| 关于强壮弓笔石(Cyrtograptus robustus)的补充研究 |
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| 引用本文： | 王健,孟勇,王欣,黄洪平,傅力浦,张欣.关于强壮弓笔石(Cyrtograptus robustus)的补充研究[J].地质通报,2011,30(8):1233-1237. |
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| 作者姓名： | 王健 孟勇 王欣 黄洪平 傅力浦 张欣 |
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| 作者单位： | 中国地质调查局西安地质矿产研究所,陕西西安,710054 |
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| 基金项目： | 中国地质调查局项目《陕西1:5万高滩幅、观音堂幅区域地质调查》，《中国中志留统上部层位建阶研究》 |
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| 摘 要： | 在陕西紫阳新发现一块更为完整的强壮弓笔石(Cyrtograptus robustus)化石,对其始部、主枝、幼枝、胞管等特征进行了描述和数据统计,并与国内外相似的弓笔石进行对比。该种弓笔石主枝较宽,一级幼枝发育,相邻幼枝间隔胞管数为1~7个不等,随着主枝的延伸相邻幼枝间隔胞管数增大。笔石体没有二级幼枝,胞管形态为较矮的三角形。该种化石的补充研究为C. lapworthi带的弓笔石种类和弓笔石早期发育情况的研究提供了重要的基础资料。
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| 关 键 词： | Cytrograptus robustus 弓笔石 志留系 陕西紫阳地区 |
Further studies of Cyrtograptus robustus |
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| WANG Jian,MENG Yong,WANG Xin,HUANG Hong-ping,FU Li-pu,ZHANG Xin.Further studies of Cyrtograptus robustus[J].Geologcal Bulletin OF China,2011,30(8):1233-1237. |
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| Authors: | WANG Jian MENG Yong WANG Xin HUANG Hong-ping FU Li-pu ZHANG Xin |
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| Institution: | WANG Jian,MENG Yong,WANG Xin,HUANG Hong-ping,FU Li-pu,ZHANG XinXi'an Institute of Geology and Mineral Resources,China Geological Survey,Xi'an 710054,Shaanxi,China |
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| Abstract: | A complete specimen of Cyrtograptus robustus Fu, 1986 was discovered in Ziyang County of Shaanxi Province. In this paper, the specimen is described, and characteristics of main stipe, cladium and thecal of Cyrtograptus robustus are restudied. The main stipe is wider than other Cyrt. sp., and the number of thecae between successive cladium of Cy. robustus becomes larger from the proximal part to the distal end. There are more first cladiums, but with no second cladium. |
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| Keywords: | Cyrtograptus robustus graptolite Silurian Ziyang area Shaanxi |
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