地学前缘(中国地质大学(北京)；北京大学)EarthScienceFrontiers(ChinaUniversityof(；eo、ciences(Beijing);PekingUniversity)DOI：10.13745/j.csf.sf.2020.6.7云南曲靖刘家冲剖面关底组中的鱼类微体化石及其地层学意义王建华'，赵文金a"*,朱敏234,李强】.2,蔡家琛2.3.4,张娜5,彭礼健I,罗彦超2341.曲靖师范学院1*1然历史文化研究中心.云南曲靖6550】】中国科学院占脊椎动物与占人类研究所中国科学院样椎动物演化与人类起源推点实技室.北京1000442.中国科学院生物演化与环境卓如创新中心.北京100044中国科学院大学.北京100()493.云南大学深时陆地生态研究所，云南昆.明650091WANGJianhua1，ZHAOWenjin2-3-4,”・ZHUMin2,3-4,LIQiang^・CAIJiachcn2-3*4・ZHANGNa5,PENGLijian1，LUOYanchao2,3-41.ResearchCenterofNaturalHistoryandCultureQujingNormalUni^ersiiy.655011.(hinaKeyiMboratoryofVertebrateEvolutionandHumanOriginsofChineseAcademyofSiiences；bislituteofVertebratePaleoniolo^yandPaletMinthro/xtlogy.ChineseAcademyofSciences.Beijing100()44.China2.CenterforExcellenceinLifeatulPaleoenvironment.(hineseAcademyofSciences.Beijing100()44.(hinaUnixrrsityofChineseAcademyofSciences.Beijing100049.China3.histiluieofDeepTimeTerrextrialEcology.YunnanUniversity,Kunming650()91.ChinaWANGJianhua.ZHAOWcnjin.ZHUMin.ctal.MicrovertebrateremainsfromtheKuantiFormationoftheLiujiachongSectioninQujing.Yunnanandtheirstratigraphicsignificance.EarthScienceFrontiers.2020.27(6):329-340Abstract:TheKuantiFormation,withthediscoveryoftheXiaoxiangVerlcbatcFaunain2007.hasbecomethefocusofglobalresearchonearlyvertebrates.However,itsstratigraphicsulxiivision,correlationandage,especiallythesulxlivisionandageofitslowerpart.remaincontentious.despitemanybiostratigraphicattemptsmadesince1914.Inreccnlyears,weconductedaseriesofextensivegeologicalinvestigationsintheKuantiFormationneartheXiaoxiangReservoirinQujing.YunnanProvince.Basedon(herecentlyobtaineddatafromtheLiujiachongSection(dominatedbythelowerpartoftheKuantiFormation)andthepreliminarystudyofthenewlydiscoveredmicrovertebrateremains,wedocumentedthesequenceoftheKuanliF-ormationoftheLiujiachongSection,andfurtherexploredthegeologicalageoftherelatedstrata.TheKuantiFormationoftheLiujiachongSectioncanbesubdividedintothreemembers,inascendingorderaccordingtothemainlithologicalchanges：MemberI(YucjiashanMember)・MemberII(ChongjiawanMember).andMemberIII(CailianMember).ThelowerpartofMemberIischaracterizedbylightyellowandyellow-greengravellysiltymudstonesandcalcareoussiltstoneslackinganyfossils,whiletheupperpartiscomposedofdarkgreyandgrey-blackcarbonaceousshaleswithrareLingulasp.andbivalves.MemberIIisdominatedbygrey-greenandpurple-redshales,intercalatedwithlightgreythin-beddedorlenticular收稿日期：2020-03-25：修回日期：2()20051«基金项目：中国科学院战略性先导科技专项(B类、A)(XDB26000000.XDA19050102)iR家H然科学基金顼11(41530102.41972006)：中国科学院前沿科学爪点研究项IKOYZDJSSWDOC002)：中国科学院占生物化上发掘与修理弓项(KL213406)：Z南行堡础研充计划N年项目(202001AU070145)作者简介：壬建华(1987).男.必级「.程帅.主要从事与古育推动物学相关的地层学和古地理学研究。Emailiwangjianhua^mail.qjnu.edu.cn•通信作者简介：赵文金(1968).通•研究员，博士生导帅.主要从事通育推动物学及相关的地层学、占动物地理学研究。Emaihzhaowenjin@ivpp.ac.cn第27卷第6期2020年11月F志留纪普里道利世（Pridcli.Silurian）早泥盆世布拉格期（Pragian*EarlyDevonian）的地层中.目前我国最早的我棘鱼,即迭部背糠鱼（t^nensis）出现「•志带纪温洛克世晚期（LateWenlock）""1.本文中新发现的背糠鱼...