湖北宜昌黄花场中/下奥陶统界线附近几丁虫组合及其地层学意义THE CHITINOZOAN ASSEMBLAGES ACROSS THE LOWER-MIDDLE ORDOVICIAN BOUNDARY AT THE HUANGHUACHANG SECTION OF YICHANG, HUBEI, AND ITS STRATIGRAPHICAL SIGNIFICANCE
陈孝红,汪啸风,李志宏,王传尚,张淼
摘要(Abstract)：
对宜昌黄花场大湾组下段牙形石 Oepikodus evae带至 Baltoniodus triangularis带系统采集与分析几丁虫样品 ,共发现几丁虫 6属 12种 ,其中包括 1个相似种、1个未定种 ,它们是 Conochitina raymondii,C.ordinaria,C.primitiva,C.langei,C.brevis,C.poumoti,C.decipiens,Belonechitina cf.micracantha,L agenochitina esthoni-ca,L.sp.,Eremochitina baculata和 Cyathochitina dispar等。根据上述几丁虫的地质和地理分布特征 ,自下而上可划分为 Conochitina langei带和 Eremochitina baculata带 ,讨论并指出了他们与相关笔石、牙形石生物带的关系
关键词(KeyWords)： 大湾组;中/下奥陶统界线;奥陶系;几丁虫;宜昌;湖北
基金项目(Foundation): 中国地质调查局地质调查项目 (编号 :2 0 0 113 90 0 0 72 )资助
作者(Author): 陈孝红,汪啸风,李志宏,王传尚,张淼
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