| Discovery of organic connection of Chiropteris Kurr and Nystroemia Halle from Early Permian of western Henan, China |
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| 作者姓名： | WANGJun H.W.Pfefferkorn SUNBainian LIULujun |
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| 作者单位： | [1]NanjingInstituteofGeologyandPalaeontology,ChineseAcademyofSciences,Naniing210008,China [2]DepartmentofEarthandEnvironmentalScience,UniversityofPenn-sylvania,Philadelphia,PA19104-6316,USA [3]DepartmentofGeology,LanzhouUniversity,Lanzhou730000,China |
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| 基金项目： | 国家自然科学基金，中国科学院资助项目 |
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| 摘 要： | Nystroemia reniformis (Kawasaki) comb. nov. is proposed based on specimens showing organic connections between Chiropteris reniformis Kawasaki and Nystroemia pectiniformis Halle from the Lower Permian of Dengfeng in Henan. Vegetative leaf has a long petiole, reniformed, cordate at the base, entire or slightly undulate at the margin;veins are fine, bifurcating repeatedly and finally becoming reticulate and forming polygonal or rhomboidal meshes.Fertile shoot arises from bract axils. The form of the bract is identical to that of a vegetative leaf. Ovuliferous organ arises from the axU of leafy organ, or in other ease, both ovulfferous and leafy organs irregularly arise from the axis of the fertile shoot respectively. Numerous bicornute platyspermic seeds are arranged in two rows, obconical, with micropyle pointing upwards. It may represent a new extinct gymnosperms.
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| 关 键 词： | 中国 河南西部 早二叠纪 掌蕨属 髻籽羊齿属 古植物学 |
Discovery of organic connection of<Emphasis Type="Italic">Chiropteris</Emphasis> Kurr and<Emphasis Type="Italic">Nystroemia</Emphasis> Halle from Early Permian of western Henan,China |
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| WANGJun H.W.Pfefferkorn SUNBainian LIULujun.Discovery of organic connection of Chiropteris Kurr and Nystroemia Halle from Early Permian of western Henan, China[J].Chinese Science Bulletin,2003,48(20):2248-2252. |
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| Authors: | Jun Wang H W Pfefferkorn Bainian Sun Lujun Liu |
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| Affiliation: | WANG Jun1, H. W. Pfefferkorn2, SUN Bainian3 & LIU Lujun1 1. Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China; 2. Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, PA 19104-6316, USA; 3. Department of Geology, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | Nystroemia reniformis (Kawasaki) comb. nov. is proposed based on specimens showing organic connections between Chiropteris reniformis Kawasaki and Nystroemia pectiniformis Halle from the Lower Permian of Dengfeng in Henan. Vegetative leaf has a long petiole, reniformed, cordate at the base, entire or slightly undulate at the margin; veins are fine, bifurcating repeatedly and finally becoming reticulate and forming polygonal or rhomboidal meshes. Fertile shoot arises from bract axils. The form of the bract is identical to that of a vegetative leaf. Ovuliferous organ arises from the axil of leafy organ, or in other case, both ovuliferous and leafy organs irregularly arise from the axis of the fertile shoot respectively. Numerous bicornute platyspermic seeds are arranged in two rows, obconical, with micropyle pointing upwards. It may represent a new extinct gymnosperms. |
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| Keywords: | Nystroemia reniformis (Kawasaki) comb nov gymnosperms Permian Henan China |
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