| 湘西花垣中寒武统具表面装饰的管状微体化石 |
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| 引用本文： | 朱才伐,李国祥,董熙平.湘西花垣中寒武统具表面装饰的管状微体化石[J].北京大学学报(自然科学版),2004,40(2):193-202. |
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| 作者姓名： | 朱才伐 李国祥 董熙平 |
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| 作者单位： | 北京大学地球与空间科学学院地质学系，北京，100871；石油大学北京资源与信息学院，北京，102200；中国科学元南京地质古生物研究所，南京，210008 |
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| 基金项目： | 国家自然科学基金，高等学校博士学科点专项科研项目，中国科学院实验室基金 |
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| 摘 要： | 对采自湘西花垣县排碧剖面中寒武统花桥组灰岩中具表面装饰的磷灰石质管状化石（Ornamented tubes）进行了研究，依据化石的壳面装饰特征，建立了3形态类型：Ornamented Tube Form Ⅰ，Ornamented Tube Form Ⅱ 和 Ornamented Tube Form Ⅲ。其中Ⅰ型壳体表面装饰有尖细的小刺，多数标本壳刺成行排列，行间存在宽约0.01～0.05 mm的间隔；Ⅱ 型管体表面具有零散稀疏而不规则分布的斑疹状壳饰，壳体微微向外弯曲的一侧具有一列粗壮的呈锯齿状排列的脊刺；Ⅲ型整个壳体表面布满圆形、卵圆形瘤状壳饰，壳饰中空，与壳体内腔相通，壳体微微向外弯曲的一侧具有一列粗壮的呈羽状排列的脊刺。从壳体形态、表面装饰特征分析，这类管状化石可能是节肢动物(如高肌虫类)生物体壳瓣上的前刺或背部的刺等管状硬体构造。
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| 关 键 词： | 中寒武世 管状化石 湘西 |
| 收稿时间： | 2003-02-17 |
Ornamented Tubes from Middle Cambrian of Huayuan, West Hunan, China |
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| ZHU Caifa , LI Guoxiang DONG Xiping.Ornamented Tubes from Middle Cambrian of Huayuan, West Hunan, China[J].Acta Scientiarum Naturalium Universitatis Pekinensis,2004,40(2):193-202. |
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| Authors: | ZHU Caifa LI Guoxiang DONG Xiping |
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| Institution: | Department of Geology, School of Earth and Space Sciences, Peking University, Beijing, 100871; University of PetroleumBeijing, Beijing, 102200; Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, 210008 |
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| Abstract: | The problematic phosphatic tubular microfossils with ornamented sculptures documented herein were collected from limestones of the Middle Cambrian Huaqiao Formation in the Paibi section, Huayuan County, Hunan Province, China. Three morphological patterns, including Ornamented Tube Form Ⅰ, Ornamented Tube Form Ⅱ and Ornamented Tube Form Ⅲ are described, and their biological affinities are briefly discussed. Based on the features of ornamented sculptures of the fossils, the authors tentatively suggest that these ornamented tubes may represent carapace spines of some Cambrian bradoriid crustaceans. |
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| Keywords: | Middle Cambrian Ornamented tubes West Hunan |
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