新疆塔里木盆地中部和北部台地上奥陶统良里塔格组岩心中的泡孔目、隐口目和窗孔目苔虫  

BRYOZOANS(CYSTOPORIDA, CRYPTOSTOMIDA AND FENESTRIDA) FROM THE CORES OF THE LIANGLITAG FORMATION(UPPER ORDOVICIAN) IN THE CENTRAL AND NORTHERN TARIM BASIN, XINJIANG, NW CHINA

作　　者：昌新玲[1] 杨海军[2] 杨芝林[2] 丁旋[1] 吴亚生[3] 

机构地区：[1]中国地质大学(北京),北京100083 [2]中国石油天然气股份有限公司塔里木油田分公司勘探开发研究院,新疆库尔勒841000 [3]中国科学院地质与地球物理研究所中国科学院油气资源研究重点实验室,北京100029

出　　处：《微体古生物学报》2011年第4期411-428,共18页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金(40802001)资助成果

摘　　要：新疆塔里木盆地奥陶系良里塔格组礁滩相非常发育,部分地区泡孔目、隐口目和窗孔目苔虫化石非常丰富,本文首次系统描述了塔里木盆地巴楚-塔中和塔北碳酸盐台地部分取心井上奥陶统良里塔格组的泡孔目、隐口目和窗孔目苔虫7科11属13种,包括1个新种和6个未定种,分别为Lunaferamita nevadensis Utgaard,L. vesicu-larissp.nov.,L.sp.,Graptodictya meneghinii(Vinassa de Regny),Chazydictya sp.,Rhinidictya nicholsoni Ulrich,Metadictyacf.crassa(Hall),Trigonodictya acuta(Hall),Stictoporella sp.,Chasmatopora spatiosa Ariun-chimeg,Ralfinellasp.,Moyerella sp.,Moorephylloporina sp.。其中,隐口目细枝状的Rhinidictya和网状的Chasmatopora,Moorephylloporina在塔中和巴楚地区横向及纵向地层中分布非常广泛。Deposits of reef and bank facies are abundant in the Upper Ordovician in the Tarim Basin,Xinjiang.Bryo-zoan was one of the main invertebrate groups dominating the carbonate platforms during this time.However,the Up-per Ordovician bryozoans from the Tazhong and Tabei platforms in the Tarim Basin have received less attention in spite of their abundance in the carbonate units typical of the region.Cystoporate,cryptostome and fenestrate bryozo-ans are abundant and widely occur,though not the most diverse bryozoans comparing to Trepostomata,in the investi-gated location.Up to now,no systematical description work has been done about them.In this paper,cystoporate,cryptostome and fenestrate bryozoans,including 13 species belonging to 11 genera of 7 families,are described.They areLunaferamita nevadensisUtgaard,L.vesicularissp.nov.,L.sp.,Graptodictya meneghinii(Vinassa de Reg-ny),Chazydictyasp.,Rhinidictya nicholsoniUlrich,Metadictya crassa(Hall),Trigonodictya acuta(Hall),Sticto-porellasp.,Chasmatopora spatiosaAriunchimeg,Ralfinellasp.,Moyerellasp.andMoorephylloporinasp.The cystoporate genusLunaferamitahas the highest diversity,with 3 species described here.The new specie cystoporate Lunaferamita vesicularissp.nov.is characterized by the presence of a small and transcent core within the center of lunaria and the blister-like vesicles in cross section.The branched cryptostomeRhinidictya,reticulateChasmatopora andMoorephylloporinahave a wide geographical and stratigraphical distribution.Therefore,this study will benefit future stratigraphic and palaeobiogeographic correlation.

关 键 词：苔虫 泡孔目 隐口目 窗孔目 良里塔格组 上奥陶统 塔里木盆地 新疆 

分 类 号：P534.42[天文地球—古生物学与地层学]