| 内蒙古乌达地区早二叠世晋囊蕨属一新种 |
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| 引用本文： | 邓胜微 孙克勤. 内蒙古乌达地区早二叠世晋囊蕨属一新种[J]. Acta Botanica Sinica, 2000, 42(5): 533-538 |
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| 作者姓名： | 邓胜微 孙克勤 |
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| 作者单位： | [1]石油勘探开发科学研究院 [2]中国科学院植物研究所 |
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| 基金项目： | TheNationalNaturalScienceFoundationofChina!(4 9872008，4982 5101) |
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| 摘 要： | 通过扫描电镜研究，建立了内蒙古中部乌达地区下二叠统山西组晋囊蕨诉一个新种Ｃｈａｎｓｉｔｈｅｃａ ｗｕｄａｅｎｓｉｓ ｓｐ ．ｏｎｖ．。新种的小心片Ｓｐｈｅｎｏｐｔｅｒｉｓ型，囊群椭圆形，由４～１０个孢子囊组成，着生一示羽片背面，位于中脉的两侧。环带横列于孢子囊的上部，完全，单排细胞，细胞数目约为１８个，这些特征表明新种属于里白科。
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| 关 键 词： | 里白科 晋囊蕨属 早二叠世 新种 |
A New Gleicheniaceous Fern Chansitheca (Sphenopteris) wudaensis from the Lower Permian of Wuda, Nei Mongol, China |
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| DENG Sheng_Hui ,SUN Ke_Qin ,LI Cheng_Sen. A New Gleicheniaceous Fern Chansitheca (Sphenopteris) wudaensis from the Lower Permian of Wuda, Nei Mongol, China[J]. , 2000, 42(5): 533-538 |
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| Authors: | DENG Sheng_Hui SUN Ke_Qin LI Cheng_Sen |
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| Affiliation: | DENG Sheng_Hui 1,SUN Ke_Qin 2,LI Cheng_Sen 3 |
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| Abstract: | Chansitheca (Sphenopteris) wudaensis sp. nov. is described based on the materials collected from the Lower Permian Shansi Formation of Wuda, Nei Mongol, China. The frond is small and at least two times pinnate. The pinnule is sphenopteroid. The sori are borne on the abaxial surface of the pinnule, arranged in two rows parallel to the midvein, elliptic,and composed of 4-10 round sporangia. The indusium is absent. The annulus is transverse and complete, and consists of about 18 thickened cells. The features of the fertile parts, sori, sporangia and annulus and the absence of indusium indicate that the new species belongs to the Gleicheniaceae. |
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| Keywords: | Lower Permian Gleicheniaceae Chansitheca |
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