的对比 ,生物相及本区的古地理轮廓变化 ;描述了新种 Pygodus xinjiangensis。
A total of 13 Ordovician sections were surveyed down the central and northern downcomers of the Taklimakan Desert in Tarim, Xinjiang. Different conodonts were found in different facies. In the northern region, the conodonts are top-down: Aphelognathus pyramidalis, Yaoxianognathus yaoxianensis-Belodi-na confluens, Baltoniodus alobatus, Pygodus anserinus, P. serra, Paroistodus proteus, Glyptoconus quadraplicatus and Rossodus manitouensis-Cordylodus rotundatus; In the area, the conodonts are top-down: Serratognathus diver-sus, Chosonodina and Rossodusm anitouensis-Cordylodus rotundatus. In addition, the paper also discusses the comparison of conodont zones, the biotransformation and palaeogeographic contour changes in this area; and the new species Pygodus xinjiangensis is described.