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云南元谋古猿地点的小哺乳动物化石 总被引:1,自引:1,他引:0
本文依据元谋盆地西北河村一带古猿化石地点所产6种小哺乳动物(Anourosorex sp., Leporidae gen. et sp. indet., Sciurotamias sp., Monosaulax sp., Brachyrhizomys blacki, Rhizomyidae gen. et sp. indet.),初步论证了几个含古猿化石地点(8603、8701、8704、8801 相似文献
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英文贵州中寒武世凯里生物群中宏观藻类化石新材料(英文) 总被引:3,自引:0,他引:3
贵州省台江县中寒武世凯里生物群含有丰富的非钙质藻类和具有软躯体后生动物化石 ,它为布尔吉斯页岩型生物群在世界广泛分布提供了更有力的证据。在生物群的宏观藻类中描述了 5个属 5个种 ,包括 2个新属。它们是MarpoliaspissaWalcott、AcinocricusstichusConwayMorrisandRobison、UdotealgaerectaYang、EosargassumsawataYang和RhizophytonzhaoyuanlongiiYang ,并且将凯里生物群中的宏观藻类化石组合与加拿大布尔吉斯页岩生物群中的宏观藻类进行了对比 ,发现两个生物群不仅具有相似的动物化石组成 ,而且宏观藻类化石组成也很相似。 相似文献
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湖北鹤峰白果坪水井沱组(早寒武世)燧石中微化石新资料 总被引:2,自引:0,他引:2
湖北省鹤峰白果坪剖面下寒武统水井沱组底部黑色燧石的岩石薄片中,发现有丰富的保存完好的微化石,包括球形藻、刺球藻、丝状藻类及一些分类不明的微化石。经初步研究计有6属9种类型。其中包括1新属Spiciformagen.nov.和2个新种Spiciformaagglomeratagen,etsp.nov.和?Retinaritesspiralissp.nov.。这一发现进一步丰富了早寒武世早期硅质岩相地层的微体化石资料,为相关地层的对比提供了可资参考的古生物学依据。 相似文献
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山东宁阳早更新世哺乳动物化石(英文) 总被引:2,自引:2,他引:0
1999年,作者收到王元青博士转来胡长康老师未研究的一批哺乳动物化石。这些化石由山东省博物馆工作人员采自山东宁阳县伏山的裂隙堆积物中。根据化石围岩判断这批化石可归入同一动物群。该动物群包含12种:松鼠科1种(Sciurotamias sp.),兔科2种(Brevilagus brachypus,Lepus sp.),食肉目5种(Pachycrocuta perrieri,Nyctereutes sinensis,Canis variabilis, Homotherium sp.和Meles sp.),牛科2种(Gazella sp., Ovibovinae gen etsp.indet.),鹿科2种(Cervus sp.,Cervidae gen et sp.indet.)。其中,Pachycrocuta perrieri个体明显小于桑氏鬣狗(Pachycrocuta licenti),p2后附尖较发育,p4前附尖高,ml三角座窄。四川巫山原鉴定为桑氏鬣狗的标本中至少有一件下颌骨(重庆自然博物馆,CV877)应当归入此种。Meles sp.具有较周口店第18点发现的Meles chiai及中更新世常见的Meles mel? 相似文献
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贵州台江凯里动物群中的水母状化石 总被引:5,自引:0,他引:5
贵州台江中寒武世凯里动物群中的水母状化石Rotadiscusguizhouensissp.nov.,是云南早寒武世澄江动物群中修正涵义后的Ratodiscus属的一个新种。与模式种B.gandis相比,新种个体较小,辐管数减少,内环网格状构造更为明显。新种与早寒武世澄江动物群和中寒武世布尔吉斯页岩中的Eldonia相似,两者之间均具有相近的消化腔、触手和外形,但Eldonia辐管系统更加复杂。根据“U”形消化腔和环绕口端的触手,新种应归入触手动物类。 相似文献
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贵州台江中寒武世凯里动物群 总被引:21,自引:0,他引:21
贵州中寒武世凯里动物群由10个以上门类化石组成,包括棘皮动物、水母状化石、蠕虫、海绵、软舌螺、三叶虫、腕足类、单板类、菌藻类、疑源类、一些分类不明的化石及遗迹化石。这一动物群形成于浅海陆棚环境,它是继我国已发现的、世界闻名的澄江动物群之后,在我国寒武系发现的另一个布尔吉斯页岩型动物群。 相似文献
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贵州省台江县中寒武世凯里生物群含有丰富的非钙质藻类和具有软躯体后生动物化石,它为布尔吉斯页岩型生物群在世界广泛分布提供了更有力的证据。在生物群的宏观藻类中描述了5个属5个种。包括2个新属,它们是Marpolia spissa Walcott、Acinocricus stichus Conway Morris and Robison、Udotealga erecta Yang、Eosargassum sawata Yang和Rhizophyton zhaoyuanlongii Yang,并且将凯里生物群中的宏观藻类进行了对比,发现两个生物群不仅具有相似的动物化石组成,而且宏观藻类化石组成也很相似。 相似文献
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昆明附近早寒武世遗迹化石 总被引:3,自引:0,他引:3
报道了昆明地区下寒武统筇竹寺组玉案山段和沧浪铺组乌龙箐段所发现的遗迹化石共13属15种,其中1新属6新种为:QipanshanichnusgyrusLuoetTaoichnogen.etichnosp.nov.,ArthrophycusqiongzhusiensisLuoichnosp.nov.,BifungiteskunyangensisLuoichnosp.nov.,CruzianabeifengwanensisLuoetGaoichnosp.nov.,PalaeophycusbeifengwanensisLuoichnosp.nov.,ArchaeichniumkunmingensisLuoichnosp.nov.。这些遗迹化石均产于开阔台地相潮下带的低能环境,为浅海相的Gruziana遗迹相。 相似文献
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贵州台江早-中寒武世凯里组保存大量的生物化石,它构成了寒武纪重要的生物群之一——凯里生物群。在凯里生物群中保存有丰富的碳质薄膜藻类化石,新发现类似苔藓植物化石(Parafunaria sinensis Yang(gen.et sp.nov)),它具有藓类植物所拥有的典型的叶状体轮生现象、孢朔、孢朔柄和复杂的根系特征。推测它是藓类植物祖先,它为进一步研究藓类植物和陆生高等植物的起源和演化提供了新的线索。 相似文献
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贵州早、中寒武世斗篷海绵科(Choiidae)的发现 总被引:7,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
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Bryophyte-like Fossil (Parafunaria sinensis) from Early-Middle Cambrian Kaili Formation in Guizhou Province, China 总被引:1,自引:0,他引:1
Abundant well-preserved animal and macroalgal fossils were discovered in the Early-MiddleCambrian Kaili Formation of Taijiang County, Guizhou Province, China, which constitute the Kaili Biota,named as one of the three important Burgess Shale-type faunas. The bryophyte-like fossil (Parafunariasinensis Yang gen. et sp. nov) was discovered in the horizon of occurrence of Macroalgal fossils. The fossilof P. sinensis possesses typical characters of bryophyte, such as whorled leaves, capsule and seta, andcomplex rhizoid or foot. We infer that the bryophyte-like fossil could be the ancestor of bryophyte. Thediscovery provides a new lead for further study on the origin and evolution of bryophyte or land plant. 相似文献
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贵州台江寒武纪的一些单板类化石 总被引:2,自引:0,他引:2
我国有关早寒武世中期以后的单板类报道和研究较少。本文描述和讨论产于贵州省台江县八郎村下寒武统顶部和中寒武统下部的一些单板类化石,计有Helcionella terraustralis,Coreospiracf.rugosa,Latouchella taijiangensis sp.nov.,Latouchella sp.,Monoplacophora gen.et sp.indet.等。这些单板类化石的发现不仅丰富了“凯里动物群”的内容,为该区中、下寒武统的划分提供了单板类的证据,而且对研究单板类的演化和地理分布规律增加了重要材料。 相似文献
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Minter NJ Mángano MG Caron JB 《Proceedings. Biological sciences / The Royal Society》2012,279(1733):1613-1620
The first arthropod trackways are described from the Middle Cambrian Burgess Shale Formation of Canada. Trace fossils, including trackways, provide a rich source of biological and ecological information, including direct evidence of behaviour not commonly available from body fossils alone. The discovery of large arthropod trackways is unique for Burgess Shale-type deposits. Trackway dimensions and the requisite number of limbs are matched with the body plan of a tegopeltid arthropod. Tegopelte, one of the rarest Burgess Shale animals, is over twice the size of all other benthic arthropods known from this locality, and only its sister taxon, Saperion, from the Lower Cambrian Chengjiang biota of China, approaches a similar size. Biomechanical trackway analysis demonstrates that tegopeltids were capable of rapidly skimming across the seafloor and, in conjunction with the identification of gut diverticulae in Tegopelte, supports previous hypotheses on the locomotory capabilities and carnivorous mode of life of such arthropods. The trackways occur in the oldest part (Kicking Horse Shale Member) of the Burgess Shale Formation, which is also known for its scarce assemblage of soft-bodied organisms, and indicate at least intermittent oxygenated bottom waters and low sedimentation rates. 相似文献
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Ben J. Slater Thomas H. P. Harvey Romain Guilbaud Nicholas J. Butterfield 《Palaeontology》2017,60(1):117-140
Exceptionally preserved ‘Burgess Shale‐type’ fossil assemblages from the Cambrian of Laurentia, South China and Australia record a diverse array of non‐biomineralizing organisms. During this time, the palaeocontinent Baltica was geographically isolated from these regions, and is conspicuously lacking in terms of comparable accessible early Cambrian Lagerstätten. Here we report a diverse assemblage of small carbonaceous fossils (SCFs) from the early Cambrian (Stage 4) File Haidar Formation of southeast Sweden and surrounding areas of the Baltoscandian Basin, including exceptionally preserved remains of Burgess Shale‐type metazoans and other organisms. Recovered SCFs include taxonomically resolvable ecdysozoan elements (priapulid and palaeoscolecid worms), lophotrochozoan elements (annelid chaetae and wiwaxiid sclerites), as well as ‘protoconodonts’, denticulate feeding structures, and a background of filamentous and spheroidal microbes. The annelids, wiwaxiids and priapulids are the first recorded from the Cambrian of Baltica. The File Haidar SCF assemblage is broadly comparable to those recovered from Cambrian basins in Laurentia and South China, though differences at lower taxonomic levels point to possible environmental or palaeogeographical controls on taxon ranges. These data reveal a fundamentally expanded picture of early Cambrian diversity on Baltica, and provide key insights into high‐latitude Cambrian faunas and patterns of SCF preservation. We establish three new taxa based on large populations of distinctive SCFs: Baltiscalida njorda gen. et sp. nov. (a priapulid), Baltichaeta jormunganda gen. et sp. nov. (an annelid) and Baltinema rana gen. et sp. nov. (a filamentous problematicum). 相似文献
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The Lower Cambrian Chengjiang fauna is reviewed and shown to be closely comparable with the younger Burgess Shale fauna. but with various differences in detail. A diverse group of more or less annulated lobopod animals including 'armoured lobopods' are regarded as representatives of the phylum Onychophora. 'Trilobitomorphs' include several new types. Probable protaspides of the trilobitomorph Naraoia are described. No molluses or deuterostomes have been identified. The preservational orientations of the various taxa are reviewed and compared with orientations of the Burgess Shale taxa. Orientation in the sediment is found to be closely correlated to the original shape of individuals. Several new genera and species are described: the segmented. worm-shaped Yunnanozoon lividum gen. et sp.n., the 'armoured lobopods' Onychodictyon ferox gen. et sp.n. and Cardiodictyon catenulum gen. et sp.n. and the arthropods Saperion glumaceum gen. et sp.n., Sinoburius Iunaris gen. et sp.n., and Xandarella spectaculum gen. et sp.n. 相似文献
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贵州凯里生物群中软舌螺的初步研究 总被引:1,自引:0,他引:1
本文描述了采自贵州台江县革东镇八郎中寒武世凯里生物群中的软舌螺化石,计有1种,3相似种和1个未定种。即:Ambrolinevitus cf.ventricosus,Glossolites?sp..Haplophrentis?cf.carinatus,Linevitus opimus,Hyolithes?cf.cariniferus.凯里生物群中软舌螺特点是:1)壳体通常较大,呈宽锥形;2)背、腹壳区分明显,常具中槽或中脊;3)特别是以软舌螺目中的软舌螺科和线带螺科的软舌螺保存数量最多。完全与欧洲、北美相当层位中出现的软舌螺组合面貌相似;并与澄江动物群中的软舌螺在演化特征上是可衔接的。凯里生物群中的软舌螺除具有世界性属种外。还具地区特有的属种。这对研究软舌螺的地理分布、演化进程以及与凯里生物群组合关系有重要意义。 相似文献
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Mao-yan Zhu Heyo Van Iten Robt S. Cox Yuan-long Zhao Bernd-D. Erdtmann 《Pal?ontologische Zeitschrift》2000,74(3):227-238
Rare phosphatic tubular fossils from the Lower-Middle Cambrian Kaili Formation of Guizhou Province, southern China were originally identified as non-calcified algae or ‘worms’ (ScoleciellusLiu). Re-examination of these fossils indicates that specimens identified as non-calcified algae areSphenothallus taijiangensis n. sp., while specimens identified asScoleciellus belong toByronia natus (Liu).Sphenothallus taijiangensis andByronia natus from Lower Cambrian strata in the Kaili Formation are the oldest known representatives of their genera. In addition,B. natus (Liu) is the only known species ofByronia with the exception ofB. annulata Matthew (Middle Cambrian, British Columbia). CambrovitusMao et al., a tubular fossil from Middle Cambrian strata in the Kaili Formation, originally was classified as a hyolithid. However, the discovery of a nearly complete specimen possessing an apical attachment disk shows thatCambrovitus, likeByronia andSphenothallus, probably was a thecate cnidarian polyp. 相似文献