Survival of crinoid stalk fragments and its taphonomic implications
スポンサーリンク
概要
- 論文の詳細を見る
Paleontological evidence indicates that crinoids (sea lilies : Echinodermata) were a major constituent of Paleozoic and Mesozoic shallow-marine communities (Meyer and Macurda, 1977; Cain, 1968). In the fossil record crinoid stalks usually occur in much greater abundance than other body parts such as arms and calyces. This difference has been attributed to selective preservation, the result of post-mortem process of fossilization or taphonomy (Baumiller and Ausich, 1992; Moore and Jeffords, 1968). Our observation of living crinoids in aquaria demonstrates that stalk fragments detached and isolated from a living crinoid survive more than one year, whereas other body parts tend to disarticulate rapidly. Such long survival of stalk fragments of crinoids firstly explains the dominance of crinoid stalks over other body parts in the fossil record, and secondly, and more importantly, it strongly suggests that such detached fossil stalks, as well as stalk pieces observed on today's sea floor, continued living for a long time, and were not dead body parts as previously considered.
- 日本古生物学会の論文
- 1998-04-30
著者
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Amemiya Shonan
Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo
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Amemiya S
Univ. Tokyo Tokyo Jpn
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Amemiya Shonan
Laboratory Of Innovational Biology Department Of Integrated Biosciences Graduate School Of Frontier
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Amemiya Shonan
Department Of Biological Sciences University Of Tokyo
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Oji Tatsuo
Earth and Planetary Science, University of Tokyo
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OJI TATSUO
Geological Institute, University of Tokyo
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Oji T
Univ. Tokyo Tokyo Jpn
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Oji Tatsuo
Geological Institute University Of Tokyo
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Amemiya Shonan
Department Of Biological Sciences And Misaki Marine Biological Station University Of Tokyo
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Amemiya Shonan
Department Integrated Biosciences Graduate School Of Frontier Sciences University Of Tokyo
関連論文
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- The Behavior and the Morphology of Sea Lilies with Shortened Stalks : Implications on the Evolution of Feather Stars(Animal Diversity and Evolution)
- DEVELOPMENT OF THE STALKED CRINOID, METACRINUS ROTUNDUS(Developmental Biology)(Proceeding of the Seventy-Third Annual Meeting of the Zoological Society of Japan)
- Timing of the potential of micromere-descendants in echinoid embryos to induce endoderm differentiation of mesomere-descendants
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- First Fossil Record of the Family Phormosomatidae (Echinothurioida : Echinoidea) from the Early Miocene Morozaki Group, Central Japan
- FUNCTIONS OF THE KRUPPEL-LIKE GENE IN THE SEA URCHIN MACROMERE(Developmental Biology,Abstracts of papers presented at the 76^ Annual Meeting of the Zoological Society of Japan)
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