西藏羌塘中部地区Polydiexodina类动物群  

THE POLYDIEXODINA(FUSULINIDS) FAUNA FROM CENTRAL QIANGTANG, TIBET, CHINA

作　　者：程立人[1] 李才[1] 张以春[1] 吴水忠[2] 

机构地区：[1]吉林大学地球科学学院,吉林长春1300612 [2]东北大学秦皇岛分校,河北秦皇岛066001

出　　处：《微体古生物学报》2005年第2期152-162,共11页Acta Micropalaeontologica Sinica

基　　金：西藏1:25万玛依岗日幅(200313000015)区域地质调查项目;青藏高原地层格架建设与完善(200313000054)共同资助。

摘　　要：描述了采自西藏羌塘中部地区■类化石的一部分,计7属13种,分属4科,两超科。其中Polydiexodina5种,含2新种。■类动物群面貌与Neoschwagerina带相当,确定产Polydiexodina地层的形成时代属中二叠世茅口期。扩大了Polydiexodina的分布范围,为较大区域性地层的划分、对比提供了生物依据,也为研究古生物地理分区提供了新资料。This paper deals with the description of fusulinid fossils collected from the central area of Qiangtang, Tibet. Totally, 7 genera and 13 species, assigned to 4 families and 2 superfamilies, were discovered. Five species are of Polydiexodina including two new species. The fusulinid fauna here corresponds to Neosch- wagerina zone so that the time of Polydiexodina-bearing strata is Maokouan in age of Middle Permian. The discovery of Polydiexodina provides new data to the study of its biogeography distribution and for the classification and correlation of the strata on a larger scale.

关 键 词：西藏 羌塘中部地区 Polydiexodina TING类 动物群 二叠世 茅口期 新种 化石 形态特征 

分 类 号：Q915[天文地球—古生物学与地层学]