古脊椎动物学报2023，Vol.61Issue(1)：43-70,28.DOI:10.19615/j.cnki.2096-9899.221123
内蒙古二连盆地沙拉木伦期啮齿类动物群研究
The Sharamurunian rodent fauna in the Erlian Basin,Nei Mongol,China
摘要
Abstract
New middle Eocene rodent fossils discovered from the lower part of the Shara Murun Formation of Ula Usu,Erlian Basin,Nei Mongol,China,the classical locality of Sharamurunian mammalian fauna,were identified as 9 separate species(the ctenodactyloids Yuomys cavioides,Gobiomys neimongolensis,G.exiguus,and G.asiaticus,the dipodids Allosminthus uniconjugatus and Primisminthus shanghenus,the cricetid Pappocricetodon rencunensis,the ischyromyid Hulgana cf.H.ertnia,and the cylindrodontid Proardynomys ulausuensis)belonging to 7 genera,4 families,and 1 superfamily of Rodentia.The Ula Usu rodent assemblage shares a high degree of similarity with that from the"Lower Red"beds of the Erden Obo,and they both represent the typical Sharamurunian rodent assemblages found in northern China.The Sharamurunian rodent fauna in the Erlian Basin is analyzed by the minimum number of individuals based on the rodent materials from the lower part of the Shara Murun Formation in the Ula Usu and the"Lower Red"beds of the Erden Obo.In the Sharamurunian rodent fauna of the Erlian Basin,ctenodactyloids are the most dominant elements,and dipodids and cricetids follow next in prevalence.By analyzing the evolution of the rodent species richness in the Erlian Basin,the rodent faunas show a transformation from a ctenodactyloid dominant assemblage to a cricetid-dipodid dominant one in chronological order.The Sharamurunian rodent fauna from the Erlian Basin differs from that of the Yuanqu Basin and the differences in the rodent assemblages may be a response to the differences between the regional environments.关键词
内蒙古/二连盆地/乌拉乌苏/沙拉木伦期/啮齿类动物群Key words
Ula Usu/Erlian Basin/Nei Mongol/Sharamurunian/rodent fauna分类
生物科学引用本文复制引用
李琪,李茜..内蒙古二连盆地沙拉木伦期啮齿类动物群研究[J].古脊椎动物学报,2023,61(1):43-70,28.基金项目
国家自然科学基金(批准号:42072023)、中国科学院战略性先导科技专项(编号:XDB26000000,XDA20070203)和中国科学院古生物化石发掘与修理专项资助.We thank Wang Yuanqing,Meng Jin,Bai Bin,Xu Rancheng,Wang Xiaoyang,Zhou Wei,Wang Yongxing,Wang Yongfu,Li Shijie,and Li Qi of the field team for their hard work and dedication.Hou Yemao and Yin Pengfei helped to perform the CT-scans.We also thank the editors and reviewers for their constructive comments on our manuscript.This work was supported by the National Natural Science Foundation of China(Grant no.42072023)and the Strategic Priority Research Program of Chinese Academy of Sciences(XDB26000000,XDA20070203).The fieldwork was funded by the Special Fund for Fossil Excavation and Preparation,CAS. （批准号:42072023）
