Species of the medullosan ovule Stephanospermum from the Lopingian (late Permian) floras of China
文献类型：期刊论文
| 作者 | Spencer, Alan R. T.; Wang, Shi-Jun; Dunn, Michael T.; Hilton, Jason1 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2013 |
| 卷号 | 76页码:59-69 |
| 关键词 | Gymnosperm Medullosales Trigonocarp Coal-ball Wangjiazhai Formation Shuicheng |
| ISSN号 | 1367-9120 |
| DOI | 10.1016/j.jseaes.2013.07.030 |
| 文献子类 | Article |
| 英文摘要 | The medullosan pteridosperm ovule Stephanospermum Brongniart is a well-known component of Carboniferous aged coal-ball and siderite nodule floras from North America and Europe but also occurs in the Permian floras of Cathaysia where it is represented by the Lopingian (late Permian) aged species Stephanospermum trunctatum (Li) Wang et al. (2009) from coal-balls in the Wangjiazhai Formation in Southern China. We provide a detailed emendation of S. trunctatum and illustrate it comprehensively for the first time, and document an additional specimen from the Wangjiazhai Formation coal-ball assemblage that we assign to Stephanospermum shuichengensis sp. nov. S. shuichengensis is distinguished from S. trunctarum by the absence of apical teeth in the sclerotesta and non-obovate base. The two species of Stephanospermum from the Wangjiazhai Formation are important as they extend the stratigraphic and geographical range of the genus from the Pennsylvanian of Euramerica into the Lopingian of Southern China, and demonstrate that the genus persisted in wetland, peat forming environments in the run up to the end-Permian mass extinction event. The 44 MY stratigraphic discontinuity between the Euramerican and the Cathaysian species, here named the Stephanospermum gap, leads us to infer that the genus was likely to have occurred in the Pennsylvanian-Permian successions of southern Russia and northern China that are geographically and stratigraphically intermediate to the known occurrences but from which the genus has yet to be discovered. Medullosan pteridosperms appear to have become extinct at or immediately prior to the Permian-Triassic boundary that coincides with the Permo-Trias mass extinction event; although the exact causes of this loss in plant diversity remains unknown, a response to regional climatic drying is likely to have been a contributing factor. (C) 2013 Elsevier Ltd. All rights reserved. |
| 学科主题 | Geosciences, Multidisciplinary |
| 出版地 | OXFORD |
| 电子版国际标准刊号 | 1878-5786 |
| WOS关键词 | SOUTHERN CHINA ; PTERIDOSPERMS ; PLANTS ; GENUS ; NOV |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| WOS记录号 | WOS:000326255500006 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | ARTS at Imperial College London ; CAS(Chinese Academy of Sciences) ; National Natural Science Foundation of China(National Natural Science Foundation of China (NSFC)) |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/27960]  |
| 专题 | 植物研究所_系统与进化植物学研究中心_系统与进化植物学研究中心_学位论文 |
| 作者单位 | 1.Dunn, Michael T.] Cameron Univ, Dept Biol Sci, Lawton, OK 73505 USA 2.[Spencer, Alan R. T.] Univ London Imperial Coll Sci Technol & Med, Dept Earth Sci & Engn, London SW7 2BP, England 3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China 4.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China 5.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, W Midlands, England |
| 推荐引用方式 GB/T 7714 | Spencer, Alan R. T.,Wang, Shi-Jun,Dunn, Michael T.,et al. Species of the medullosan ovule Stephanospermum from the Lopingian (late Permian) floras of China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2013,76:59-69. |
| APA | Spencer, Alan R. T.,Wang, Shi-Jun,Dunn, Michael T.,&Hilton, Jason.(2013).Species of the medullosan ovule Stephanospermum from the Lopingian (late Permian) floras of China.JOURNAL OF ASIAN EARTH SCIENCES,76,59-69. |
| MLA | Spencer, Alan R. T.,et al."Species of the medullosan ovule Stephanospermum from the Lopingian (late Permian) floras of China".JOURNAL OF ASIAN EARTH SCIENCES 76(2013):59-69. |
入库方式： OAI收割
来源：植物研究所
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