【摘要】：本文研究了產(chǎn)于內(nèi)蒙古錫林浩特盆地早侏羅世紅旗組的植物化石。室內(nèi)鑒定和描述化石共計(jì)21屬37種,分別屬于木賊目、真蕨綱、蘇鐵綱、銀杏綱、松柏綱和少量分散保存的種子。以真蕨綱占優(yōu)勢(shì),蘇鐵綱、銀杏綱和松柏綱居次,木賊目較少,未見到種子蕨。本文對(duì)其中保存角質(zhì)層的部分裸子植物做了微細(xì)構(gòu)造研究,包括蘇鐵綱的Nilssonia和Nilssoniopteris,銀杏綱的Czekanowskia setacea Heer,Czekanowskia latifolia Turutanova-Ketova,Phoenicopsis angustifolia Heer和Ginkgoites ferganensis Brick。本文將錫林浩特植物群與我國吉林萬寶盆地紅旗組、北京西山下窯坡組、山西大同永定莊組、陜北富縣組、新疆三工河組以及英國約克郡、中亞伊朗部分植物群等進(jìn)行了對(duì)比,認(rèn)為錫林浩特盆地紅旗組的植物群時(shí)代為早侏羅世晚期。通過角質(zhì)層微細(xì)構(gòu)造研究分析了中生代全緣葉Nilssonia和Nilssoniopteris兩者表皮細(xì)胞的差別:Nilssonia屬氣孔器單唇型,表皮細(xì)胞壁平直;Nilssoniopteris屬氣孔器復(fù)唇型,表皮細(xì)胞壁成波狀彎曲。其中Nilssonia通過與已知的12個(gè)老種對(duì)比,確定了一個(gè)新種Nilssonia xinlinhotensis sp.nov.。最后,討論了Nilssonia和Nilssoniopteris的時(shí)空分布規(guī)律,Nilssonia屬在我國無論北方地區(qū)還是南方地區(qū)都是從西向東的演化趨勢(shì);Nilssoniopteris屬從包括中國南方在內(nèi)的歐洲-中國區(qū)向北遷移到中國北方及俄西伯利亞地區(qū),最后在早白堊世時(shí)僅存在于中國東北及西伯利亞東部地區(qū)。兩個(gè)屬的興衰階段具有明顯的差異,具有互為消長(zhǎng)的特點(diǎn)。
[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.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P534.52;Q914

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 商平,付國斌,侯全政,鄧勝徽;新疆吐哈盆地中侏羅世植物化石[J];現(xiàn)代地質(zhì);1999年04期

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本文編號(hào)：2285350