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Paleontological study on the early phase of Cambrian Explosion based on the small shelly fossils and ichnofossils

Research Project

Project/Area Number 21540482
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Stratigraphy/Paleontology
Research InstitutionNagoya University (2010-2011)
The University of Tokyo (2009)

Principal Investigator

OJI Tatsuo  名古屋大学, 博物館, 教授 (50160487)

Project Period (FY) 2009 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2009: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsカンブリア紀 / 多細胞動物の多様化 / 進化 / 生痕化石 / 小型有殻化石 / ニューファンドランド / 貴州省 / ゴビ・アルタイ / 多細胞動物 / 多様化 / 中国 / 貴州 / 適応放散
Research Abstract

We investigated pattern of rapid evolution of metazoa occurred in the Early Cambrian, based on the ichnofossils and small shelly fossils sampled or observed from Newfoundland, Canada, Guizhou and Yunnan provinces, China and Gobi-Altai, Mongolia. As a result, following three things were clarified. 1. Two-staged, stepwise increase in the diversity and bedding plane bioturbation index were detected in the Treptichnus pedum and the Rusophycus avalonensis zones, the lowest biozones in the Lower Cambrian. In these zones, there were no development of a clear differentiation of ichnofossils according to different sedimentary facies, and also there is no clear ichnofossils detected on the upper surface of microbial mats. 2. Based on the detailed morphological studies on the protoconodonts from the lower Meishucun Stage in Yunnan Province, some of these are considered as grasping spines of chaetognaths(arrow worms). This discovery in turn suggests that there were predatory animals present in the mid-water column of the pelagic environment in the Early Cambrian. 3. We compared ichnofossils from two late Early Cambrian formations(Chintingshan and Balang), the former formation deposited slightly shallower environment than the latter. In this time, there was already differentiation of ichnofossils according to the different environments, which character was not detected in the ichnofossils from the earliest Cambrian of Newfoundland.

Report

(4 results)
  • 2011 Annual Research Report   Final Research Report ( PDF )
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (21 results)

All 2012 2011 2010 2009

All Journal Article (11 results) (of which Peer Reviewed: 10 results) Presentation (10 results)

  • [Journal Article] Experimental taphonomy of benthic chaetognaths : implications for the decay process of Paleozoic chaetognath fossils2011

    • Author(s)
      Casenove, D., Oji, T. and Goto, T
    • Journal Title

      Paleontological Reserch

      Volume: 15 Pages: 146-153

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Preface for the symposium" The Mesozoic revolution : a global biologic transformation"2011

    • Author(s)
      Oji, T. and Amano, K
    • Journal Title

      Paleontological Research

      Volume: 15 Pages: 53-53

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Experimental taphonomy of benthic chaetognaths : implications for the decay process of Paleozoic chaetognath fossils2011

    • Author(s)
      Casenove, D., Oji, T., Goto, T
    • Journal Title

      Paleontological Research

      Volume: 15 Issue: 3 Pages: 146-153

    • DOI

      10.2517/1342-8144-15.3.146

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The occurrence of the pseudoplanktonic crinoids Pentacrinites and Seirocrinus from the Early Jurassic Toyora Group, western Japan2011

    • Author(s)
      Hunter, A.W., Oji T., Okazaki Y
    • Journal Title

      Paleontological Research

      Volume: 15 Issue: 1 Pages: 12-22

    • DOI

      10.2517/1342-8144-15.1.012

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] New species of isocrinid crinoid Cbariocnnus japonicus (Articulata, Echinodermata) from the Lower Cretaceous Mitarai Formation (Tetori Groutp) of Takayama district central Japan2011

    • Author(s)
      Hunter, A.W., Oji, T., Ewin, T.A.M., Kitazawa, K
    • Journal Title

      Bulletin of the Mizunami Fossil Museum

      Volume: 37 Pages: 115-121

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Preface (The Mesozoic revolution : a global biologic transformation)2011

    • Author(s)
      Oji, T., Amano, K
    • Journal Title

      Paleontological Research

      Volume: 15 Issue: 2 Pages: 53-53

    • DOI

      10.2517/1342-8144-15.2.053

    • Related Report
      2011 Annual Research Report
  • [Journal Article] Habitat reconstruction of Oligocene elasmobranchs from Yamaga Formation, Ashiya Group, western Japan.2010

    • Author(s)
      Tomita, T., Oji, T.
    • Journal Title

      Paleontological Research

      Volume: 14 Pages: 69-80

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Particle selection by the sea lily Metacrinus rotundus Carpenter 1884 (Echinodermata Crinoidea)2010

    • Author(s)
      Kitazawa K., Oji, T.
    • Journal Title

      Journal of Experimental Marine Biology and Ecology

      Volume: 395 Pages: 80-84

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Staging of regeneration process of an arm of the feather star Oxycomn thus japonica focusing on oral-aboral boundary2010

    • Author(s)
      Shibata, T.F., Oji, T., Akasaka, K., Agata, K.
    • Journal Title

      Developmental Dynamics

      Volume: 239 Pages: 2947-2961

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Discovery of dense aggregations of stalked crinoids in Izu-Ogasawara Trench, Japan.2009

    • Author(s)
      T.Oji., Y.Ogawa, Hunter, A.W., K.Kitazawa
    • Journal Title

      Zoological Science 26

      Pages: 406-408

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Brominated anthraquinone pigments from the stalked crinoid Proisocrinus ruberrimus.2009

    • Author(s)
      K.Wolkenstein., W.Schoefberger, N.Muller, T.Oji
    • Journal Title

      Journal of Nature Product 72

      Pages: 2036-203

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Presentation] 中国貴州省下部カンブリア系Balang Formation及びChintingshan Formationの堆積相と生痕化石の変化2012

    • Author(s)
      大路樹生・望月貴史、David Casenove
    • Organizer
      日本古生物学会161回例会
    • Place of Presentation
      於群馬県富岡市生涯学習センター
    • Year and Date
      2012-01-21
    • Related Report
      2011 Final Research Report
  • [Presentation] カンブリア紀最初期の動物多様化と化石記録:ニューファンドランド、中国およびモンゴルのデータより2012

    • Author(s)
      大路樹生、望月貴史、David Casenove
    • Organizer
      日本古生物学会161回例会
    • Place of Presentation
      群馬県富岡市生涯学習センター
    • Year and Date
      2012-01-21
    • Related Report
      2011 Annual Research Report
  • [Presentation] 中国貴州省下部カンブリア系Balang Formation及びChintingshan Formationの堆積相と生痕化石の変化2012

    • Author(s)
      望月貴史、大路樹生, Zhao Yuanlong
    • Organizer
      日本古生物学会161回例会
    • Place of Presentation
      群馬県富岡市生涯学習センター
    • Year and Date
      2012-01-21
    • Related Report
      2011 Annual Research Report
  • [Presentation] 中新統師崎層群より産出したヒトデ・ウニ化石の生物地理的研究2011

    • Author(s)
      加藤萌、大路樹生
    • Organizer
      第8回棘皮動物研究集会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2011-12-10
    • Related Report
      2011 Annual Research Report
  • [Presentation] カンブリア紀におけるmicrobial mat形成時の底生生物活動の進化2011

    • Author(s)
      望月貴史・大路樹生
    • Organizer
      日本古生物学会第160回例会
    • Place of Presentation
      於高知大学
    • Year and Date
      2011-01-29
    • Related Report
      2011 Final Research Report
  • [Presentation] カンブリア紀におけるmicrobial mat形成時の底生生物活動の進化2011

    • Author(s)
      望月貴史・大路樹生
    • Organizer
      日本古生物学会第160回例会
    • Place of Presentation
      高知大学
    • Year and Date
      2011-01-29
    • Related Report
      2010 Annual Research Report
  • [Presentation] 生痕化石の多様化から探るカンブリア爆発の解明2010

    • Author(s)
      望月貴史・大路樹生
    • Organizer
      日本地球惑星科学連合2010年大会
    • Place of Presentation
      於幕張メッセ
    • Year and Date
      2010-05-24
    • Related Report
      2011 Final Research Report
  • [Presentation] 生痕化石の多様化から探るカンブリア爆発の解明2010

    • Author(s)
      望月貴史・大路樹生
    • Organizer
      日本地球惑星科学連合2010年大会
    • Place of Presentation
      幕張メッセ
    • Year and Date
      2010-05-24
    • Related Report
      2010 Annual Research Report
  • [Presentation] 生痕化石から見るカンブリア爆発2010

    • Author(s)
      望月貴文・大路樹生
    • Organizer
      日本古生物学会159回例会
    • Place of Presentation
      於琵琶湖博物館
    • Year and Date
      2010-01-30
    • Related Report
      2011 Final Research Report
  • [Presentation] 生痕化石から見るカンブリア爆発2010

    • Author(s)
      望月貴文・大路樹生
    • Organizer
      日本古生物学会159回例会
    • Place of Presentation
      琵琶湖博物館
    • Year and Date
      2010-01-30
    • Related Report
      2009 Annual Research Report

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Published: 2009-04-01   Modified: 2016-04-21  

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