曲靖马龙一新的澄江动物群化石点记述  

Description of A New Fossiliferous Locality of the Chengjiang Biota from Malong in Qujing

作　　者：马昕莹 王珈琪 倪玲梅 MA Xinying;WANG Jiaqi;NI Lingmei(School of Biological Resource and Food Engineering,Qujing Normal University,Qujing Yunnan 655011;Institute of Palaeontology,Yunnan University,Kunming Yunnan 650500;School of Culture and Tourism,Qujing Normal University,Qujing Yunnan 655011,China)

机构地区：[1]曲靖师范学院生物资源与食品工程学院,云南曲靖655011 [2]云南大学古生物研究院,云南昆明650500 [3]曲靖师范学院文化旅游学院,云南曲靖655011

出　　处：《曲靖师范学院学报》2024年第6期29-41,共13页Journal of Qujing Normal University

基　　金：国家自然科学基金青年科学基金“重庆早侏罗世铰齿鱼类的形态学和系统发育研究”(42202016).

摘　　要：在曲靖马龙一个新发现的澄江动物群化石点中鉴定出5种节肢动物和1种软舌螺,分别为光滑马龙虫(Malungia laevigata)、马龙武定虫(Wutingaspis malungensis)、长尾纳罗虫(Naraoia longicaudata)、小昆明虫未定种(Kunmingella sp.)、云南鳃虾虫?(Branchiocaris?yunnanensis)和丰满三槽螺(Triplicatella opimus).光滑马龙虫数目最多,保存了成虫早期至晚期的背壳,马龙武定虫只保存了头盖.通过与马龙矿山剖面产出的澄江动物群化石对比,发现新化石点的层位时代要略早于马龙矿山,武定马龙虫的最早出现层位延伸至玉案山段下部.新化石点的化石分异度与马龙矿山略有差异,为研究滇东地区澄江生物群的物种多样性空间变化提供了新的信息.This paper describes five species of arthropods and one species of hyoliths:Malungia laevigata,Wutingaspis malungensis,Naraoia longicaudata,Kunmingella sp.,Branchiocaris?Yunnanensis,and Triplicatella opimus,collected from the lower part of the Yuanshan member of the Heilinpu Formation(Lower Cambrian)of the new outcrop of Malong,Qujing.All specimens are preserved without soft-part.The specimens of Malungia laevigata are in the highest number,with nearly complete dorsal exoskeletons,having different individual size in holaspid period,while in Wutingaspis malungensis,only cephalic shields are preserved.Compared with the specimens from the middle part of the Yuanshan member,the Heilinpu Formation of Kuangshan section,Malong,the geological age of the new fossiliferous locality is a bit older than Kuangshan section,indicating the first occurrence of Wutingaspis malungensis is earlier than previously speculated.The different diversity of species between the new fossiliferous locality and Kuangshan section provides new information for the study of spatial variation in species diversity and biotic composition of the Chengjiang Biota in southern Yunnan.

关 键 词：马龙 早寒武世 澄江动物群 形态学 

分 类 号：Q911.2[天文地球—古生物学与地层学]