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| Xinjiangoxylon Gen. Nov., a New Gymnosperm from the Latest Permian of China | |
| 作者姓名： | SHI Xiao YU Jianxin LI Hui CHI Hongfei and ZHANG Wu |
| 作者单位： | 1 State Key Laboratary of Biogeology and Environmental Geology, Wuhan 430074, China 2 Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China 3 Centre de Recherche sur la Paléobiodiversité et les Paléoenvironnements, Université Pierre et Marie Curie, Paris 75252, France 4 Shenyang Institute of Geology and Mineral Resources, Ministry of National Land and Resources, Shenyang 110034, China |
| 基金项目： | The study was supported by National Natural Science Foundation of China (Grant No. 40972002, 41272024), China Geological Survey (Grant No. 1212011120142) and 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. |
| 关 键 词： | 裸子植物 二叠纪末 中国西北 新疆维吾尔自治区 次生木质部 木化石 上二叠统 早三叠世 |
| 收稿时间： | 2013/10/26 0:00:00 |
| 修稿时间： | 2014/2/18 0:00:00 |
Xinjiangoxylon Gen.Nov., a New Gymnosperm from the Latest Permian of China |
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| Authors: | SHI Xiao YU Jianxin LI Hui CHI Hongfei ZHANG Wu |
| Institution: | 1. State Key Laboratary of Biogeology and Environmental Geology, Wuhan 430074, China ;Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China ;Centre de Recherche sur la Paléobiodiversité et les Paléoenvironnements, Université Pierre et Marie Curie, Paris 75252, France 2. State Key Laboratary of Biogeology and Environmental Geology, Wuhan 430074, China ;Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China 3. Shenyang Institute of Geology and Mineral Resources, Ministry of National Land and Resources, Shenyang 110034, China |
| Abstract: | 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. |
| Keywords: | Paleobotany taxonomy Gymnospermae mass extinction Late Permian Xinjiang AR |
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