Uneven Distribution of Pseudotormentus De Wever et Caridroit(Radiolaria,Protozoa):Provincialism of a Permian Planktonic Microorganism  

作　　者：ITO Tsuyoshi FENG Qinglai MATSUOKA Atsushi 

机构地区：[1]State Key Laboratory of Geo-processes and Mineral Resources,China University of Geosciences [2]Graduate School of Science and Technology,Niigata University [3]Research Institute of Geology and Geoinformation,Geological Survey of Japan [4]Department of Geology,Faculty of Science,Niigata University

出　　处：《Acta Geologica Sinica(English Edition)》2016年第5期1598-1610,共13页地质学报（英文版）

基　　金：supported financially by NSFC (40839903);Ministry of Education of China (20110145130001);111 Project(Grant No.B08030) of China University of Geosciences,Wuhan,and Niigata University's scholarship program for graduate school students conducting research abroad

摘　　要：The Permian planktonic distribution is not well known,in contrast to other fossil distributions of nekton and benthos.Radiolaria are representative microfossils of plankton in the Permian palaeocean.This study compares both correlated radiolarian occurrences（Pseudotormentus De Wever et Caridroit and Quadriremis Nazarov et Ormiston） in literature data from the Pacific Rim and quantitative data from the Liuhuang and Gujingling sections in South China.Pseudotormentus distributions are concentrated in the Panthalassa,whereas Quadriremis occurrences are distributed over both the Panthalassa and the Palaeotethys.The uneven distribution of Pseudotormentus seems to have been controlled by a difference in the oceanic basins,indicating the presence of faunal differences in Permian planktonic microorganisms between the Panthalassa and the Palaeotethys.In other words,this study infers the provincialism of Permian planktonic microorganisms.The uneven distribution is explainable by a hypothesis that Pseudotormentus was strongly affected by a Panthalassan equatorial current.The Permian planktonic distribution is not well known,in contrast to other fossil distributions of nekton and benthos.Radiolaria are representative microfossils of plankton in the Permian palaeocean.This study compares both correlated radiolarian occurrences（Pseudotormentus De Wever et Caridroit and Quadriremis Nazarov et Ormiston） in literature data from the Pacific Rim and quantitative data from the Liuhuang and Gujingling sections in South China.Pseudotormentus distributions are concentrated in the Panthalassa,whereas Quadriremis occurrences are distributed over both the Panthalassa and the Palaeotethys.The uneven distribution of Pseudotormentus seems to have been controlled by a difference in the oceanic basins,indicating the presence of faunal differences in Permian planktonic microorganisms between the Panthalassa and the Palaeotethys.In other words,this study infers the provincialism of Permian planktonic microorganisms.The uneven distribution is explainable by a hypothesis that Pseudotormentus was strongly affected by a Panthalassan equatorial current.

关 键 词：PALAEOBIOGEOGRAPHY Palaeotethys PANTHALASSA Permian radiolaria Pseudotormentus Quadriremis 

分 类 号：Q911[天文地球—古生物学与地层学]