Anatomy of the Middle Devonian cladoxylopsid Panxia gabata Y. Wang et Berry from Yunnan Province, southwestern China

doi:10.1016/j.revpalbo.2015.05.005

	Anatomy of the Middle Devonian cladoxylopsid Panxia gabata Y. Wang et Berry from Yunnan Province, southwestern China
	Xue, Jinzhuang ; Huang, Pu ; Wang, Deming ; Wang, Qi 1; Hao, Shougang
	2016
发表期刊	REVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN	0034-6667
卷号	224 页码:66-82
摘要	New material collected from the Middle Devonian (Givetian) Haikou Formation of Yunnan Province, southwestern China, reveals details of anatomy of the cladoxylopsid Panxia gabata Y. Wang et Berry. The primary xylem in main axes consists of numerous primary xylem segments, most of which are radially directed and elongate. Some xylem segments are connected toward the center to form V, Y, W, or more complex-shaped configurations. One permanent protoxylem strand occurs near the outer tip of each xylem segment of the main axes. A dissected primary xylem column occurs in first-order branches, but the xylem segments are fewer in number and smaller in size than those in main axes. Most xylem segments in first-order branches are unidirectional and parallel in orientation, some are connected to form Y, twice-dichotomous, or more complex-shaped configurations, and one protoxylem strand occurs near each of the two ends of individual xylem segment or a segment group. Metaxylem tracheids are characterized by multiseriate circular bordered pits. Vascular traces depart from the tip of primary xylem segments, produced by elongation and division of protoxylem strands. These traces are of various sizes and shapes, from circular, elliptical to elongate-elliptical in transverse outline, with one or two protoxylem strands. Cortex tissues are mainly composed of thin-walled, approximately isodiametric cells. Within the Cladoxylopsida, Panxia, a plant endemic in South China, is more similar in stellar anatomy to the Laurussian Pseudosporochnales and Rotoxylon Cordi et Stein than to other plants. These shared anatomical traits seem unlikely to represent the convergent evolution of plants on different continents, but imply that Panxia, Rotoxylon, and Pseudosporochnales may have evolved from a recent common ancestor which had existed across Laurussia and South China in earlier times. (C) 2015 Elsevier B.V. All rights reserved.
关键词	Middle Devonian Fossil plant South China Euphyllophytes Cladoxylopsids Panxia
学科领域	Plant Sciences ; Paleontology
DOI	10.1016/j.revpalbo.2015.05.005
收录类别	SCI
语种	英语
WOS关键词	PSEUDOSPOROCHNUS-NODOSUS LECLERCQ ; NEW-YORK-STATE ; SOUTH CHINA ; SP-NOV. ; DENGLONGIA-HUBEIENSIS ; PLANT ; GEN. ; BELGIUM ; IRIDOPTERIDALES ; EUPHYLLOPHYTE
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000367858100007
出版者	ELSEVIER SCIENCE BV
Special Issue	SI
文献子类	Article
出版地	AMSTERDAM
EISSN	1879-0615
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41272018, 41172007]
作者邮箱	pkuxue@pku.edu.cn ; sghao@pku.edu.cn
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/25079
专题	系统与进化植物学国家重点实验室
作者单位	1.Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Xue, Jinzhuang,Huang, Pu,Wang, Deming,et al. Anatomy of the Middle Devonian cladoxylopsid Panxia gabata Y. Wang et Berry from Yunnan Province, southwestern China[J]. REVIEW OF PALAEOBOTANY AND PALYNOLOGY,2016,224:66-82.
APA	Xue, Jinzhuang,Huang, Pu,Wang, Deming,Wang, Qi,&Hao, Shougang.(2016).Anatomy of the Middle Devonian cladoxylopsid Panxia gabata Y. Wang et Berry from Yunnan Province, southwestern China.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,224,66-82.
MLA	Xue, Jinzhuang,et al."Anatomy of the Middle Devonian cladoxylopsid Panxia gabata Y. Wang et Berry from Yunnan Province, southwestern China".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 224(2016):66-82.

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