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Speciation of the genus Arthricocephalus Bergeron, 1899 (Trilobita) from the late Early Cambrian and its stratigraphic significance

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Progress in Natural Science:Materials International 2006年第6期16卷 614-623页

作者： YUAN Jinliang, zhao yuanlong and {{2. xinglian (nanjing institute of geology and palaeontology, chinese academy of sciences, nanjing 2.0008, china College of Resource and Environment of Guizhou University, Gui{{2. 550003, china) [a] nanjing institute of {{2. and palaeontology Chinese Academy of Sciences Nanjing China [b] College of Resource and Environment of Guizhou University Guiyang China

The genus Arthricocephalus Bergeron, 1899 is revised, and Halipanktos Balker & Peel, 1997 is suggested here as a senior synonym. The subgenus Arthricocephalus (Arthricocephalites) Chien & Lin in Lu et al. , 1974 is considered as a separate genus. Of the 2. previously assigned species of Arthricocephaius (Arthricocephalus) Bergeron, 1899, Arthricocephalus (Arthricocephalites) Chien & Lin in Lu et al. , 1974, Arthricocephalus (Euarthricocephalus) Ju, 1983 are lumped into eight species. The speciation trend of Arthricocephalus and Arthricocephalites is demonstrated based on their stratigraphic occurrences. It not only enhances the resolution of the biostatigraphic zonation in the uppermost Lower Cambrian, but also represents a potential candidate to define the Duyunian stage. The base of the stage is suggested at the first appearance datum (FAD) of Arthricocephalus chauveaui Bergeron, 1899 within the evolutionary lineage from Ar. jiangkouensis Yin in Yin & Li, 1978 to Ar. chauveaui in a global scale.

关键词： late Early Cambrian Duyunian stage speciation of Arthricocephalus and Arthricocephalites biostratigraphy.

A restudy of Oryctocephalus indicus (Reed,1910)

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Progress in Natural Science:Materials International 2006年第11期16卷 1177-1182页

作者： zhao yuanlong~1**, YUAN Jinliang~{2. PENG Shanchi~ {2.3 , {{2. xinglian~1, PENG Jin~1, LIN Jihpai~4, and GUO Qingjun~5(1. College of Resource and Environment of Guizhou University, Gui{{2. 550003, china {2. nanjing institute of geology and {12., chinese academy of sciences, nanjing 2.0008, china 3. State Key Laboratory of Papaeobiology and Stratigraphy, nanjing institute of geology and {12., nanjing 2.0008, china 4. Department of Geological Science, Ohio State University, Columbus, OH 43{2.0, USA 5. institute of Geochemistry, chinese academy of sciences, Gui{{2. 55000{2. china) College of Resource and Environment of Guizhou University Guiyang 550003 China nanjing institute of {{2. and palaeontology Chinese Academy of Sciences Nanjing 210008 China State Key Laboratory of Papaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Nanjing 210008 China Department of Geological Science Ohio State University Columbus OH 43210 United States institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

Restudy on morphology of Oryctocephalus indicus (Reed, 1910), based on specimens from Guizhou, china and Nevada USA, suggests that the subspecies regarded previously as Oryctocephalus indicus indicus (Reed, 1910), O. indicus latus zhao et Yuan {2.0{2. and O. indicus kobayashi Saito, 1934, are synonymous, and Oryctocephalus americanus Sundberg et McCollum, {2.03 is a similar form of O. indicus. Oryctocephalus indicus is rediagnosed as having a glabella that is subconical in outline and tapering forward slightly; a thorax that comprises 1{2.segments, and a small pygidium that bears {2.3 axial rings with a terminal piece and a postaxial ridge. Oryctocephalus indicus is widely distributed in eastern Guizhou and ranges through a great interval of Kaili Formation. Its first appearance is almost identical with these events of trilobite extinction-recovery occurring at the end of the Early Cambrian, the alternation of acritach assemblages, the change of trace elements (REE) and stable isotopes (carbon) at the Wuliu-Zengjiaya section. As one of the key forms for defining the traditional Lower-Middle Cambrian boundary (the base of Cambrian Series 3 and Stage 5 in the new Cambrian chronstratigraphic standard), O. indicus has received detailed study and has more advantages than other species such as Ovatoryctocara granulata Tchernysheva, 196{2.or Arthricocephalus chauveaui Bergeron, 1899.

关键词： Oryctocephalus indicus restudy Kaili Formation Cambrian Guizhou china.

The occurrence of the genus Marrella(Trilobitoidea) in Asia

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Progress in Natural Science:Materials International 2003年第9期 70-73页

作者： zhao yuanlong, YUAN Jinliang, ZHU Maoyan, {{2. xinglian and PENG Jing (1. institute of palaeontology and Biomineralization, School of Resource and Environment, Guizhou University of Technology, Gui{{2. 550003, china {2. nanjing institute of geology and palaeontology,{1{2., nanjing 2.0008, china) institute of palaeontology and Biomineralization School of Resource and Environment Guizhou University of Technology Guiyang 550003 China nanjing institute of {{2. and palaeontology Chinese Academy of Sciences Nanjing 210008 China

An important discovery in the Kaili Biota has been made recently, and many interesting components from ChengjiangBiota and Burgess Shale Biota have been discovered. Among them Marrella, only known from mid-Middle Cambrian Burgess Shale Biotaof British Columbia, Canada, is one of the most important arthropods fossils. Because the Kaili Biota is older than the Burgess Shale Biota,the strange head shield of Marrella occurring in the Kaili Biota outside Laurentia ranges from mid-Middle Cambrian to early Middle Cam-brian and is significant for the reconstruction of palaeogeography and evolutionary study of early metazoa. In the present paper Marrellasp. is reported for the first time in Asia.

关键词： Marrella early Middle Cambrian Kaili Biota Asia.

Progress and significance in research on the early Middle Cambrian Kaili Biota, Guizhou Province, china

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Progress in Natural Science:Materials International 2002年第9期 11-16页

作者： zhao yuanlong, YUAN Jinliang, ZHU Maoyan, {{2. Ruidong, GUO Qingjun, PENG Jin and {{2. xinglian(1. institute of Paleontology and Biomineralization, School of Resource and Environment, Guizhou University of Technology, Gui{{2. 550003, china: {2. nanjing institute of geology and Paleontology,{12.,{1{2., china 3. Gui{{2. institute of Geochemistry,{12., Gui{{2. 550003, china) institute of Paleontology and Biomineralization School of Resource and Environment Guizhou University of Technology Guiyang 550003 China nanjing institute of {{2. and Paleontology Chinese Academy of Sciences Nanjing 210008 China Guiyang institute of Geochemistry Chinese Academy of Sciences Guiyang 550003 China

Important progress in research on the Kaili Biota has been made recently. Many interesting components from Chengjiang Biota and Burgess Shale Biota have been discovered, e. g. Microdictyon of lobopodia; Ottaia, Palaeoscolex of worms; Naraoia, Marrella of Trilobitioidea, Mollisonia, anamalocarids and other non-trilobite arthropods; and new sorts of echinoder-mas, macroalage fossils and so on. Recent work on the Kaili Biota has resulted in the following developments: (i) an increase in the number of animal genera, up to more than 100 genera in total, so that the Kaili Biota has become the third most diverse of the Burgess Shale-type Biota after the Burgess Shale and Chengjiang Biotas ; and (ii) the most noteworthy fossils in the Kaili Biota are echinoderms, non-trilobite arthropods and soft-bodied medusiform fossils, especially the most diverse echinoderms. The progress provides envidence for the biodiversity of marine organisms presented after the "Cambrian Explosion" and serves as a link between the ear

关键词： Kaili Biota three biotas biodiversity.

Geochemistry of the trace elements and rare-earth elements at the boundary between Cambrian Series 2.and Series 3 at Jianshan,South china:Paleoenvironmental and stratigraphic implications

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chinese Journal Of Geochemistry 2012年第4期31卷 465-475页

作者： yang xinglian {{2. yuanlong GUO Qingjun yang Hong College of Resource and Environment Guizhou UniversityGuiyang 550003China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China Center of Environmental Remediation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

The Jianshan section in Jianhe County,Guizhou Province,is a very important auxiliary section to the candidate stratotype at the boundary between Cambrian Series 2.and Series *** four samples collected from the Jianshan section of the Kaili Formation were analyzed for the concentrations of trace element and rare-earth elements(REEs) by inductively coupled plasma mass *** trace element and REE geochemical characteristics of the Kaili Formation at the Jianshan section show that trace element composition and REE distribution patterns across the section are ***,at 44 m above the base of the Kaili Formation,most trace element contents and REEs concentrations are lower than those values observed below 44 *** 44 m,an increasing trend in the concentration of both trace elements and REEs is *** geochemical data indicate important,but subtle,changes at the 44 m *** this is,in fact,verified by work in progress,geochemical criteria can provide additional supports for defining the top surface of Cambrian Series 2.especially in sections where Oryctocephalus indicus is *** element ratios,specifically Ni/Co,V/Cr,V/(Ni+V) and Th/U as well as Ce and Eu anomalies indicate that the sedimentary environment of the Kaili Formation at the Jianshan section was oxidizing,that benthic redox conditions were less oxic,and may have been influenced by freshwater as compared to the Balang ***,the Eu anomalies observed in the Kaili Formation are similar to the negative Eu anomalies observed in post-Archean sedimentary rocks,and reveal fluctuations in oxygen content from the bottom to the top of the Kaili Formation.

关键词：稀土元素地球化学特征微量元素组成寒武系电感耦合等离子体质谱法边界古环境剖面显示地层

贵州早、中寒武世斗篷海绵科(Choiidae)的发现

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微体古生物学报 2003年第3期20卷 286-295页

作者：杨兴莲赵元龙吴维义中国科学院南京地质古生物研究所南京210008 贵州工业大学资源环境学院贵阳550003 贵州开磷集团宏盛公司开阳550302

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. 2. 2.定种 :Choia zunyiensis ***.,Choia sp.,Choiaella ovata... 详细信息

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. 2. 2.定种 :Choia zunyiensis ***.,Choia sp.,Choiaella ovata ***.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。

关键词：海绵动物牛蹄塘组生物群凯里生物群寒武世贵州化石标本

Organic Carbon Isotopic Evolution during the Ediacaran-Cambrian Transition Interval in Eastern Guizhou,South china: Paleoenvironmental and Stratigraphic Implications

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Acta Geologica Sinica(English Edition) 2007年第2期81卷 194-203页

作者： yang xinglian ZHU Maoyan GUO Qingjun {{2. yuanlong College of Resource and Environment Guizhou University Guiyang Guizhou 550003 State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing Jiangsu 210008 State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang Guizhou 550002

Secular variations of carbon isotopic composition of organic carbon can be used in the study of global environmental variation, the carbon cycle, stratigraphic delimitation, and biological evolution, etc. Organic carbon isotopic analysis of the Nangao and Zhalagou sections in eastern Gnizhou reveals a negative excursion near the Precambrian-Cambrian boundary that correlates with a distinct carbonate carbon isotopic negative excursion at this boundary globally. Our results also demonstrate that several alternating positive and negative shifts occur in the Meishucunian, and an obvious negative anomaly appears at the boundary between the Meishucunian and Qiongzhusian. The isotope values are stable in the middle and lower parts but became more positive in the upper part of the Qiongzhusian. Evolution of organic carbon isotopes from the two sections in the deepwater facies can be well correlated with that of the carbonate carbon isotopes from the section in the shallow water facies. Integrated with other stratigraphic tools, we can precisely establish a lower Cambrian stratigraphic framework from shallow sheff to deep basin of the yangtze Platform.

关键词： organic carbon isotope chemostratigraphy Cambrian Ediacaran Gnizhou yangtze Platform

Kaili Biota: A Taphonomic Window on Diversification of Metazoans from the Basal Middle Cambrian: Guizhou, china

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Acta Geologica Sinica(English Edition) 2005年第6期79卷 751-765页

作者： zhao yuanlong ZHU Maoyan Loren E. BABCOCK YUAN Jinliang Ronald L. PARSLEY PENG Jin {{2. xinglian wang yue College of Resource and Environment Engineering Guizhou University Guiyang Guizhou 550003 China nanjing institute of {{2. and palaeontology Chinese Academy of Sciences Nanjing Jiangsu 210008 China Department of Geological sciences 125 South Oval Mall The Ohio State University Columbus Ohio 43210 USA Department of Earth and Environmental sciences Tulane University New Orleans LA 70118 USA

A Burgess Shale-type biota is, in part, characterized by a wide diversity of taxa and soft-part preservation. Each provides unique historical insights into early metazoan evolution. Among the more than 40 globally distributed biotas, the early Cambrian Chengjiang and Middle Cambrian Burgess-type biotas are the largest. The Kaili Biota, from the earliest Middle Cambrian of Guizhou, china, contains representatives of 110 metazoan genera belonging to 10 phyla. It contains many well-persevered soft-bodied specimens. This chinese biota has become the third most taxonomically diverse Burgess Shale-type fauna. Because the Kaili Biota formed in an outer-shelf environment, its main faunal character is large numbers of eocrinoids and planktoic trilobites. The Kaili is younger than the Chengjiang Biota but older than the Canadian Burgess Shale Biota; it shares 30 genera with the Chengjiang and 38 genera with the Burgess Biota. The Kaili Biota displays a taphonomic window to the diversification and evolution of marine offshore organisms covering 5.13 million years between the Early and Middle Cambrian.

关键词： Kaili Biota Burgess Shale-type biodiversity marine organisms Taijiangian Cambrian Guizhou china

贵州第一枚标准层型剖面及点位(GSSP)金钉子——寒武系苗岭统及乌溜阶研究与意义

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贵州地质 2021年第3期38卷 229-237页

作者：赵元龙袁金良郭庆军尹磊明杨兴莲王春江杨瑞东王约杨宇宁陈圣光罗雪贵州大学贵州贵阳550025 中国科学院南京地质古生物研究所江苏南京210008 中国科学院地理科学与资源研究所北京100001 中国石油大学北京102249

2.18年6月2.日,国际地科联全票通过批准寒武系第三统为苗岭统,第5阶为乌溜阶的全球标准层型及点位(GSSP)的建议,落户在中国贵州八郎,这是我国获得的第11个金钉子,使我国成为拥有金钉子最多的国家。由贵州大学赵元龙为首的由贵州大学及... 详细信息

2.18年6月2.日,国际地科联全票通过批准寒武系第三统为苗岭统,第5阶为乌溜阶的全球标准层型及点位(GSSP)的建议,落户在中国贵州八郎,这是我国获得的第11个金钉子,使我国成为拥有金钉子最多的国家。由贵州大学赵元龙为首的由贵州大学及中科院南京古生物研究所等单位组成的国际研究团队,历时35年,通过三叶虫、疑源类地层、层序地层,无机及有机地球化学等多学科综合研究,经过了激烈的多国竞争而获得,成为全球同期地层对比中心。

关键词： “金钉子” 寒武系,苗岭统及乌溜阶全球同期地层对比贵州