Studies on some permineralized lycopsid remains from the Upper Devonian of North Xinjiang, NW China
文献类型：期刊论文
| 作者 | Cai, CY; Chitaley, S; Dou, YW |
| 刊名 | PALAEONTOGRAPHICA ABTEILUNG B-PALAOPHYTOLOGIE
 |
| 出版日期 | 2002-10-01 |
| 卷号 | 262期号:5-6页码:119-+ |
| 关键词 | lycopsid cone permineralized Xinjiangostrobus Upper Devonian China |
| ISSN号 | 0375-0299 |
| 文献子类 | Article |
| 英文摘要 | In this paper four silicified lycopsid cones and three associated vegetative axes are described from the Upper Devonian deposits of North Xinjiang, northwestern China. The cones, probably obovoid in form, are partially preserved as permineralizations; they measure 32-55 mm in diameter and are estimated to be up to 4-6 cm long. The cone axis has small pith surrounded by exarch primary xylem with 30-35 protoxylem strands. The cortex is differentiated into an inner parenchymatous zone and an outer zone composed of dark thick-walled cells. The sporophyll traces extend through the cortex almost at right angle to the main strand. The sporophylls are arranged in loose helices. They are simple, triangular to semi-circular in transverse section, lacking prominent lateral or distal laminae or keels, and are composed of simple parenchymatous tissue. They retain persistent sporangial wall remnants and some centrally located sterile tissue on their adaxial surfaces, resulting in the appearance of adaxial plate-like structures. The cones are senescent and lack sporangial contents, but a few probable miospores and tetrahedral miospore tetrads are found adhering to some of the sporophylls. Individual spores are about 20-25 mum tetrads around 60-80 mum in diameter. Monads show a trilete haptotypic mark and low, rugose ornamentation. The spores have been tentatively identified as Densosporites, Acinosporites, Foveolatisporites or Verrucosisporites. Associated sterile axes, thought to represent the same plant on the basis of anatomical and morphological similarity have either a two- or three-zoned cortex and lack secondary tissues. Comparison with known Devonian lycopsid cones warrants the creation of a new taxon: Xinjiangostrobus gen. nov. |
| WOS关键词 | SP-NOV ; GEN |
| WOS研究方向 | Paleontology |
| 语种 | 英语 |
| WOS记录号 | WOS:000180399700002 |
| 出版者 | E SCHWEIZERBARTSCHE VERLAGS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/77813]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Cai, CY |
| 作者单位 | 1.Acad Sinica, Inst Geol & Palaeontol, Nanjing 210008, Peoples R China 2.Cleveland Museum Nat Hist, Cleveland, OH 44106 USA 3.Natl Bur Oceanog, Inst Oceanog 3, Xiamen 361005, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cai, CY,Chitaley, S,Dou, YW. Studies on some permineralized lycopsid remains from the Upper Devonian of North Xinjiang, NW China[J]. PALAEONTOGRAPHICA ABTEILUNG B-PALAOPHYTOLOGIE,2002,262(5-6):119-+. |
| APA | Cai, CY,Chitaley, S,&Dou, YW.(2002).Studies on some permineralized lycopsid remains from the Upper Devonian of North Xinjiang, NW China.PALAEONTOGRAPHICA ABTEILUNG B-PALAOPHYTOLOGIE,262(5-6),119-+. |
| MLA | Cai, CY,et al."Studies on some permineralized lycopsid remains from the Upper Devonian of North Xinjiang, NW China".PALAEONTOGRAPHICA ABTEILUNG B-PALAOPHYTOLOGIE 262.5-6(2002):119-+. |
入库方式： OAI收割
来源：地质与地球物理研究所
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