Evolution and paleogeography of Eospirifer(Spiriferida,Brachiopoda) in Late Ordovician and Silurian

作     者：ZHAN RenBin JIN JiSuo LIANG Yan MENG LingKai 

作者机构：State Key Laboratory of Palaeobiology and StratigraphyNanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China Department of Earth SciencesUniversity of Western OntarioLondonON N6A 5B7Canada 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2012年第55卷第9期

页      面：1427-1444页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：supported by Chinese Academy of Sciences (Grant No. KZCX2-YW-Q05-01) National Natural Science Foundation of China(Grant No. 40825006) the CAS/SAFEA International Partnership Program for Creative Research Teams and the State Key Laboratory of Paleobiology and Stratigraphy 

主　　题：古地理环境 腕足动物门 奥陶系 志留系 物种多样性 演化 宏观进化 中国南方 

摘      要：Eospirifer,the oldest known genus of the spiriferide group(Brachiopoda),first appeared on the Zhe-Gan Platform of South China paleoplate during late Katian(Late Ordovician) represented by *** survived the end-Ordovician mass extinction,and reappeared on the Upper Yangtze Platform of South China paleoplate by the end of Ordovician near the upper part of the Normalograptus persculptus *** from the beginning of Silurian,Eospirifer experienced some morphological innovations and expanded its geographical distribution *** reached its species diversity acme and the widest geographic distribution in Wenlock(middle Silurian),with the diversity hotspots in Laurentia,Avalonia,and *** shell size frequency curves of *** under different paleogeographic settings suggest that this pioneer species of Eospirifer,with several macroevolutionary novelties,adopted a range of life strategies to adapt to the changing environments during early spiriferide *** are also some morphological macroevolutionary trends during the evolutionary history of Eospirifer from Late Ordovician to the end of Silurian,such as the ever enlarging shell sizes and the width/length ratios from late Katian to Wenlock,but decreasing apparently of both parameters from Wenlock to Pridoli.