贵州盘县火铺镇茅口组剖面及其类动物群

贵州省盘县特区火铺镇茅口组的　类动物群共有　类26属83种(不含未定种),Neoschwagerina　带自下而上可分为Cancellinaprimigena亚带、Praesumatrinaschellwieni亚带、Afghanellaschencki亚带、Neoschwagerinadouvillei亚带和ChusenellaishanensisYabeinagigantea等5个亚带。研究结果表明,贵州地区茅口阶底部最早出现的Neoschwagerina类群以及与其共生的Cancellina分子在不同剖面不尽相同,茅口阶底界的精确对比尚有待于进一步明确代表该地茅口阶底界的　类标志种。

Study on the Maokou Formation( Middle Permian) and Its Fusulinacean Fossils of Panxian,Guizhou Province

The Middle Permian Maokou Formation is well exposed in the southwest of Panxian,Guizhou Province.Based on the materials collected from a section near the Huopu area,a detailed investigation has been conducted to study the lithology and bios tratigraphy ofthe Maokou Formation. With a thickness ofabout6 1 2 m,the Maokou For mation in thisarea iscomposed primarily ofcarbonaterocks rich in invertebrate fossils.A totalof83fusulinecean species belonging to2 6 genera is identified.The fusulinacen as semblage ofthe Maokou Formation in the Huopu area,referred to as the Neoschwagerina Zone in southwest Chinacould befurtherdivided in adescending orderinto thefollowing5 fusulinacen subzones:Chusenella ishanensis Yabeina gigantea Subzone,Neoschwagerina douvillei Subzone,Afghanella schencki Subzone,Praesumatrina schellwieni Subzone and Cancellina primigena Subzone.Theresultsofthisstudy demonstrate thatthefusulinacean fauna from the Maokou Formation in Panxian is similar to those in other regions of Guizhou.The above subzonesin the Huopu section can be wellcorrelated with the fusuli nacean zones in Southwest China proposed by the previous authors.