内蒙古锡林浩特盆地早侏罗世植物群
发布时间：2018-10-21 14:14
【摘要】：本文研究了产于内蒙古锡林浩特盆地早侏罗世红旗组的植物化石。室内鉴定和描述化石共计21属37种,分别属于木贼目、真蕨纲、苏铁纲、银杏纲、松柏纲和少量分散保存的种子。以真蕨纲占优势,苏铁纲、银杏纲和松柏纲居次,木贼目较少,未见到种子蕨。本文对其中保存角质层的部分裸子植物做了微细构造研究,包括苏铁纲的Nilssonia和Nilssoniopteris,银杏纲的Czekanowskia setacea Heer,Czekanowskia latifolia Turutanova-Ketova,Phoenicopsis angustifolia Heer和Ginkgoites ferganensis Brick。本文将锡林浩特植物群与我国吉林万宝盆地红旗组、北京西山下窑坡组、山西大同永定庄组、陕北富县组、新疆三工河组以及英国约克郡、中亚伊朗部分植物群等进行了对比,认为锡林浩特盆地红旗组的植物群时代为早侏罗世晚期。通过角质层微细构造研究分析了中生代全缘叶Nilssonia和Nilssoniopteris两者表皮细胞的差别:Nilssonia属气孔器单唇型,表皮细胞壁平直;Nilssoniopteris属气孔器复唇型,表皮细胞壁成波状弯曲。其中Nilssonia通过与已知的12个老种对比,确定了一个新种Nilssonia xinlinhotensis sp.nov.。最后,讨论了Nilssonia和Nilssoniopteris的时空分布规律,Nilssonia属在我国无论北方地区还是南方地区都是从西向东的演化趋势;Nilssoniopteris属从包括中国南方在内的欧洲-中国区向北迁移到中国北方及俄西伯利亚地区,最后在早白垩世时仅存在于中国东北及西伯利亚东部地区。两个属的兴衰阶段具有明显的差异,具有互为消长的特点。
[Abstract]:Plant fossils from the early Jurassic Red Flag formation in Xilinhaote Basin, Inner Mongolia, are studied in this paper. A total of 21 genera and 37 species of fossils were identified and described in the laboratory. They belong to the order Cyperidae, Pteridopteris, Cycas, Ginkgo, Pine and cypress, and a small amount of scattered preserved seeds. Cycads, Ginkgo and Pine cypress are the second most dominant class, but the order Cordenidae is less, and no seed fern is found. In this paper, the microstructures of some gymnosperms, including Nilssonia of Cycads and Czekanowskia setacea Heer,Czekanowskia latifolia Turutanova-Ketova,Phoenicopsis angustifolia Heer and Ginkgoites ferganensis Brick. of Ginkgo, are studied. In this paper, the Xilinhot flora is compared with the Red Flag formation in Wanbao Basin, Jilin Province, the Xishan Xia Yaopo formation in Beijing, the Datong Yongding Zhuang formation in Shanxi Province, the Fuxian formation in Northern Shaanxi, the Sangonghe formation in Xinjiang, and parts of the Iranian flora in Yorkshire and Central Asia. It is considered that the flora of Hongqi formation in Xilinhaote Basin is late early Jurassic. The difference of epidermal cells between Nilssonia and Nilssoniopteris of Mesozoic whole leaf was studied by means of microstructure of cuticle. Nilssonia belongs to single lip type of stomatal organ and the cell wall of epidermis is straight and Nilssoniopteris belongs to multiple lip type of stomatal organ with wavy curving of epidermal cell wall. Nilssonia has identified a new species of Nilssonia xinlinhotensis sp.nov.. by comparing it with 12 known old species. Last The temporal and spatial distribution of Nilssonia and Nilssoniopteris are discussed. The Nilssonia genus evolves from west to east in both northern and southern regions of China, and Nilssoniopteris genus migrates from Europe-China region including southern China to northern China and Russia-Siberia region. Finally, in the early Cretaceous only existed in northeast China and eastern Siberia. The rise and fall stages of the two genera have obvious differences and have the characteristics of mutual growth and decline.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P534.52;Q914
本文编号：2285350
[Abstract]:Plant fossils from the early Jurassic Red Flag formation in Xilinhaote Basin, Inner Mongolia, are studied in this paper. A total of 21 genera and 37 species of fossils were identified and described in the laboratory. They belong to the order Cyperidae, Pteridopteris, Cycas, Ginkgo, Pine and cypress, and a small amount of scattered preserved seeds. Cycads, Ginkgo and Pine cypress are the second most dominant class, but the order Cordenidae is less, and no seed fern is found. In this paper, the microstructures of some gymnosperms, including Nilssonia of Cycads and Czekanowskia setacea Heer,Czekanowskia latifolia Turutanova-Ketova,Phoenicopsis angustifolia Heer and Ginkgoites ferganensis Brick. of Ginkgo, are studied. In this paper, the Xilinhot flora is compared with the Red Flag formation in Wanbao Basin, Jilin Province, the Xishan Xia Yaopo formation in Beijing, the Datong Yongding Zhuang formation in Shanxi Province, the Fuxian formation in Northern Shaanxi, the Sangonghe formation in Xinjiang, and parts of the Iranian flora in Yorkshire and Central Asia. It is considered that the flora of Hongqi formation in Xilinhaote Basin is late early Jurassic. The difference of epidermal cells between Nilssonia and Nilssoniopteris of Mesozoic whole leaf was studied by means of microstructure of cuticle. Nilssonia belongs to single lip type of stomatal organ and the cell wall of epidermis is straight and Nilssoniopteris belongs to multiple lip type of stomatal organ with wavy curving of epidermal cell wall. Nilssonia has identified a new species of Nilssonia xinlinhotensis sp.nov.. by comparing it with 12 known old species. Last The temporal and spatial distribution of Nilssonia and Nilssoniopteris are discussed. The Nilssonia genus evolves from west to east in both northern and southern regions of China, and Nilssoniopteris genus migrates from Europe-China region including southern China to northern China and Russia-Siberia region. Finally, in the early Cretaceous only existed in northeast China and eastern Siberia. The rise and fall stages of the two genera have obvious differences and have the characteristics of mutual growth and decline.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P534.52;Q914
【参考文献】
相关期刊论文 前1条
1 商平,付国斌,侯全政,邓胜徽;新疆吐哈盆地中侏罗世植物化石[J];现代地质;1999年04期
，本文编号：2285350
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