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Changxingia longifolia gen. et sp nov., a new lycopsid from the Late Devonian of Zhejiang Province, South China
Wang, Deming ; Meng, Meicen ; Xue, Jinzhuang ; Basinger, James F. ; Guo, Yun ; Liu, Le
刊名review of palaeobotany and palynology
2014
关键词Changxingia Isoetales sensu lato Lagenicula Late Devonian monosporangiate-strobilus lycopsid Wutong Formation ARBORESCENT LYCOPSIDS EURAMERICA CONE LEPIDOCARPACEAE DIAPHORODENDRON MAZOCARPON SEGREGATE LYCOPODS BIOLOGY
DOI10.1016/j.revpalbo.2014.01.003
英文摘要Changxingia longifolia gen. et sp. nov. is described from the Upper Devonian Wutong Formation, Changxing County, northern Zhejiang Province, China. It possesses dichotomous axes, linear and smooth sterile leaves, rhomboidal leaf cushions with ligule pits and oval-oblanceolate leaf scars, and terminal sterile shoots or probable megasporangiate strobili. Leaves may have been persistent or not. Leaf cushions or bases bearing a ridge are helically arranged in parastichies on wide axes. Smooth megasporophylls with vertically expanded base borne in helices include a pedicel, a heel and an upturned linear lamina. The pedicel consists of a distinct keel and horizontal alations and the lamina has the distal part reflexed abaxially. A single ellipsoidal and sessile megasporangium occurs on the adaxial side of the pedicel and produces Lagenicula-type megaspores with delicate spines. Changxingia may be assigned to the Dichostrobiles of the Isoetales sensu lato and is compared with related taxa of the Late Palaeozoic. Fertile units (megasporophyll-sporangium complexes) are interpreted to have functioned as spore dispersal units. Heterosporous lycopsids with monosporangiate strobili are scarce in the Devonian, and Changxingia thus contributes to understanding of their early evolutionary history and megaspore dispersal mechanisms. (C) 2014 Elsevier B.V. All rights reserved.; Plant Sciences; Paleontology; SCI(E); 3; ARTICLE; dmwang@pku.edu.cn; 35-47; 203
语种英语
内容类型期刊论文
源URL[http://ir.pku.edu.cn/handle/20.500.11897/155521]  
专题地球与空间科学学院
推荐引用方式
GB/T 7714
Wang, Deming,Meng, Meicen,Xue, Jinzhuang,et al. Changxingia longifolia gen. et sp nov., a new lycopsid from the Late Devonian of Zhejiang Province, South China[J]. review of palaeobotany and palynology,2014.
APA Wang, Deming,Meng, Meicen,Xue, Jinzhuang,Basinger, James F.,Guo, Yun,&Liu, Le.(2014).Changxingia longifolia gen. et sp nov., a new lycopsid from the Late Devonian of Zhejiang Province, South China.review of palaeobotany and palynology.
MLA Wang, Deming,et al."Changxingia longifolia gen. et sp nov., a new lycopsid from the Late Devonian of Zhejiang Province, South China".review of palaeobotany and palynology (2014).
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