| 陕北横山晚三叠世造迹鱼类恢复 |
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| 引用本文： | 王丽芳,卢宗盛,龚道好,陈斌,李富强.陕北横山晚三叠世造迹鱼类恢复[J].地球科学,2008,33(1):12-18. |
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| 作者姓名： | 王丽芳 卢宗盛 龚道好 陈斌 李富强 |
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| 作者单位： | 中国地质大学研究生院 湖北武汉430074(王丽芳)，中国地质大学地球科学学院 湖北武汉430074(卢宗盛，龚道好，陈斌，李富强) |
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| 基金项目： | 国家自然科学基金
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CNPC储层重点实验室项目 |
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| 摘 要： | 运用遗迹化石恢复造迹动物的形态结构是古遗迹学研究的难点.近年来在陕北横山晚三叠世地层中发现大量完好的鱼类游泳遗迹,能较好地恢复造迹鱼类鳍的着生位置及相关形态结构,确定造迹鱼的类型.通过游泳遗迹的形态结构与鱼类形态结构相互关系的分析,建立了游泳遗迹形态结构参数与造迹鱼类形态结构参数之间的数学关系式.通过计算显示同一遗迹种的鱼鳍间距与鱼体长度比值一定,这与现代鱼类形体特征一致.应用该方法恢复了研究区两遗迹种的造迹鱼类,其中Undichna britannica造迹鱼类的尾鳍和臀鳍间距与体长之比为0.3,臀鳍和胸鳍间距与体长之比为0.45～0.5,尾鳍和腹鳍间距与体长之比为0.49～0.5,与邻区相同层位发现的鱼类实体化石Wayaobulepis zichangensis相关特征一致.另一遗迹种Undichna tricosta恢复的尾鳍和臀鳍间距与体长之比约为0.35,可能与本区相同层位发现的Saurichthys huanshenensis特征相似.
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| 关 键 词： | 遗迹化石 鱼类 游泳遗迹 晚三叠世 陕西北部 |
| 文章编号： | 1000-2383（2008）01-0012-07 |
| 收稿时间： | 2007-03-08 |
| 修稿时间： | 2007年3月8日 |
Restoration of Late Triassic Fish Trace Makers in Hengshan County, Shaanxi Province, China |
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| WANG Li-fang,LU Zong-sheng,GONG Dao-hao,CHEN Bin,LI Fu-qiang.Restoration of Late Triassic Fish Trace Makers in Hengshan County, Shaanxi Province, China[J].Earth Science-Journal of China University of Geosciences,2008,33(1):12-18. |
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| Authors: | WANG Li-fang LU Zong-sheng GONG Dao-hao CHEN Bin LI Fu-qiang |
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| Abstract: | It is a palaeoichnological puzzle to restore the biological morphology of the trails makers by analyzing trace fossils. Many intact fish swimming trail fossils,which can reflect some biologic features of the trace-maker fish,such as body length,distribution of fish fins,shape and structure of fish fins,have been unearthed recent years from the Late Triassic of Hengshan County,Shaanxi Province. The mathematical formulations based on the analysis of the relationship between the morphological feature parameters of trace and trace producers indicate that,the certain ratio of the distance of fish fins and body length is consistent with that of modern fish. The result of the calculation of the data from fish swimming traces shows that,the trace Undichna britannica was made by these fishes,whose distance between caudal fin and anal fin is 0.3 of the body length,the distance between anal fin and pectoral fins is 0.5 of the body length,and the distance between caudal fin and ventral fins is between 0.49-0.5 of the body length. These features are consistent with the those of a fossil fish,named Wayaobulepis zichangensia sp. nov. in the stratum in close proximity to the trace fossil. The ratio of the distance between caudal fin and anal fin,resulted from the other trace Undichna tricosta,is about 0.35,which is similar with the features of the fossil fish named Saurichthys huanshenensis in the same stratum. |
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| Keywords: | trace fossil fish swimming trails Late Triassic northern Shaanxi |
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