滇东富源地区晚二叠世栉羊齿属研究

发布时间：2018-03-24 05:39

本文选题：栉羊齿属　切入点：晚二叠世　出处：《昆明理工大学》2017年硕士论文

【摘要】：滇东地区的二叠纪地层连续且分布广泛,动植物化石丰富,研究历史悠久,主要集中于植物群整体讨论与对比方面,而有关其植物学性质、演化意义的深入探讨及植物繁殖器官等方面研究较少,对栉羊齿属的系统研究更是鲜有报道。本文系统研究了富源地区晚二叠世栉羊齿属Pecopteris的营养羽片和繁殖羽片的化石标本,栉羊齿属共87块标本,裸羽片标本56块鉴定出11个种,实羽片31块鉴定出4个种,系统描述了富源地区Pecopteris的形态特征,并对属种特征进行详细的比较与讨论。文中还对中国晚古生代栉羊齿属的多样性及时空分布进行了系统阐述,大致的分布情况为:早石炭世到晚二叠世栉羊齿属在中国的分布范围逐渐扩大,晚二叠世达到最大;多样性也呈上升趋势,晚二叠世达到顶峰。栉羊齿属的起源与发展在我国南、北方存在明显的区别,北方早石炭世栉羊齿属开始出现,随后逐渐增加,繁盛于早二叠世,中二叠世开始呈衰减的趋势;南方早二叠世才开始有少量栉羊齿属分子的分布,随后快速辐射到南方大部分地区,晚二叠世时南方栉羊齿属最为繁盛。对比古地理、古气候及古构造认为与栉羊齿属的多样性及时空分布存在耦合关系。
[Abstract]:The Permian strata in eastern Yunnan are continuous and widely distributed, with abundant flora and fauna fossils. The study has a long history and is mainly focused on the whole discussion and correlation of flora, and on its botanical properties. There are few studies on the evolutionary significance and reproductive organs of plants, especially on the systematic study of the genus Ctenodon. In this paper, the fossil specimens of vegetative pinnae and reproductive pinnae of Pecopteris of late Permian in Fuyuan region were systematically studied. A total of 87 specimens of the genus Ctenopharyngodon, 56 specimens of naked pinnae and 31 pieces of solid pinnae were identified. The morphological characteristics of Pecopteris in Fuyuan area were systematically described. The diversity and spatiotemporal distribution of the late Paleozoic genus Ctenophora in China were also discussed. The distribution of the genus Carboniferous from the early Carboniferous to the late Permian gradually expanded in China, and reached its maximum in the late Permian. The origin and development of the genus Carboniferous in the south of China is different from that in the north. The early Carboniferous genus began to appear in the north, then increased gradually, and flourished in the early Permian and began to decline in the Middle Permian. It was only during the early Permian in the South that a small number of the molecules of the genus Ctenodon began to distribute, and then rapidly radiated to most parts of the South, and in the late Permian, the genus Ctenophora was the most prosperous. Compared with paleogeography, Paleoclimate and paleotectonics are thought to have a coupling relationship with the diversity and temporal and spatial distribution of the genus Ctenodon.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：Q914

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