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1.
关山动物群是一个以三叶虫为主伴生有三叶形虫、吐卓虫、古虫、古蠕虫、腕足类及海绵动物的多门类软躯体后生动物化石群 ,时代介于澄江动物群与凯里动物群 (或伯吉斯页岩动物群 )之间 ,因此它的发现和研究对进一步阐明寒武纪早期生命大爆发和生物的早期演化都具有非常重要的意义。关山动物群中的古虫动物的发现有着更大的意义 ,它不仅增加了古虫动物的属种内容 ,而且对古虫动物的演化具有一定的作用。本文详细描述了昆明地区早寒武世沧浪铺阶乌龙箐组发现的古虫动物新种 Vetulicola gangtoucunensis L uo,Fu etHu sp. nov.,进一步修订了古…  相似文献   

2.
湖南西部和贵州东部奥陶系临湘组,地层厚度甚小,但含有较丰富的三叶虫化石,经作者研究共计11个属15个种和2个未定种,其中包括1个新属Dayongia(gen.nov.)和7个新种:Madygenia exsculpta sp.nov.,Madygenia tuberculata sp.nov.,Davongia brevica gen.＆ sp.nov.,Dayongia longicephala gen.＆ sp.nov,Eobronteus hunanensis sp.nov.,Shuma-rdia songtaoensis sp.nov.,Encrinurells exsculpta sp.nov.。这个动物群除具有我国地方性色彩外,同时具有与欧洲动物群明显的近似性。其时代应属晚奥陶世,相当于欧洲Ashgill期。  相似文献   

3.
贵州关岭动物群中的海百合   总被引：17，自引：3，他引：14  
关岭动物群是由海百合、水生爬行动物、鱼、双壳类、菊石、牙形石等多门类生物组成的动物群,保存在上三叠统瓦窑组近底部.本文仅描述了其中的海百合1属2种:Traumatocrinus kueichouensis Mu, Traumatocrinus guanlingensis sp. nov.,其中Traumatocrinus guanlingensis 为1新种.  相似文献   

4.
1986年辽宁省地矿局区调队在大连市棋盘磨和杨家屯震旦系兴民村组发现水母类化石。本人进行了较详细的研究,根据其结构和生态特征,确定为腔肠动物门水螅虫纲水母化石,并命名为大连水母动物群。文中对其中的2个新属,7个新种进行了描述,它们为:Cyclomedusa qipanmoensis sp.nov.,Cyclomedusa stellatus sp.nov.,Medusinites monoseamoformis sp.nov.,Medusinites planodiscifo-rmis sp.nov.,Ellipsomedusa liaonanensis gen.et sp.nov.,Ellipsome-dusa dalianensis gen.sp.nov.,Quadratimedusa liaoningensis gen.etsp.nov.这一发现和研究无疑确定了大连地区震旦系的存在。  相似文献   

5.
内蒙古白云鄂博群尖山组微古植物新发现   总被引：14，自引：4，他引：14  
孙淑芬 《地质论评》1992,38(5):474-480
本文研究的微古植物,均发现于内蒙古白云鄂博群尖山组,共计10属33种,其中有3新种:Archaeodiscina baiyunensis sp.nov.,Lophosphaeridium favosumsp.nov.,Lophosphaeridium symbioense sp.nov.其组合特征以刺球藻群(Acanth-omorphida)的分子为主,球藻群(Sphaeromorphida)分子次之。在刺球藻群中以Baltisphaeridium属和Micrhystridium属的分子占绝对优势。微古植物个体一般为10—30μm。上述微古植物在我国云南昆明下寒武统以及欧洲、北美一些地区均有报道,充分显示出早寒武世特点。内蒙古白云鄂博群的时代,半个多世纪以来一直被认为属元古宙,本文的资料为重新判定白云鄂博群尖山组的时代,提供了新的古生物学依据。  相似文献   

6.
澄江生物群分子在贵州遵义牛蹄塘组发现   总被引：8，自引：1，他引：7  
澄江生物群是认识寒武纪生命大爆发的重要窗口,它的分布范围一直仅限于滇东地区,员近在贵州遵义松林牛蹄塘组底部页岩中发现有Naronia,Archotuba Conoidalis,Isaxys,Perpicaris,Lingulepis,Tsunyidiscus,Scenella,水母状化石(medusiform fossil),海绵动物化石Leptomitus,类似半索动物秆壁虫Rhabdopleura化石,软舌螺类Hyolithids,宏观藻类和疑源类化石Zunyiphyton perelegans Yang et Zhao,1999,Yuknessia sp.,Longenema Ding,1996,Sphaerocongregus variabilis等。其中有一部分是属于澄江生物群分子,这是云南省外澄江生物群分子的新发现。由于生物群之下40m处还产大量海绵动物、高肌虫和藻类化石等组成的松林生物群,其上又有下寒武统明心寺组古杯动物群,因此,这一生物群的发现对研究早寒武世生物的演化也具有一定的科学意义,同时,对澄江生物群的古生态学研究也具有重要意义。  相似文献   

7.
湘西震旦系留茶坡组炭质宏化石初步研究   总被引：8，自引：0，他引：8  
初步研究表明,留茶坡组中部黑色页岩中化石呈炭质压膜状保存,主要包括长绳状或带状宏观藻：Chenlidenella spiralis gen.et sp.nov.,Longifuniculum dissutum Steiner,Erdtmann and Chen,1992,Longitaenina triphyllus gen.et sp.nov.,L.rhodina gen,et sp.nov.,L.lanceolatus gen.et sp.nov.;直立不分枝的管状 宏观藻Longfengshania elongata Duan et Du,1985,L.elliptic-ulum sp.nov,Paralongfengshania oblong sp.nov.Miaohenella hunanensis(Steiner,Erdtmann and Chen,1992),M.rhomba Ding,1996,M.taenina sp.nov.,Cystoculum catenuatus gen.et sp.nov.;末端存在二歧式分的丝状宏观藻：Sectoralga bibarb atus sp.nov.,S,typica Hu,1996,S.capillaceus sp.nov.,S.umbellulata Hu,1996和水母状化石Taoyuania ovatoides gen.et sp.nov.,Liaonanella giganta sp.nov.,Wulingshania canopse gen.et sp.nov.及蠕虫状化石Wenshanwania simplex gen.et sp.nov.等。从地层对比上看,上述化石可能与伊迪卡拉动物群为同一时期的产物。晚震旦世晚期留茶坡组中类水母化石的出现是我国晚震旦世生物演化史上一次重要事件,以类水母等软躯体动物和高分异度的宏观藻类共同繁盛为特色的生物群与国内外同期地层中的已知生物群面貌不同,显示出一种新的伊迪卡拉庭园,为此,本文将棋其合名为武陵山生物群。  相似文献   

8.
云南西部施甸地区中泥盆世四射珊瑚   总被引：2，自引：0，他引：2  
王增吉 《地质论评》1986,32(6):596-600
本文描述的四射珊瑚采自云南省西部施甸地区中泥盆世马鹿塘组及何元寨组。描述了马鹿塘组珊瑚5属5种,2个未定种,并建立1个珊瑚组合:Metrionaxon yunnanense-Neaxon inopinata组合,包括Metrionaxon yunnanense sp.nov.,M.sinense sp.nov.,Neason inopinata(Prantl),Neaxon sp.,Metriophyllum gracile Schluter,Barrandeophyllum?sp.,Amplexocarinia yunnanensisn sp.nov.等。该组合的时代为中泥盆世早期(Eife lian)。描述了何元寨组1属,1个亚种:Peripaedium planum planumBirenheide.本组时代为中泥盆世晚期。这一珊瑚动物群与我国华南区珊瑚动物群截然不同,而与欧洲珊瑚动物群非常相似。  相似文献   

9.
陕西镇巴梁家桥奥陶系西梁寺组与涧草沟组的微古植物群   总被引：1，自引：0，他引：1  
陕西镇巴梁家桥奥陶系含有比较丰富的微古植物。在下—中奥陶统西梁寺组下部的深灰色白云质砂岩中,发现微古植物17个属,46个种;在上奥陶统涧草沟组黄绿色页岩中,发现微古植物15个属,28个种。为该地区奥陶系地层的划分提供了又一个方面的生物依据,同时也为我国目前研究程度还比较低的早古生代微古植物增添了新资料。本文中描述了三个新种:Micrhystridium ciliforme sp. nov., Buedingiisphaeridium humifusum sp. nov. Multiplicisphaeridium robustum sp. nov.  相似文献   

10.
陕西镇巴梁家桥奥陶系西梁寺组与涧草沟组的微古植物群   总被引：3，自引：0，他引：3  
陕西镇巴梁家桥奥陶系含有比较丰富的微古植物。在下一中奥陶统西梁寺组下部的深灰色白云质砂岩中,发现微古植物17个属,46个种;在上奥陶统涧草沟组黄绿色页岩中,发现微古植物15个属,28个种。为该地区奥陶系地层的划分提供了又一个方面的生物依据,同时也为我国目前研究程度还比较低的早古生代微古植物增添了新资料。本文中描述了三个新种:Micrhystridium ciliforme sp.nov.,Buedingiisphaeridiumhumifusum sp.nov.Multiplicisphaeridium robustum sp.nov.  相似文献   

11.
New Vetulicoliids from the Lower Cambrian Guanshan Fauna, Kunming   总被引：13，自引：3，他引：10  
  相似文献   

12.
New Record of Palaeoscolecids from the Early Cambrian of Yunnan, China   总被引：1，自引：0，他引：1  
A new palaeoscolecid, Guanduscolex minor Hu, Luo et Fu gen. et sp. nov., with preserved soft parts of introvert and intestines comes from the Lower Cambrian Guanshan fauna of Yunnan, South China. Microstructural details of the cuticle revealed by scanning electron microscopy （SEM） show that each annulation bears three rows of plates and each plate bears 9-10 marginal and 4-5 central nodes. This discovery sheds new light on the relationships and evolutionary pathway of the palaeoscolecids and other early priapulids.  相似文献   

13.
The Guanshan Fauna is a soft-bodied fauna dominated by arthropods （including trilobites, trilobitoides, Tuzoia, Isoxys, and bradorids） in association with priapulids, brachiopods, anomalocaridids, vetulicoliids, sponges, chancellorids, and echinoderms. This paper reports and describes a new arthropod from the yellowish green mudstone at the lower part of the Wulongqing Formation, Canglangpuan Stage, Lower Cambrian in Kunming, Yunnan, China. The stratigraphic and geographic distribution, classification, fossil preservation, life style of this new arthropod and comparisons with other fossil arthropods are also discussed in details. The discovery and research of the non-mineralized arthropod, Guangweicaris Luo, Fu et Hu gen. nov. from the Guanshan Fauna adds new members to the taxonomic list and provides new information to the evolution of early arthropods. Furthermore, this study would shed new light into the ＂Cambrian Explosion＂ and the evolution of early life.  相似文献   

14.
贵州台江中寒武世凯里组中分枝状宏观藻类化石   总被引：6，自引：1，他引：6  
本文描述了贵州中寒武世凯里组中的分枝状宏观藻类化石5属7种，即：Marpolia spissa Walcott,Marpolia aequalis Walcott,Guizhouella ramulosa Yang(gen.et sp.nov.),Doushantuophyton lineare Chen,Thamnophton formosus Yang(gen.et sp.nov.),Eoulothrix fibrillata Ding,Eoulothrix flabellophyton Yang(sp.mov.)。根据大量的藻类与凯里生物群共生特征，从藻类的生态及生物群分布受到沉积韵律控制等特征分析，认为凯里生物群生活环境的水深应该在30－60m，而埋藏和保存环境的水深是150m左右。另外，将凯里生物群中的宏观藻类化石与震旦纪陡山沱期的藻类化石进行了比较，两者在以分枝状藻类占主要组成上是相似的，从这一方面来说，晚震旦世宏观藻类与寒武纪宏观藻类没有大的演变，但寒武纪宏观藻类以出现钙质珊瑚藻类、分枝更加复杂的类型和具有锯齿状叶状体、生殖托构造的藻类为特征。  相似文献   

15.
贵州台江早—中寒武世凯里组的宏观藻类化石   总被引：7，自引：0，他引：7  
杨瑞东  赵元龙 《地质论评》1999,45(3):282-290
本文描述了贵州寒武纪凯里组中的宏观藻类化石７属１２种,其中有６个新属１０个新种;Ｂｏｓｗｏｒｔｈｉａ ｓｉｍｕｌａｎｓ,Ｂ．ｇｙｇｅｓ,Ｅｏｌａｍｉｎａｒｉａ ｇｒａｎｄｉｓ ｇｅｎ。ｅｔ ｓｐ．ｎｏｖ。,Ｅ．ｐｅｒｅｌｅｇａｎｓ ｇｅｎ。ｅｔ ｓｐ。ｎｏｖ．,Ｆ．ｖｅｉｎ ｇｅｎ．ｅｔ ｓｐ．ｎｏｖ．,Ｋａｉｌｉｐｈｙｔｏｎ ｓｉｍｕｌａｎｓ ｇｅｎ．ｅｔ ｓｐ．ｎｏｖ．,Ｐａｌａｅｏｓｐｉｎｅ  相似文献   

16.
The Guanshan Biota from the Cambrian Stage 4 Wulongqing Formation is a typical Burgess-shale type Lagerst?tte that had witnessed the Cambrian explosion. Here we report two new localities of the Guanshan Biota, which is located at Baimei village, south of Kunming and Xinglong village, Wuding County, Yunnan Province respectively. Both localities produce soft-body fossils and several new taxa, e.g. a new species of palaeoscolecidans (Palaeoscolex xinglongensis sp. nov.) reported herein. The comparative study of the new species with similar form not only indicates that there is a diversification of palaeoscolecid species in Guanshan Biota, but also strengthens the ties between the older Chengjiang Biota and the younger Kaili Biota (and also the coeval Burgess Shale community). Three paleoecological features, including high diversity, little disparity and richness of palaeoscolecid worms, are summarized as a case study to represent the differences between Guanshan and Chengjiang Biota.  相似文献   

17.
This paper gives a brief report on the new occurrence of the Early CambrianQiongzhusi' an Chengjiang fauna in the Haikou area, Kunming and its assemblage feature andthe stratigraphic section of the horizon yielding these fossils. Eight genera and 8 species ofTrilobitoidea are described here, embracing Leanchoilia asiatica Luo et Hu (sp. nov.), Yohoiasinensis Luo et Hu (sp. nov.), Zhongxinia speciosa Luo et Hu (gen. et sp. nov.), Xandarellaspectuculum Hou et al., Dianchia mirabilis Luo et Hu (gen. et sp. nov.), Kuamaia lata Hou,Retifacies longispinus Luo et Hu (sp. nov.) and Sinoburius lunaris Hou et al.  相似文献   

18.
Yanjiahella gen. nov., a distinctive fossil taxon from the Early Cambrian Yanjiahe Biota in Yichang, Hubei Province, is characterized by: 1) an overall body plan composed of a stalk and a calyx (also arms in some species); 2) a stalk with closely spaced, transverse wrinkles and a medial, longitudinal ridge; and 3) a calyx preserved with three-dimensional radiating striations, as well as a probable madreporite in some specimens. Three species that can be assigned to this genus, which are Y. ancarpa sp. nov., Y. monocarpa sp. nov., and Y. biscarpa sp. nov. Yanjiahella is comparable to certain echinoderm taxa in terms of morphology and some biological structures, which might indicate the early evolution and diversification of ancestral echinoderm lineages from the early Early Cambrian Yangtze Platform. The discovery of putative echinoderms in the Yanjiahe Biota provides significant clues about the origination and evolution of the deuterostome phylum Echinodermata.  相似文献   

19.
A diverse fauna of wasps of the extinct parasitoid family Stigmaphronidae (Ceraphronoidea) are recorded in Early Cretaceous (Lower Albian) amber from Spain. Seven new species in five genera are described and figured based on 51 specimens, representing more material than in all the world’s other amber deposits combined. New species include: Elasmophron mari sp. nov., Libanophron sugaar sp. nov., Hippocoon basajauni sp. nov., Burmaphron jentilak sp. nov., B. sorginak sp. nov., B. iratxoak sp. nov., and Tagsmiphron olentzero sp. nov. The significance of the fauna is discussed and compared with that of other Cretaceous amber deposits, in particular the tremendous richness of the Spanish fauna is contrasted with the complete absence of stigmaphronids in the slightly younger and nearby French amber. Whether this stark difference represents particularly favorable conditions for these parasitoids, or their hosts, in the Cretaceous Spanish archipelago, or whether it is owing to taphonomic factors is discussed.  相似文献   

20.
《Gondwana Research》2014,25(1):420-437
A new assemblage of early Cambrian bivalved arthropods (Bradoriida) is described from the Arrowie Syncline in the northern Flinders Ranges, South Australia. The well preserved, largely endemic fauna comprises a total of six taxa (including five new species): Jiucunella phaseloa sp. nov., Jixinlingella daimonikoa sp. nov., Mongolitubulus anthelios sp. nov., Neokunmingella moroensis sp. nov., Phasoia cf. spicata (Öpik, 1968), and Sinskolutella cuspidata sp. nov. This assemblage is derived from a carbonate sedimentary package representing a high energy, shallow water archaeocyath-Renalcis biohermal facies of Terreneuvian, Stage 2 age which transitions up-section to a more restricted, low energy, intra-shelf lagoonal environment that correlates with a Cambrian Series 2, Stage 3 age. The new taxon J. phaseloa sp. nov., has a first appearance datum (FAD) in shallow water biohermal facies of the Hideaway Well Member of the Wilkawillina Limestone at a level 47 m below the FAD of Pelagiella subangulata which is taken to approximate the base of Series 2, Stage 3 in South Australia. Along with Liangshanella circumbolina, this makes J. phaseloa sp. nov. amongst the oldest bivalved arthropods in South Australia and potentially greater Gondwana. The presence of 25 bradoriid taxa from the early Cambrian of South Australia suggests East Gondwana represents a major centre of origin for the Bradoriida.  相似文献   

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