KMS Nanjing Institute of Geology and Palaeonotology,CAS
Eocladoxylon (Protopteridium) minutum (Halle) Koidzumi from the Middle Devonian of Yunnan, China: An early Rhacophyton-like plant? | |
Berry, CM; Yi, W (王怿) | |
2006-05-01 | |
发表期刊 | INTERNATIONAL JOURNAL OF PLANT SCIENCES |
ISSN | 1058-5893 |
卷号 | 167期号:3页码:551-566 |
摘要 | New specimens of Eocladoxylon (Protopteridium) minutum (Halle) Koidzumi collected from the Middle Devonian Xichong Formation, Yunnan province, China, demonstrate three orders of branching. Sterile branching systems have a pinnate two-dimensional branching pattern with alternate insertion of lower orders. Up to several times deeply dissected, overall wedge-shaped, flattened appendages are inserted alternately on the third order of branching. Second and third orders of branching have an opposite pair of similar appendages inserted at the base, perpendicular to the plane of the remaining branching system. Fertile appendages, consisting of a dichotomous axial system and terminal pairs of sporangia attached closely in groups of eight, replace the sterile appendages in fertile branches. Anatomy of a probable second-order axis demonstrates a bipolar clepsydroid vascular system. The sterile branching system and anatomy bear some similarity to the Late Devonian fernlike plant Rhacophyton. Eocladoxylon is neither a cladoxylopsid nor a progymnosperm, as was previously believed. The potential for an ancestor/descendant relationship between Iridopteridales and Rhacophyton via Eocladoxylon is briefly discussed in the context of the geographical isolation of the Middle Devonian flora of South China. |
关键词 | Devonian Plant Fossils Iridopteridales Rhacophyton Xichong Formation |
语种 | 英语 |
关键词[WOS] | New-york ; Sp-nov ; Anatomy ; Gen ; Pseudosporochnus ; Morphology ; Venezuela |
WOS研究方向 | Plant Sciences |
WOS类目 | Plant Sciences |
WOS记录号 | WOS:000238338300016 |
出版者 | UNIV CHICAGO PRESS |
文献类型 | 期刊论文 |
条目标识符 | http://ir.nigpas.ac.cn/handle/332004/563 |
专题 | 中国科学院南京地质古生物研究所 其他 |
通讯作者 | Berry, CM |
作者单位 | 1.Univ Cardiff Wales, Sch Earth Ocean & Planetary Sci, Cardiff CF10 3YE, Wales 2.Chinese Acad Sci, State Key Lab Paleobiol & Stratig, Nanjing Inst Geol & Paleontol, Nanjing 210008, Peoples R China |
推荐引用方式 GB/T 7714 | Berry, CM,Yi, W . Eocladoxylon (Protopteridium) minutum (Halle) Koidzumi from the Middle Devonian of Yunnan, China: An early Rhacophyton-like plant?[J]. INTERNATIONAL JOURNAL OF PLANT SCIENCES,2006,167(3):551-566. |
APA | Berry, CM,&Yi, W .(2006).Eocladoxylon (Protopteridium) minutum (Halle) Koidzumi from the Middle Devonian of Yunnan, China: An early Rhacophyton-like plant?.INTERNATIONAL JOURNAL OF PLANT SCIENCES,167(3),551-566. |
MLA | Berry, CM,et al."Eocladoxylon (Protopteridium) minutum (Halle) Koidzumi from the Middle Devonian of Yunnan, China: An early Rhacophyton-like plant?".INTERNATIONAL JOURNAL OF PLANT SCIENCES 167.3(2006):551-566. |
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