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1.
描述采自南澳东北部全地下沃伯顿盆地的Gidgealpa一号钻孔23号岩芯的寒武系第三统碳酸盐前缘斜坡相动物群,有11个球接子类群,包括新种Raragnostus shergoldi sp.nov.,和14个多节类三叶虫群,包括新种Dorypyge gidgealpaensis sp.nov.,Amphoton zangi sp.nov.,Solenoparia gatehousei sp.nov.和Lisania changi sp.nov.。在澳大利亚北部生物地层范围内,这一动物群隶属Undillan(Ptychagnostus punctuosus带,Doryagnostus deltoides带和Goniagnostus nathorsti带),并且可与江南斜坡带的P.punctuosus带和G.nathorsti带对比。  相似文献   

2.
描述采自南澳东北部全地下沃伯顿盆地的Gidgealpa一号钻孔23号岩芯的寒武系第三统碳酸盐前缘斜坡相动物群,有11个球接子类群,包括新种Raragnostus shergoldi sp.nov.,和14个多节类三叶虫群,包括新种Dorypyge gidgealpaensis sp.nov.,Amphoton zangi sp.nov.,Solenoparia gatehousei sp.nov.和Lisania changi sp.nov.。在澳大利亚北部生物地层范围内,这一动物群隶属Undillan(Ptychagnostus punctuosus带,Doryagnostus deltoides带和Goniagnostus nathorsti带),并且可与江南斜坡带的P.punctuosus带和G.nathorsti带对比。  相似文献   

3.
陕西南郑梁山早寒武世三叶虫   总被引:2,自引:0,他引:2  
陕西南郑梁山早寒武世三叶虫,曾经张文堂描述过两个种:Eoredlichia(Pachyredlichia)shensiensis Chang, Parabadiella huoi Chang。前者产下寒武统筇竹寺组上部,后者产中下部。本文描述的三叶虫,系产在Parabadiella huoi之下的黄绿色泥岩,是我国目前发现的最古老的三叶虫,与之共生的还有古介形虫。这些三叶虫经笔者研究计有:Parabadiella hanzhongends sp.nov., P. nanzhengensis sp. nov., P. zhongliangsiensis sp. nov., P. sp., Parabadiella (Danangouia) transversa subgen, et sp. nov., P. (Danangouia) quadrata subgen, et sp. nov., P. (Danangouia)sp.。  相似文献   

4.
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   

5.
李泉  彭善池 《古生物学报》2006,45(4):540-548
安徽淮南八公山地区寒武纪毛庄-徐庄期地层出露良好,化石丰富。在老鹰山剖面徐庄组底部的紫色页岩内所采集大量三叶虫标本中发现的一种新的三叶虫,命名为Huaiaspishuainanensisgen.etsp.nov.,它代表了一个尚未描记的且科级分类位置待定的新属新种。该三叶虫特点突出,是头部特征极度消隐且不具眼、眼叶、眼脊的“盲三叶虫”。该三叶虫为小尾型后颊类,主要特征为:壳面光滑,背壳呈次椭圆形,头盖半圆形;头鞍呈钟形向前收缩;背沟浅,仅在侧光下可见;活动颊平滑宽大,具有宽阔的活动颊刺;胸部由14节组成;尾部中轴粗壮,无边缘沟。  相似文献   

6.
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   

7.
四川西北石渠与西藏东部、青海南部相毗连,这一带大面积出露上三叠统变质碎屑岩,含双壳类Halobia cf.yunnanensis Reed,H.cf.pluriradiata Reed,H.ganziensis Chen,H.convexa Chen,H.cf.austriaca Mojsisovics等。1982年,四川区调队李庆祥等在川藏交界的金沙江东岸石渠县洛须区,该变质碎屑岩中发现一角砾岩化生物碎屑微晶灰岩体,长20余米,宽约10米,含三叶虫和牙形石。三叶虫有Mucronaspis cf.mucronata(Brongniart),Dicranopeltis cf.polytoma(Angelin),Pseudosphaerexochus(s.1.)ovalis sp nov.,Microparia(Microparia)chuanxiensis sp.nov.,Holotrachelus shiquensis sp.nov.,? Nileus luoxiensis sp.nov.,Remopleurides aff.emarginatus Toernquist,Remopleurides conicus sp.nov.,Remo-  相似文献   

8.
描述陕南南郑梁山中奥陶世Llanvin早期7种三叶虫,包括两个新种Bathycheilus sinensis sp.nov.和Pseudocalymene sculpta sp.nov.,其中Bathycheilus一属在我国系首次发现。三叶虫组成和埋葬相特征表明这一动物群的底栖分子应生活于水体安静,深度大于风暴浪基面的灰泥质海底环境。这些底栖三叶虫属于环冈瓦纳动物群的一个组成部分,但显示了与北欧动物群的一定联系。  相似文献   

9.
新疆巴里坤三塘湖志留纪三叶虫   总被引:1,自引:0,他引:1  
新疆巴里坤三塘湖晚志留世阿苏山组三叶虫包括Ananaspis fecunda Barrande,Cheirurus barkolensis sp.nov.和Pacificurus sp.,与准噶尔盆地西北部乌图布拉格,哈萨克斯坦及捷克波西米亚的晚志留世三叶虫关系密切。另外对中国5个地区晚志留世三叶虫地层作了对比。Ananaspis,Pacificurus二属在中国是初次发现。  相似文献   

10.
本文三新种是壳菜果伪足瘿螨Nothopoda mytibariae sp. nov., 木香新联节瘿螨Neocosella aquilariae sp. nov. 和荔枝离节瘿螨Disella litchii sp. nov., 它们都分布在广西。  相似文献   

11.
湘西中寒武世多节类三叶虫新属种   总被引:1,自引:0,他引:1  
描记湘西江南斜坡带中寒武统花桥组的多节类三叶虫4新属7新种:Changqingialaevissp.nov,Fissanomocarellapaibiensisgen.etsp.Nov.,Huayuaniasubcalvagen.etsp.nov,Luaspisdecorosagen.etsp.Nov.。Paranomocarellafortissp.Nov.,Wangcuniawangcunensisgen.etsp.nov和Zhujiahunanensissp.Nov.。Fissanomocarellagen.nov.属Anomocarellindae科;Wangcuniasen.nov.和Huayuaniasen.nov.分别存疑地归入Papyraspidae科和Anomocarellidae科;Luaspisgen.nov.的科级分类位置未定。所有新属种与华北和东北南部中寒武世动物群关系较密切,是斜坡相混生动物群的重要分子。  相似文献   

12.
河南叶县下寒武统辛集组单板类和腹足类化石的研究   总被引:5,自引:3,他引:5  
本文描述和讨论了河南叶县杨寺庄下寒武统辛集组单板类13种,腹足类2种,未定类1种。其中包括2新属6新种:Repenoconus xinjiensis gen.nov.,Scenella pycna sp.nov.,Securiconus vulgaris sp.nov.,Obtusocnus grossicostus sp.nov.,Igorellina proboscis sp.nov.,Gal  相似文献   

13.
贵州早、中寒武世斗篷海绵科(Choiidae)的发现   总被引:4,自引:3,他引:4  
本文描述了贵州遵义下寒武统牛蹄塘组生物群和台江中寒武世凯里生物群中保存完整的斗篷海绵科(Choiidae)中斗篷海绵(Choia)和小斗篷海绵(Choiaella)化石标本,共计2属2种2未定种:Choia zunyiensis sp.nov.,Choia sp.,Choiaella avata sp.nov.和Choiaella sp.。Choia分布很广.在我国下寒武统澄江生物群及北美中寒武统的四大生物群中均有产出。Choiaella原仅产于我国澄江生物群,凯里生物群中Choiaella的发现使其时代上延至中寒武世。贵州早、中寒武世斗篷海绵科的发现及研究为海绵动物的早期演化及古地理学等方面的研究提供了重要的新材料。  相似文献   

14.
Duyunaspis Zhang and Qian in Zhou et al.,1977是黔东、湘西北杷榔组掘头虫类三叶虫的重要分子。本文描述剑河八郎"清虚洞组"的Duyunaspis,这些新材料的头鞍中部膨大且向前略有收缩,前颊类型面线,成虫具10个胸节;而杷榔组的Duyunaspis duyunensis Zhang and Qian in Zhou et al.,1977头鞍桶状,背沟较平直,后颊类型面线,成虫10个胸节,二者明显不同。本文将"清虚洞组"的Duyunaspis定为一个新种:剑河都匀盾壳虫Duyunaspis jianheensis sp.nov.。研究显示,D.jianheensis与杷榔组的D.duyunensis具有形态相似性,后者可能为其祖先种。  相似文献   

15.
Abstract: Palaeoscolecidan worms are rare, Early Palaeozoic fossils with uncertain affinities within the Ecdysozoa. They are locally abundant in the Cambrian and scattered in the Early Ordovician, but very sparse thereafter. Forty‐four specimens have been collected from the Middle Ordovician of the Builth‐Llandrindod Inlier of Mid Wales and include well‐preserved material assigned to seven new genera, with four additional species in open nomenclature. An additional specimen from the Arenig Pontyfenni Formation of South Wales is also described in open nomenclature. The total demonstrates much greater palaeoscolecid diversity than hitherto suspected for this time. The specimens are preserved as cuticle fragments in shales and siltstones, often of submillimetre size but in many cases with excellent preservation. The level of detail preserved in some is equal to that found in Cambrian phosphatized faunas. The new approach to collecting, and the recognition that this material can yield taxonomically useful information, opens new avenues for palaeoscolecidan research in siliciclastic environments. The new taxa are the following: Radnorscolex bwlchi gen. et sp. nov., Aggerscolex murchisoni gen. et sp. nov., Bullascolex inserere gen. et sp. nov., Wernia eximia gen. et sp. nov., Ulexiscolex ormrodi gen. et sp. nov., Pluoscolex linearis gen. et sp. nov. and Loriciscolex cuspidus gen. et sp. nov. The high diversity, and the taxonomic separation from known groups described primarily from Cambrian carbonates, implies that palaeoscolecidans either diversified significantly during the Ordovician or were taxonomically segregated between carbonate and siliciclastic settings. Palaeobiological findings also include confirmation that some palaeoscolecid basal cuticles were solid and others reticulate, plates (and platelets) could form by lateral accretion, plates were in part primarily phosphatic and in part organic and that in at least some groups, platelet secretion occurred external to plate secretion.  相似文献   

16.
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   

17.
More than 4200 kg of limestone, representing 980 productive samples, from the upper Middle Cambrian, Upper Cambrian, and lowermost Ordovician in western and north-western Hunan were processed for paraconodonts, protoconodonts, and euconodonts. The focus of the present paper is on the upper Middle and lower Upper Cambrian interval as it is developed at two, apparently stratigraphically continuous, key sections. The collections studied, which include more than 20,000 specimens and are quite diverse taxonomically, prove that some protoconodonts and paraconodonts are useful biostratigraphically. Previously proposed protoconodont-paraconodont biozones in Hunan are revised and correlated with recently revised trilobite biozones, as well as with protoconodont-paraconodont and trilobite biozones in North China. Twenty-six species and seven conditionally identified species belonging to 13 genera are described. Among these, two genera ( Huayuanodontus and Yongshunella ) and two species ( Westergaardodina elegans and Yongshunella polymorpha ) are new. This study has special interest for Cambrian biostratigraphy because the two studied sections are global stratotype candidates for the Middle-Upper Cambrian series boundary. The level of the Upper-Middle Cambrian Series boundary, as currently recognized in China (at the base of the Linguagnostus reconditus Trilobite Biozone) is well marked in the paraconodont succession and can be traced into the Swedish standard succession using these fossils. By contrast, another level recently proposed as a potential global Middle-Upper Cambrian Series boundary level, the base of the Glyptagnostus reticulatus Trilobite Biozone, does not coincide with any marked change in the Hunan conodont species succession useful for local and regional correlation.  相似文献   

18.
Abstract:  A medium diversity silicified Middle Cambrian faunal assemblage occurs in an olistolith of bioclastic limestone within Silurian siliciclastic turbidites on the slopes of Arpatektyr Mountain in the eastern Alai Range, Kyrgyzstan. The fauna includes the trilobites Raragnostus cf. mirus , Altikolia kurshabica sp. nov., Corynexochina weberi , Dorypyge richthofeniformis , aff. Jincella sp., Olenoides comptus , Skreiaspis aff. spinosus and Suluktella mambetovi sp. nov. Three of these taxa ( C .  weberi , O .  comptus and R . cf.  mirus ) are considered locally to be characteristic of the Pseudanomocarina Beds, although Pseudanomocarina itself is not present. Altikolia and Suluktella are endemic to early Palaeozoic terranes of Central Asia, Corynexochina also occurs in South China and Skreiaspis is known elsewhere exclusively from the Middle Cambrian of 'West' Gondwana. Because of preservation in full relief, the silicified trilobite fauna allows a detailed understanding of some morphological structures, related especially to trilobite enrolment, otherwise inadequately known for many Mid-Cambrian polymerid trilobites.  相似文献   

19.
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   

20.
A temporary exposure of Middle Llandovery (Aeronian) shales in the Swedish town of Motala has yielded a rich collection of shelly fauna and graptolites. The shelly fauna is restricted to a thin mudstone band in a graptolitic shale sequence, and is within theconvolutus Biozone. This mudstone band may be correlated with a similar mudstone in the Kolka core from northwestern Latvia. The faunas, including the trilobites, from the two occurrences represent the same species. In the collection from Motala, nine species of trilobites are present, of whichAcernaspis dispersa sp. nov. is new. The material represents the first trilobite fauna described from the Middle Llandovery of Sweden.  相似文献   

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