| 鲁西地区寒武纪原始真牙形石分类方案的探讨 |
| |
| 引用本文： | 武桂春,姚建新,纪占胜.鲁西地区寒武纪原始真牙形石分类方案的探讨[J].地质学报,2004,78(3):289-295,i001. |
| |
| 作者姓名： | 武桂春 姚建新 纪占胜 |
| |
| 作者单位： | 1. 中国地质科学院地质研究所,北京,100037;北京大学地球与空间科学学院,100871
2. 中国地质科学院地质研究所,北京,100037 |
| |
| 基金项目： | 国家自然科学基金项目 (编号 40 3 0 2 0 0 2 )的资助成果 |
| |
| 摘 要： | 鲁西地区晚寒武世地层发育，产有数量丰富、分异度大的原始真牙形石分子，经笔者研究，建立了2新属、2新种及2未定种Camconodontus rotundatus geo et sp．nov．，Camconodontus sp．，Laiwunodus lateronodus gen et sp．nov．，Laiwunodus sp．；对Das ytodus属进行了补充修订，建立了1新种Dasytodus posteronodus sp．nov．。这些属种的建立丰富了对已有原始真牙形石概念的认识。基于内部构造的观察，对原始真牙形石及部分易混淆的副牙形石进行正确的分类。以此为基础，分析、总结了这些分子外部形态上的差异，选用的分类原则和标准是从一般到特殊、特征明显程度逐渐降低，划分出了三类原始真牙形石和一类副牙形石，这在很大程度上简化了早期真牙形石分类研究的复杂性，为早期真牙形石的深入研究奠定了基础。
|
| 关 键 词： | 晚寒武世 原始真牙形石 副牙形石 鲁西地区 生物地层划分 |
A Taxanomic Study on Primitive Euconodonts |
| |
| WU Guichun,YAO Jianxin ,JI Zhansheng Institute of Geology,Chinese Academy of Geological Sciences,Beijing, Peiking University.A Taxanomic Study on Primitive Euconodonts[J].Acta Geologica Sinica,2004,78(3):289-295,i001. |
| |
| Authors: | WU Guichun YAO Jianxin JI Zhansheng Institute of Geology Chinese Academy of Geological Sciences Beijing Peiking University |
| |
| Abstract: | Primitive euconodonts are extrmely abundant and varied in the Late Cambrian in western Shandong Province. Two new genera are established, including Camconodontus gen. nov. and Laiwunodus gen. nov. Among them the following species are described: Camconodontus rotundatus gen. et sp. nov., Camconodontus sp., Laiwunodus lateronodus gen. et sp. nov., and Laiwunodus sp.. In addition, the Genus Dasytodus is emended, with Dasytodus posteronodus sp. nov. being added. The discovery of new species has greatly enriched and deepened the already known concept about primitive euconodonts. The study of the internal structure of conodonts faciliatates the differentiation among primitive euconodonts as well as part of paraconodonts more correctly. Together with the internal struture, some important morphological characteristics are selected. Three types of primitive euconodonts and one type of paraconodonts easily confused with each other are differentiated, making the complexity on primitive euconodont taxa greatly simplified. And this work will bring much convenience to further studies on other related problems. |
| |
| Keywords: | western Shandong Late Cambrian primitive euconodonts paraconodonts taxonomy |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地质学报》浏览原始摘要信息 |
| 点击此处可从《地质学报》下载免费的PDF全文 |
|
