首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 140 毫秒
1.
首次在山东馒头组上部发现徐庄期三叶虫Sinopagetiajinnanensis带和Sunaspis laevis-Sunaspidella rara带,其中Sunaspis laevis-Sunaspidella rara带从馒头组上部延伸到张夏组底部,也是迄今为止所发现的张夏组在华北地区最低层位。文中共描述三叶虫3目,10科,15属(亚属),14种,5未定种,1未定属种,其中有5新种:Sestrostega cylindricasp.nov.,Pseudinouyia shiliuyuanensis sp.nov.,Erratojincella?decorasp.nov.,Iranoleesia(Proasaphiscina?)subconicasp.nov.,Shanxiella(Shanxiella)latilimbatasp.nov.,对于华北地区与国内外同期地层对比及三叶虫的分类和系统演化具有重要意义。  相似文献   

2.
首次在山东馒头组上部发现徐庄期三叶虫Sinopagetiajinnanensis带和Sunaspis laevis-Sunaspidella rara带,其中Sunaspis laevis-Sunaspidella rara带从馒头组上部延伸到张夏组底部,也是迄今为止所发现的张夏组在华北地区最低层位。文中共描述三叶虫3目,10科,15属(亚属),14种,5未定种,1未定属种,其中有5新种:Sestrostega cylindricasp.nov.,Pseudinouyia shiliuyuanensis sp.nov.,Erratojincella?decorasp.nov.,Iranoleesia(Proasaphiscina?)subconicasp.nov.,Shanxiella(Shanxiella)latilimbatasp.nov.,对于华北地区与国内外同期地层对比及三叶虫的分类和系统演化具有重要意义。  相似文献   

3.
贵州省紫云县宗地剖面产出早石炭世大塘期至早二叠世栖霞期连续的<竹蜓>类化石序列.研究结果显示:该段地层中共产出<竹蜓>类36属453种(包括14个新种、14个亚种、47个相似种、18个变种以及30个未定种).依据化石组合特征,可以识别出13个<竹蜓>类化石带,从老至新为Eostaffella-Eostaffellina富集带,Pseudosta ffella富集带,Profusulinella deprati延限带,Profusulinella chaohuensis-P.fenghuangshanensis间隔带,Fusulina-Fusulinella富集带,Protriticites ziyunensis sp.nov.富集带,Triticites hobblensis延限带,Triticites panteleevi富集带,Spha-eroschwagerina subrotunda延限带,Eopara fusulina ovata富集带,Staffella-Pseudoendothyra组合带,Miselli-natermieri富集带,Misellina pamirensis-Misellina ovalis共存延限带.依据各带中的<竹蜓>类属种分布,宗地剖面的<竹蜓>类化石带序列可以很好地与中国华南、北美得克萨斯、日本中部和俄罗斯等地区同期的<竹蜓>类化石序列对比.  相似文献   

4.
贵州罗甸边阳镇关刀剖面三叠纪牙形石序列及阶的划分   总被引:9,自引:0,他引:9  
关刀剖面可初步划分15个牙形石带和动物群,自下而上为:Hindeodus parvus- H. anterodentatus组合带,Neospathodus dieneri延限带,Ns. pakistanensis间隔带( ?) ,Ns. waageni- Parachirognathus动物群,Ns.crassatus延限带,Ns.symmetricus- Ns .homeri间隔带,Chiosellati morensis延限带,Nicoraella germanicus- Nic .kockeli间隔带,Paragondolella bulgarica延限带,Neogondolella constricta间隔带,Ng. constricta cornuda间隔带,Budurovignathus truempyi延限带,Bv. hungaricus间隔带,Bv. mungoensis间隔带,Metapolygnathus polyg-nathiformis动物群。根据牙形石对比划分了阶。安尼阶(或青岩阶)底界年龄可能为247 Ma。  相似文献   

5.
贵州省紫云县宗地剖面产出早石炭世大塘期至早二叠世栖霞期连续的[竹蜓]类化石序列。研究结果显示:该段地层中共产出[竹蜓]类36属453种(包括14个新种、14个亚种、47个相似种、18个变种以及30个未定种)。依据化石组合特征,可以识别出13个[竹蜓]类化石带,从老至新为Eostaffella-Eostaffellina富集带,Pseudostaffella富集带,Profusulinella deprati延限带,Profusulinella chaohuensis-P.fenghuangshanensis间隔带,Fusulina-Fusulinella富集带,Protriticites ziyunensis sp.nov.富集带,Triticites hobblensis延限带,Triticites panteleevi富集带,Sphaeroschwagerina subrotunda延限带,Eoparafusulina ovata富集带,Staffella—Pseudoendothyra组合带,Misellina termieri富集带,Misellina pamirensis—Misellina ovalis共存延限带。依据各带中的[竹蜓]类属种分布,宗地剖面的[竹蜓]类化石带序列可以很好地与中国华南、北美得克萨斯、日本中部和俄罗斯等地区同期的[竹蜓]类化石序列对比。  相似文献   

6.
段冶 《古生物学报》2004,43(1):63-71
文中描记 3个多节类三叶虫新种 :Hardyoidesdamaensissp .nov .,Meringaspisdamaensissp .nov .,andRhyssometopus (Rostrifinis)nitidussp .nov .,均产自湘西凤凰花桥组中部。同时描记首次在江南斜坡带中发现的Erixanium一属的保留命名种Erixaniumcf.E .sentum。Erixanium是全球性分布的多节类三叶虫 。  相似文献   

7.
据贵州东部万山镇南部寄马冲至羊尾剖面晚寒武世早期车夫组三叶虫的新材料,对原太子河虫属(Protaitazuhoia Yang,1978)进行了修订。根据其尾部的特征,将其分类位置由原先的德氏虫科(Damesellidae Kobayashi,1935)移至鄂尔多斯虫科(Ordosiidae Lu,1954)。此外,还描述了原太子河虫2新种1新亚种:Protaitze-hoia latelimbata sp.nov.,Protaitzehoia nitida sp.nov.,Protaitzehoia quadrata jimachongensis subsp.nov。  相似文献   

8.
湘西北寒武系杷榔组出露较好,三叶虫化石十分丰富。文中报道描述了在花垣县排吾乡两个剖面的杷榔组泥页岩中采得的三叶虫两属两种Dinesus bura(Qiu,1980)和Eosoptychoparia guizhouensis Yuan in Zhang et al.,1980。本次研究将双岛虫属Dinesus在中国的地层延限下延至杷榔组(寒武系第二统第四阶)的中下部。这些新材料在湖南杷榔组的发现,扩大了这两属的地理分布范围,并提供了更多本区与其他地区的地层进行对比的材料。以上新发现更进一步丰富了寒武纪江南斜坡带杷榔组三叶虫动物群的内容。  相似文献   

9.
湘西北寒武系杷榔组出露较好,三叶虫化石十分丰富。文中报道描述了在花垣县排吾乡两个剖面的杷榔组泥页岩中采得的三叶虫两属两种Dinesus bura(Qiu,1980)和Eosoptychoparia guizhouensis Yuan in Zhang et al.,1980。本次研究将双岛虫属Dinesus在中国的地层延限下延至杷榔组(寒武系第二统第四阶)的中下部。这些新材料在湖南杷榔组的发现,扩大了这两属的地理分布范围,并提供了更多本区与其他地区的地层进行对比的材料。以上新发现更进一步丰富了寒武纪江南斜坡带杷榔组三叶虫动物群的内容。  相似文献   

10.
贵州三都、普安早奥陶世特马豆克早期三叶虫的新材料   总被引:1,自引:1,他引:0  
本文记述新发现于贵州三都、普安下奥陶统锅塘组下部的三叶虫,计8新种,分属于7属(其中1新属),即:Hospes guizhouensis (sp. nov.), H. sanduensis (sp. nov.), Pharostomina sanduensis (sp. nov.), Protarchaeganus sanduensis (sp. nov.), Pilekia transversalis (sp. nov.), Macropyge orientalis (sp. nov.), Guotangia guotangensis (gen. et sp. nov.), Leiagnostus sanduensis(sp. nov.)。在此7属中,Hospes, Pharostomina, Protarchaeganus, Pilekia四旧属在我国是首次发  相似文献   

11.
描述上扬子区鄂西和湘西中及晚奥陶世桨肋虫类三叶虫Hexacopyge的 5个种 ,包括 2新种 ,即H .turbiniformis和H .yichangensis;讨论Hexacopyge的定义及其与相关属的关系。Hexacopyge在区内分布广、演化快 。  相似文献   

12.
本文报道了陕西省南郑县梁山地区中奥陶统宝塔组介形类8属10种,其中包括3新属8新种。这些介形类化石的发现,为该时代地层的划分、对比增添了新的古生物依据。  相似文献   

13.
ORDOVICIAN NAUTILOID FAUNA FROM LUNSHAN, JURONG, JIANGSU   总被引:1,自引:0,他引:1       下载免费PDF全文
The fossil nautiloids described in this paper were collected in 1984 and 1985 from Lunshan, Jurong in Jiangsu; there the Ordovician strata are well developed and may be divided in descending order into seven formations as follows:Upper Ordovician: Wufeng Formation Tangtou FormationMiddle Ordovician Pagoda Formation Lower OrdovicianKuniutan FormationDawan FormationHunghuayuan FormationLunshan FormationThese nautiloids comprise 36 species belonging to 13 genera (including one new genus and 11 new species), namely,Middle OrdovicianPagoda FormationSinoceras chinense (Foord), Michelinoceras changjiangense Chen, densn (Y), M. paraelongatum Chang.Lower OrdovicianKuniutan FormationRhynchorthoceras jurongense sp. nov., R. lunshanense sp. nov., Dideroceras wahlenbergi (Foord), D. holmi Flower, Michlinoceras irregulare sp. nov., Kotoceras gaoluncunense sp. nov.Dawan Formation.Cochlioceras yantzeense Chang, Chisiloceras ichangense Wang, C. yaoshanense Qi, C. changyangense (Chang), Protocycloceras deprati Reed, P. hupehcnse (Shimizu and Obata), P. sichuanense Wang, P. remotum Lai, P. gangshanense sp. nov., P. siphosedimentum Pan, P. chaoi sp. nov., P.shishantouense sp. nov., P. gaojiabianense sp. nov., Changyangoceras gaojiabianense sp. nov., Gangshanoceras jurongense gen. et sp. nov., G. densum gen. et sp. nov., Michelinoceras cf. dayongense Lai, Troedssonella lunshanensis sp. nov., Mesosendoceras leei (Y), Vaginoceras peiyangense malukonense Chen, Dideroceras mui (Chang), D. gaoluncunense sp. nov.  相似文献   

14.
The Burrellian trilobite faunas of the Leinster terrane comprise at least 31 species from a spectrum of faunal associations. Strong faunal links with the Anglo-Welsh area confirm the likely close proximity of these parts of Avalonia during the mid Caradoc but together with existing magmatic and palaeomagnetic data, the Leinster faunas also indicate that the existing simple structural models of the relationship between these areas need to be reappraised. Of the 22 identifiable trilobite genera, eight are not known from equivalent or older horizons in the Anglo-Welsh area and indicate a significant link with Scoto-Appalachian faunas on the margins of Laurentia. This colonization by trilobites of Scoto-Appalachian origin may have been achieved by ‘volcanic island hopping’ across the shrinking Iapetus Ocean. The Leinster trilobites are therefore critical in documenting the breakdown of faunal provincialism and in fingerprinting the faunas and likely palaeogeographical setting of terranes now caught up in the Iapetus suture zone to the north. Eighteen species are described or discussed in detail including a new species of AmpyxinaA. hibernica sp. nov., a probable new species of Calyptaulax and revision of the M'Coy species Trinodus agnostiformis, Autoloxolichas laxatus, Flexicalymene forcipata Remopleurides platyceps.  相似文献   

15.
乌科剖面位于四川布拖县乌科乡境内。在此剖面的石门坎组上碎屑岩段中产有相当丰富的介形类丽足介目,特别是球茎介科的化石。经研究、鉴定,初步划分出2个属和6个种,其中包括3个新种(Entomozoe bispinosa sp.nov.,E.suboblongasp.nov.,E.wukeensis sp.nov.),1个比较种和2个未定种。在分析上述属、种,特别是相关种的地质、地理分布特征的基础上,并参考其他门类化石(如腕足类动物群)和岩石性质,提出石门坎组上碎屑岩段可能要低于笔石M.crispus带上部,大致相当于志留纪兰多维列世特列奇期早期。Entomozoe和球茎介科的最早代表推测是产自石门坎组上碎屑岩段Entomozoe的那些分子,如E.suboblongasp.nov.,而非E.tuberosa(Jones),1861(或其亲缘种E.aff.tuberosa)(Siveter et al.,1990,2006)。文中还就上述丽足介目动物群的生态环境进行了分析,指出石门坎组上碎屑岩段可能是在陆棚浅水到相对较深水、能量较低的、温暖的开阔海环境下沉积的。  相似文献   

16.
湖北宜昌黄花场早奥陶世疑源类的新类型   总被引:10,自引:3,他引:7  
该文报道了湖北宜昌黄花场下奥陶统大湾组下段的疑源类(海洋微体浮游植物化石)新类型,描述和建立3新属:Papilliferumgen.nov.,1gen.nov.和Yichangiagen.nov.;2新种:Papilliferumirregularegen。etsp.nov.,Yichangiabiporosagen;etsp。nov。及重新修改和组合的3属、种:Papilliferumrhabdocladium(Lu)comb.etemend.nov.,P。striatum(Lu)comb.etemend。nov。和Stelomorphaerchunensis(Fang)comb;etemend.nov.这些疑源类新类型目前仅见于我国西南的部分地区的早奥陶世地层。它们为探讨早奥陶世海洋微体浮游植物的区域分布及扬子地台的古地理位置,提供了重要的证据.  相似文献   

17.
新疆乌什下寒武统肖尔布拉克组软舌螺化石   总被引:2,自引:1,他引:1  
首次描述了采自新疆乌什县乌什磷矿肖尔布拉克组中部Kepingaspis-Tianshanocephalus带中的2个软舌螺新种Conotheca xinjiangensis sp.nov.,Nitorcornus wushiensis sp.nov.和下部Ushbaspis带中的1个软舌螺未定种Adyshevitheca?sp.。这些软舌螺化石材料为研究新疆乌什地区下寒武统中部地层与邻区相当层位的对比提供了新的证据,认为肖尔布拉克组中部2个三叶虫化石带和其中的软舌螺化石相当于我国扬子地台下寒武统沧浪铺阶中部,即乌龙箐亚阶和红井哨亚阶之间,可与俄罗斯西伯利亚和哈萨克斯坦下寒武统波特姆阶(Botomian)中的三叶虫带Ushbaspis和软舌螺带Erraticornus-Nitorcornus带对比。  相似文献   

18.
贵州关岭晚三叠世法郎组瓦窑段鱼类化石初步观察   总被引:5,自引:0,他引:5  
描述了关岭新铺地区晚三叠世法郎组瓦窑段中发现的鱼类5目5科5属5种和1未定种,其中1新属5新种,它们是Guizhoucoelacanthus guanlingensis Liu,Yin et Wang S Y gen.etsp.nov.,Birgeria guizhouensisLiu,Yin et Luo sp.nov.,Birgeriasp.,Pholidopleurus xiao waensis Liuet Yin sp.nov.,Peltopleurus brachycephalus Liu et Yin sp.nov.,Guizhoueugnathus largusLiu,Yinet Luo sp.nov.。关岭法郎组瓦窑段鱼类组合与邻区兴义晚三叠世法郎组竹杆坡段(卡尼早期)鱼类组合明显不同,瓦窑段的层位在竹杆坡段之上,其时代可能为卡尼中期。  相似文献   

19.
Abstract:  Brachiopods from the late Ordovician (late Caradoc) Dulankara Formation of the Chu-Ili Range, Kazakhstan, are reviewed. Those from the upper two members of the formation, the Degeres and Akkol members, are systematically described. New genera from the Dulankara Formation are Nikitinamena (Plectambonitoidea: Leptellinidae), with type species Nikitinamena bicostata sp. nov., and Weberorthis (Orthoidea: Plectorthidae), with type species Mimella brevis Rukavishnikova. Another new genus is Glyptomenoides (Strophomenoidea: Glyptomenidae), with type species Rafinesquina girvanensis Salmon from the Caradoc of Girvan, Scotland. Other new species from the Dulankara Formation are Holtedahlina orientalis , Platymena tersa , Christiania proclivis , Leangella ( Leangella ) paletsae , Metambonites subcarinatus , Ogmoplecia nesca and Plectorthis licta . The ecology and assemblages of all three members of the Dulankara Formation are identified or reviewed, and their palaeogeographical significance assessed: the Chu-Ili Terrane (on which the Dulankara Formation was situated during the Ordovician) formed part of the relatively low-latitude peri-Gondwanan complex of terranes, and was probably not far from North and South China. The faunal links suggested between the Dulankara brachiopods and contemporary faunas from Australia are now perceived to be weaker than previously thought.  相似文献   

20.
系统描述湖北宜昌和秭归新滩晚奥陶世庙坡组球接子类及多节类三叶虫动物群中的14种,分属于9属、7科、。根据化石保存状态、挤压变形以及个体发育特征,对前人所报道的产于本组的有关三叶早作了大量归并、转移和重新厘定,新的材料支持解释Telephiana longicephala的性双形现象。Atractopyge系首次在庙坡组中发现,以往它在三峡地区只见于临湘组。文中还将新疆的一个保留命名种Lonchodomas cf.yohi重新命名为Lonchodomas zhangi sp.nov.。  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号