二叠纪末大灭绝后双壳类新的辐射  

A Bivalve Radiation after the End-Permian Extinction

作　　者：陈金华[1] F.史蒂勒 小松俊文[1] 

机构地区：[1]中国科学院南京地质古生物研究所,南京210008 [2]德国明斯特大学地质古生物研究所

出　　处：《科学技术与工程》2003年第5期415-416,420,共3页Science Technology and Engineering

基　　金：国家自然科学基金(40172003;49672006);国际合作交流基金;国家重点研究发展规划(G2000077700)资助

摘　　要：研究了二叠纪未生物大灭绝事件后双壳类的首次辐射,辐射的代表是贵州青岩地区中三叠世Anisian晚期的青岩生物群,共50余属100余种,归在5亚纲10目18超科32科。以往通常认为双壳类的辐射发生在晚三叠世,以阿尔卑斯地区圣·卡息安生物群为最早代表;但根据研究,大灭绝后双壳类的首次辐射时代比以往认为的圣·卡息安生物群早约1000万年。A first bivalve radiation after the end-Permian mass extinctinn in south China has been studied. The representative fanna is that from Qingyan, Guizhou province, southwestern China, dated as Late Anisian, composed of nearly 100 species assigned to more than 50 genera, belonging to 32 families of 5 subclasses in Bivalvia. Previously the radiation of some benthic lineages such as bivalves, brachiopods, and bryozoans was considered to be 'delayed until the Ladinian or even later' (e. g. Hallam and Wignall, 1997); that was probably inferred depending mainly on the St. Cassian fauna of Alps. However, according to the new data the first radiation of bivalves after the crises happened in the time about 10 Ma earlier than previously regarded.

关 键 词：二叠纪 辐射 双壳类 贵州 青岩 

分 类 号：P534.51[天文地球—古生物学与地层学]