Title |
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ja
富山県南部の上部ジュラ系手取層群桐谷層から産出した生痕化石 Schaubcylindrichnus
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en
Trace fossil Schaubcylindrichnus from the Upper Jurassic Kiritani Formation (Tetori Group), southern Toyama Prefecture
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Subject |
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Other
生痕化石
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Schaubcylindrichnus
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桐谷層
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手取層群
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上部ジュラ系
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trace fossil
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Schaubcylindrichnus
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Kiritani Formation
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Tetori Group
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Upper Jurassic
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Description |
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富山県南部に分布する上部ジュラ系手取層群桐谷層から,生痕化石Schaubcylindrichnus が産出した.標本は断片的であるが,“S. freyi” あるいは “S. formosus”に類似した産状を示す.また,水平棲管の垂直横断面が横楕円形に変形していることから,形成時に著しい圧密を被ったと考えられる.産出標本から,ギボシムシ類,無足類のナマコやタケフシゴカイといった多毛類,あるいはそれらと類似した生態の底生生物が桐谷層堆積時の海底に生息していたと推定される.
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Other
Trace fossil Schaubcylindrichnus isp. is yielded from the Upper Jurassic Kiritani Formation (lower part of the Tetori Group) distributed in southern Toyama Prefecture. Although the obtained specimens are fragmentary, their modes of occurrences are comparable to “S. freyi” or “S. formosus”. The subhorizontal tubes tend to be horizontal elliptical configurations in vertical sections and show they suffered strong compaction. The trace fossil indicates certain taxa of enteropneusts, holothurians and polychaetes or endobenthos similar ethology to them existed in the Kiritani Basin.
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Publisher |
富山市科学博物館
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Date |
Created2018-10-30
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Issued2015-06-20
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Language |
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Resource Type |
departmental bulletin paper |
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VoR |
Identifier |
URI
http://repo.tsm.toyama.toyama.jp/?action=repository_uri&item_id=1034
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isIdenticalTo
NAID
120006632429
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Journal |
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NCID
AA12306127
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ISSN
1882-384X
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富山市科学博物館研究報告 = Bulletin of the Toyama Science Museum
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Volume Number39
Page Start1
Page End6
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File |
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Oaidate |
2022-10-02 |