昆明、武定地区早寒武世关山动物群的双瓣壳节肢动物  

NEW BIVALVED ARTHROPODS FROM THE EARLY CAMBRIAN GUANSHAN FAUNA IN THE KUNMING AND WUDING AREA

作　　者：罗惠麟[1] 傅晓平 胡世学[1] 李勇 陈良忠[1] 尤霆 刘琦[3] 

机构地区：[1]云南省地质科学研究所,昆明650051 [2]深圳古生物博物馆,广东深圳518004 [3]中国地质大学地球科学学院,武汉430074

出　　处：《古生物学报》2006年第4期460-472,共13页Acta Palaeontologica Sinica

基　　金：科技部重大基础前期研究专项(2002CCA033000)项目;现代古生物学和地层学国家重点实验室(中国科学院南京地质古生物研究所)(053110)项目;云南省地质科学研究所与深圳古生物博物馆合作开展的"云南早寒武世关山动物群"研究项目资助课题

摘　　要：报道采自昆明、武定地区下寒武统沧浪铺阶乌龙箐组下部黄绿色页岩层中的双瓣壳节肢动物Tuzoia和Isoxys,讨论Tuzoia和Isoxys两属的特征和种群、地质、地理分布、软体附肢、分类位置、古生态及其演化趋势。详细描述关山动物群中Tuzoia和Isoxys的3种(其中2新种):TuzoiasinensisP’an,1957,T.tylodesaLuoetHusp.nov.,IsoxyswudingensisLuoetHusp.nov.,和I.sp.。Wu report the new materials of two bivalved arthropods, Tuzoia and Isoxys, from the greenish mudstones of the lower part of the Wulongqing Formation, Canglangpuian, Lower Cambrian in Kunming and Wuding area. The generic characteristics, geological and geographic distribution, soft tissues, taxonomic position, paleoecology, and the evolution trend of the two bivalved arthropods are also discussed. Three species （including 2 new species） of Tuzoia and Isoxys from the Guanshan Fauna are described in detail, including Tuzoia sinensis Pan, 1957, T. tylodesa Luo et Hu sp. nov., Isoxyswudingensis Luo et Hu sp. nov. and I. sp. The discovery and study of the bivalved arthropods from the Guanshan Fauna adds new members to the taxonomic list of the Guanshan Fauna, and bridged the gap between the Chengjiang Fauna and the Kaili Fauna. This study provides new information to the origin, evolution, geological and geographic distribution of Tuzoia and Isoxys, and shed new light on the Cambrian explosion and the evolution of early life on earth.

关 键 词：关山动物群 双瓣壳节肢动物 吐卓虫(Tuzoia) 等刺虫(Isoxys) 早寒武世 昆明 武定 

分 类 号：Q915[天文地球—古生物学与地层学]