| 豫西二叠纪含煤地层中Protoblechnum的新材料 |
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| 引用本文： | 孙柏年,沈光隆,何锡麟. 豫西二叠纪含煤地层中Protoblechnum的新材料[J]. 地球科学, 1999, 24(2): 161-166 |
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| 作者姓名： | 孙柏年 沈光隆 何锡麟 |
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| 作者单位： | 兰州大学地质系(孙柏年),西北大学地质系(沈光隆),中国矿业大学资源环境学院(何锡麟) |
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| 基金项目： | 兰州大学中青年学术骨干基金 |
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| 摘 要： | 豫西登封、宜阳一带二叠纪含煤地层中的植物化石Ｐｒｏｔｏｂｌｅｃｈｎｕｍ非常丰富．据初步研究,小羽片基部收缩的Ｐｒｏｔｏｂｌｅｃｈｎｕｍｃｏｎｔｒａｃｔｕｍ也是二次羽状复叶;小羽片基部呈双耳状的ＣｏｍｐｓｏｐｔｅｒｉｓｇｕａｎｇｄｏｎｇｅｎｓｉｓＦｅｎｇ和ＰｒｏｔｏｂｌｅｃｈｎｕｍｄｅｎｇｆｅｎｇｅｎｓｉｓＺｈａｎｇｅｔＹａｎｇ应归为一种．研究还表明,Ｐｒｏｔｏｂｌｅｃｈｎｕｍ及其类似植物或许如同晚古生代的脉羊齿类植物那样,羽轴既可分叉,亦可不分叉;蕨叶既有一次羽状复叶,也有呈多次羽状分裂．小羽片基部分别下延和收缩,但均为二次羽状复叶的Ｐｒｏｔｏｂｌｅｃｈｎｕｍｗｏｎｇｉ和Ｐｒｏｔｏｂｌｅｃｈｎｕｍｃｏｎｔｒａｃｔｕｍ,很可能代表着Ｐｒｏｔｏｂｌｅｃｈｎｕｍ向Ｓｕｐａｉａ演化的两个方向．
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| 关 键 词： | 植物化石 二叠纪 豫西 |
NEW MATERIAL OF Protoblechnum FROM PERMIAN COAL-BEARING STRATA IN WESTERN HENAN |
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| Sun Bainian,Shen Guanglong,He Xilin. NEW MATERIAL OF Protoblechnum FROM PERMIAN COAL-BEARING STRATA IN WESTERN HENAN[J]. Earth Science-Journal of China University of Geosciences, 1999, 24(2): 161-166 |
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| Authors: | Sun Bainian Shen Guanglong He Xilin |
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| Abstract: | There are a lot of fossils of Protoblechnum in the Permian coal_bearing strata in Dengfeng and Yiyang areas, Western Henan Province. In accordance with the preliminary study of this paper, Protoblechnum contractum (Gu et Zhi) which has a contracted base of pinnules is also bipinnatifid fronds; Compsopteris guangdongensis Feng and Protoblechnum dengfengensis Zhang et Yang, the base of whose pinnules shows a double_eared shape, should be merged into Protoblechnum guangdongense (Feng) comb. nov.. It may be seen that the frond structure of Protoblechnum and other similar taxa are similar to those of the neuropterids of the Late Palaeozoic, in that their rachides are forked or unforked and in that their fronds are either simple pinnae or pinnately compound leaves. The Protoblechnum wongii and Protoblechnum contractum are all bipinnatifid fronds, but the pinnule base of the former is decurrent and that of the latter is contracted. These two kinds of Protoblechnum may represent two evolutionary aspects from Protoblechnum to Supaia in botanical morphology. |
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| Keywords: | Protoblechnum |
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