典型文献
New Discovery of Oligocene Gastropod Opercula from the Yehucheng Formation in Northwestern China
文献摘要：
Fourteen species of nonmarine gastropod opercula are found to be in high abundance in the Oligocene upper member of the Yehucheng Formation,Lanzhou Basin,northwest China.They are attributed to two families,namely Bithyniidae and Assimineidae,and four genera,namely Pseudemmericia,Bithynia,Mirolaminatus and Assiminea.Among them,three species are new,and they are Bithynia paramonolithic sp.nov.,B.obliquus sp.nov.,and B.disregularis sp.nov.Some of these species were first discovered in Paleogene strata of the vast Northwest China and can be compared with the opercula recovered from the Paleogene deposits in East and South China.It is inferred from the paleontology and sediment associations that the climate was slightly humid and the fauna probably inhabited the fresh or brackish water of a shallow lake in the Lanzhou Basin during the late early Oligocene period.
文献关键词：
中图分类号：
作者姓名：
LI Zhaoyu;LI Yongxiang;ZHANG Yunxiang;XIE Kun;LI Zhichao
作者机构：
State Key Laboratory of Continental Dynamics,Department of Geology,National Demonstration Center for Experimental Geology Education,Institute of Cenozoic Geology and Environment,Northwest University,Xi'an 710069,China;School of Land Engineering,Chang,an University,Xi,an 710054,China
文献出处：
引用格式：
[1]LI Zhaoyu;LI Yongxiang;ZHANG Yunxiang;XIE Kun;LI Zhichao-.New Discovery of Oligocene Gastropod Opercula from the Yehucheng Formation in Northwestern China)[J].地质学报（英文版）,2022(01):61-70
A类：
Gastropod,Opercula,Yehucheng,nonmarine,gastropod,opercula,Bithyniidae,Assimineidae,Pseudemmericia,Bithynia,Mirolaminatus,Assiminea,paramonolithic,disregularis,paleontology
B类：
New,Discovery,Oligocene,from,Formation,Northwestern,China,Fourteen,species,found,high,abundance,upper,member,Lanzhou,Basin,northwest,They,attributed,two,families,namely,four,genera,Among,them,three,new,they,nov,obliquus,Some,these,were,first,discovered,Paleogene,strata,vast,can,compared,recovered,deposits,East,South,It,inferred,sediment,associations,that,climate,was,slightly,humid,fauna,probably,inhabited,fresh,brackish,water,shallow,lake,during,late,early,period
AB值：
0.469498
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机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
