| 下寒武统宽背虫(Bathynotus)的灭绝过程——以贵州剑河八郎凯里组的Bathynotus kueichouensis为例 |
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| 引用本文： | 王宇轩,赵元龙,彭进,李锋军.下寒武统宽背虫(Bathynotus)的灭绝过程——以贵州剑河八郎凯里组的Bathynotus kueichouensis为例[J].贵州工业大学学报(自然科学版),2008,37(1):6-11. |
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| 作者姓名： | 王宇轩 赵元龙 彭进 李锋军 |
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| 作者单位： | 1. 贵州大学资源与环境工程学院古生物及生物成矿研究所,贵州,贵阳,550003
2. 深圳仙湖植物园古生物博物馆,深圳,510084 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)
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贵州省科技特别基金 |
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| 摘 要： | 宽背虫(Bathynotus)这一传统早寒武世或寒武纪第2世晚期最重要的三叶虫属,广泛分布于全球寒武纪3个生物大区,为区域地层对比的标准化石.Bathynotus在贵州剑河八郎乌溜-曾家崖剖面凯里组下部极为丰富.该剖面已成为全球寒武系第2统和第3统界线层型候选剖面,表明凯里组是一个穿时的地层单元,其3个三叶虫带最下部一个带为Bathynotus holopygus-Ovatoryctocara granulata.经过逐层大量的化石标本采集统计证实,乌溜-曾家崖剖面宽背虫(Bathynotus)在距凯里组底部51.60 m处骤然绝灭,距寒武系第2统的顶界(距凯里组底52.80 m)只有1.20 m.本文就乌溜-曾家崖剖面凯里组下部宽背虫(Bathynotus)的数量分布变化认为其灭绝过程是逐步的.
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| 关 键 词： | 宽背虫(Bathynotus) 凯里组 寒武系 灭绝 贵州 |
| 文章编号： | 1009-0193(2008)01-0006-06 |
| 修稿时间： | 2007年12月18 |
Study and Analysis on Extinction of the lower Cambrian Index fossil Bathynotus:For Instance Bathynotus kueichouensis from Kaili Formation,Guizhou |
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| WANG Yu-xuan,ZHAO Yuan-long,PENG Jin,LI Feng-jnn.Study and Analysis on Extinction of the lower Cambrian Index fossil Bathynotus:For Instance Bathynotus kueichouensis from Kaili Formation,Guizhou[J].Journal of Guizhou University of Technology(Natural Science Edition),2008,37(1):6-11. |
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| Authors: | WANG Yu-xuan ZHAO Yuan-long PENG Jin LI Feng-jnn |
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| Institution: | WANG Yu-xuan1,ZHAO Yuan-long1,PENG Jin1,LI Feng-jun2 (1.School of Resource , Environment Engineering,Guizhou University,Guiyang 550003,China,2.Paleontological Museum of Shenzhen Xianhu Botanical Garden,Shenzhen,518004,China) |
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| Abstract: | Bathynotus is the most important trilobite genus as the late Cambrian 2 series.It is widely distributed in three realms of Cambrian in the world and has very important significance for subdivision of Cambrian stratigraphy in the world.Bathynotus from Kaili Formation at Wuliu-Zengjiaya Section Balang Village,Jianhe County,Guizhou Province are extremely rich and preserved a complete sequence of ontogeny.After specimens from a stratigraphical interval examined,we confirm that Bathynotus was extinct suddenly on... |
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| Keywords: | bathynotus kueichouensis kaili formation cambrian extinction Guizhou |
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