滇西景星组双壳类动物群的固有属性  

ON THE INNANTE ATTRIBUTE OF THE BIVALVE FAUNA OF THE JINGXINAG FORMATION FROM WEST YUNNAN

作　　者：郭福祥[1] 

机构地区：[1]桂林工学院隐伏矿床预测研究所

出　　处：《桂林工学院学报》1997年第3期195-203,T001,共10页Journal of Guilin University of Technology

摘　　要：滇西景星组双壳类是以Ｐｅｒｇｒｉｎｏｃｏｎｃｈａ－Ｓｉｎｏｎａｉａ－Ｋｏｒｅａｎａｉａ－Ｅｏｎｉｐ－ｐｏｎｏｎａｉａ－Ｐｌｉｃａｔｏｕｎｉｏ为代表的地方性动物群，属非海生类三角蚌类系统演化的早白垩世产物。景星组属于亚洲地方性的非海相三分白垩系的下白垩统，可与滇中的高峰寺组－普昌河组、青海南部的雁石坪群上段（扎窝茸组）和藏东的多尼组对比。该组双壳类曾被误认为晚侏罗世海生动物群，是因为Ｓｉｎｏｎａｉａ和Ｅｏｎｉｐｐｏｎｏｎａｉａ被误定为Ｇｏ－ｎｉｏｍｙａ；Ｎａｋａｍｕｒａｎａｉａ被误定为Ｑｕｅｎｓｔｅｄｔｉａ，Ｔａｎｃｒｅｄｉａ和Ａｎｉｓｏｃａｒｄｉａ；Ｙｕｎｎａｎｏｃｏｎ－ｃｈａ被误定为Ｐｌｅｕｒｏｍｙａ；Ｍｙｔｉｌｕｓ被误定为Ｆａｌｃｉｍｙｔｉｌｕｓ和Ｌｙｃｅｔｉａ的缘故。该动物群中的最重要的代表Ｐｅｒｅｇｒｉｎｏｃｏｎｃｈａ，见于滇中、滇西、青南和藏东，曾一度被误认为Ｖａｕｇｏｎｉａ和Ｓｙｒｏｔｒｉｇｏｎｉａ。这是把景星组双壳类误解为晚侏罗世海生动物群的重要原因。实际上，Ｐｅｒｅｇｒｉｎｏｃｏｎｃｈａ是类三角蚌类，其内部形态与Ｗａｋｉｎｏａ基本相同。The bivalve fauna represented by Peregrinoconcha-Sinonaia-Koreanaia-Eonippo-nonaia-Plicatounio from the Jingxing Formation of west Yunnan is a famous endemic fauna It is pointed out that the fauna belongs to Early Cretaceous phylogenetic products of the nonmarine trigonioidaceans The Jingxing Formation is the Lower Cretaceous (Neocomian) of the Asian endemic nonmarine tripartite Cretaceous It can be correlated with the Gaofengsi and Puchanghe formations in central Yunnan, the upper member (Zhaworong Formation) of the Yanshiping Group in south Qinghai and the Duoni Formation in east Tibet The bivalves of the Jingxing Formation were misunderstood to be the marine Late Jurassic fauna because Sinonaia and Eonippononaia were misidentified with Goniomya , Nakamuranaia with Quenstedtia, Tancredia and Anisocardia,Yunnanoconcha with Pleuromya and Mytilus with Falcimytilus and Lycettiea The most improtant representative Peregrinoconcha , which is distributed in west central Yunnan, south Qinghai and east Tibet, was mistaken for Vaugonia and Syrotrigonia before This misidentification is the important cause misunderstangding the bivalves of the Jingxing Formation as a marine Late Jurassic fauna In fact, Peregrinoconcha belongs to trigonioidaceans as it is fundamentally the same as Wakinoa in interior morphology

关 键 词：古动物 双壳类 动物群 三角蚌类 侏罗系 白垩系 

分 类 号：Q915.652[天文地球—古生物学与地层学] Q915.653[生物学—古生物学]