Xinjiangoxylon Gen.Nov.,a New Gymnosperm from the Latest Permian of China  

作　　者：SHI Xiao YU Jianxin LI Hui CHI Hongfei ZHANG Wu 

机构地区：[1]State Key Laboratary of Biogeology and Environmental Geology [2]Faculty of Earth Sciences,China University of Geosciences [3]Centre de Recherche sur la Paleobiodiversite et les Paleoenvironnements,Universite Pierre et Marie Curie,Paris 75252,France [4]Shenyang Institute of Geology and Mineral Resources,Ministry of National Land and Resources

出　　处：《Acta Geologica Sinica(English Edition)》2014年第5期1356-1363,共8页地质学报（英文版）

基　　金：supported by National Natural Science Foundation of China(Grant No.40972002,41272024);China Geological Survey (Grant No.1212011120142);State Key Laboratory of Biogeology and Environmental Geology(Grant No. GBL11302)

摘　　要：Following the greatest known end-Permian mass extinction plants have low diversity. Lycopsids and conifers dominated on land. A new gymnosperm Xinjiangoxylon gen. nov. is proposed based on a woody stem specimen collected from the Upper Permian （latest, Changhsingian） Upper Guodikeng Formation of the Taoshuyuan section, Turpan, Xinjiang Uygur Autonomous Region, Northwest China. The decorticated stem is characterized by a complex pith, endarch primary xylem and a thick secondary xylem cylinder. Numerous petrified woods were found in the Changhsingian at this section. However, there are rare wood fossils in the Early Triassic. The abrupt decrease of fossil woods worldwide relates to the crisis at the end of the Permian. Xinjiangoxylon turpanense gen et. sp. nov. appears to represents one gymnosperm that existed in the latest Permian.Following the greatest known end-Permian mass extinction plants have low diversity. Lycopsids and conifers dominated on land. A new gymnosperm Xinjiangoxylon gen. nov. is proposed based on a woody stem specimen collected from the Upper Permian （latest, Changhsingian） Upper Guodikeng Formation of the Taoshuyuan section, Turpan, Xinjiang Uygur Autonomous Region, Northwest China. The decorticated stem is characterized by a complex pith, endarch primary xylem and a thick secondary xylem cylinder. Numerous petrified woods were found in the Changhsingian at this section. However, there are rare wood fossils in the Early Triassic. The abrupt decrease of fossil woods worldwide relates to the crisis at the end of the Permian. Xinjiangoxylon turpanense gen et. sp. nov. appears to represents one gymnosperm that existed in the latest Permian.

关 键 词：PALEOBOTANY TAXONOMY Gymnospermae mass extinction Late Permian Xinjiang AR 

分 类 号：Q914[天文地球—古生物学与地层学] P534.46[生物学—古生物学]