Silurian ostracods from the Nyalam region,southern Tibet,China and their implications on palaeoenvironment and palaeobiogeography  

作　　者：Jun-Jun Song Wen Guo Jia-Yuan Huang Yi-Chun Zhang Zhong-Yang Chen Yu-Cong Sun Juan Ma Wen-Kun Qie 

机构地区：[1]State Key Laboratory of Paleobiology and Stratigraphy,Nanjing Institute of Geology and Paleontology and Center for Excellence in Life and Paleoenvironment,Chinese Academy of Sciences,Nanjing 210008,Jiangsu Province,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]State Key Laboratory of Biogeology and Environmental Geology,School of Earth Sciences,China University of Geosciences(Wuhan),Wuhan 430074,Hubei Province,China

出　　处：《Journal of Palaeogeography》2022年第1期85-96,共12页古地理学报（英文版）

基　　金：financially supported by the Second Tibetan Plateau Scientific Expedition and Research Program(Grant No.2019QZKK0706);the National Natural Science Foundation of China(Grant Nos.41802002 and 91855205);the Strategic Priority Research Program(B)of Chinese Academy of Sciences(Grant No.XDB26000000)。

摘　　要：The overall occurrence,stratigraphical distribution,palaeoenvironmental and palaeobiogeographical significances of the ostracod faunas from the Silurian Pulu Formation in the Yalai West Ⅱ section,Nyalam region,southern Tibet,China,are documented for the first time.Thirty-two species belonging to 19 genera are identified and figured herein.The ostracod fauna in the Pulu Formation indicates an age of the late Llandovery-Pridoli.The ostracods belong to a podocope-rich association,which suggests an offshore environment for the Yalai West II section.The ostracods of the Pulu Formation have strong affinities with the South China taxa and also share some similarities with those from Baltica.This implies that ostracods could probably benefit from sea-level changes to facilitate faunal exchanges between peri-Gondwana and Baltica.Geographical isolation and global sea-level changes are proposed as the primary factors controlling the palaeobiogeographical distribution of ostracods during the Silurian.

关 键 词：OSTRACODS SILURIAN Pulu Formation Tethyan Himalaya terrane South Tibet PALEOBIOGEOGRAPHY 

分 类 号：Q911[天文地球—古生物学与地层学]