| 辽宁田师傅早中侏罗世植物群 |
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| 引用本文： | 郑少林,张武.辽宁田师傅早中侏罗世植物群[J].国土资源,1990(3). |
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| 作者姓名： | 郑少林 张武 |
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| 作者单位： | 沈阳地质矿产研究所，沈阳地质矿产研究所 |
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| 摘 要： | 田师傅植物群系我国北方典型的早中侏罗世植物群之一,产自辽宁本溪田师傅盆地及风城赛马-(?)阳盆地的下侏罗统长梁子组、中侏罗统大堡组及三个岭组。该植物群由34属77种植物组成。本文通过含植物化石地层剖面简介阐明化石的产地和层位,对以往的化石名单进行修订,对部分重要化石作了描述。
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| 关 键 词： | 田师傅 早中侏罗世 植物群 |
EARLY AND MIDDLE JURASSIC FOSSIL FLORA FROM TIANSHIFU LIAONING |
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| Zheng Shaolin, Zhang Wu,.EARLY AND MIDDLE JURASSIC FOSSIL FLORA FROM TIANSHIFU LIAONING[J].Land & Resources,1990(3). |
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| Authors: | Zheng Shaolin Zhang Wu |
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| Institution: | Shenyang Institute of Geology and Mingral Resouses |
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| Abstract: | The paper is the first of a series of report dealing with the Early and Middle Jurassic fossil plants of Tianshifu and Saima Basins in Liaoning Province. These plant -bearing strata can be divided into three Formation in descending order as follows: (?) total thickness 292.70m total thickness 645.58m (?) total thickness 589.27m Ordovician System: limestone In this paper total 34 genera and 77 species of plants are collected and partly described or figured ,with the establishment of three fossil assemblages based on fossil occurrences and their associate characters. Through of these fossil plant assemblages by the writers, some new knowledge has been added to the studies on the age of the strata. Williamsoniella dabuensis sp. nov. (P1.5,fig. 7A; Text-fig. 3) A few detached microsporophylls. The microsporophylls are inverted oval or hooked in outline with an attenuated stalk, about 2 cm long,8-10mm wide below, tapering. The substance is rather thick and the surface is dull (not glistening) and marked with little lumps. On the adaxial side the upper appendage at least nearly always project.The upper side bearing pollen sacs(synangia)in two longitudinal rows. The sacs flattened, nearly the disk-shape, attached at laterals of a fine edge. Discussion and Comparison. Gynoecia and involucral bracts of the new species are unknown, but a few detached segments of blacts were found closely associated with the microsporophylls in part of the Tianshifu Plant Bed. Therefore they may have been a part of the hermaphrodite flower. In Williamsoniella coronata Thomas (Harris, 1969, P. 143; Text-fig. 61) such bracts are known still attached to the flower and also there are similar isolated ones lying near the flower. W. papillosa Cridland also consists of gynoecia and a few detached microsporophylls. The microsporophylls of the new species rather like those of W. vachrameevii Orlovskaja (Doludenko, Orlovskaja,1976, P. 56; P1. 18, figs. 5-7; Text-fig. 25), but the latter is much larger than the new species and the shape also is very diffe- rent. |
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| Keywords: | Tianshifu Early and Middle Jurassic Fossil flora |
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