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dc.contributor.author | Kumagae, Taro | en |
dc.contributor.author | Maeda, Haruyoshi | en |
dc.contributor.author | Komatsu, Toshifumi | en |
dc.contributor.alternative | 熊谷, 太朗 | ja |
dc.date.accessioned | 2011-10-06T07:11:41Z | - |
dc.date.available | 2011-10-06T07:11:41Z | - |
dc.date.issued | 2011-12 | - |
dc.identifier.issn | 0195-6671 | - |
dc.identifier.uri | http://hdl.handle.net/2433/147233 | - |
dc.description.abstract | The taphonomic features and paleoecology of this species were investigated focused on vertically embedded individuals of articulated Inoceramus amakusensis Nagao et Matsumoto. In the Hinoshima Formation, Himenoura Group of Kyushu, Japan, this Santonian (Late Cretaceous) inoceramid bivalve characteristically occurs in incised-valley fill siliciclastic marine deposits. Modes of I. amakusensis occurrence and preservation, from in situ (= occurrence in life position) to allochthonous shell fragments, are strongly affected by its paleoecology and depositional environments. Several I. amakusensis (up to 25 cm in shell height) were recovered from bioturbated sandstones associated with storm-influenced deposits. Their commissural planes are almost perpendicular to the bedding plane, with the anterior face oriented downward and the posteroventral portion extending upward. Furthermore, I. amakusensis is morphologically comparable to endobyssate mytilid bivalves today. These results suggest that this Cretaceous species was an orthothetic sand sticker at least during mid-ontogeny that preferentially inhabited a well-oxygenated, nearshore seafloor. I. amakusensis was distributed in various depositional environments and has been regarded as a recliner in offshore muddy substrate. However, the present discovery suggests that it was also well adapted, with an upright life position, to high-energy shallow clastic environments characterized by high sediment supply. | en |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Elsevier Ltd. | en |
dc.rights | © 2011 Elsevier Ltd. | en |
dc.rights | この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 | ja |
dc.rights | This is not the published version. Please cite only the published version. | en |
dc.subject | Himenoura Group | en |
dc.subject | Inoceramus amakusensis | en |
dc.subject | Paleoecology | en |
dc.subject | Santonian | en |
dc.subject | Upper Cretaceous | en |
dc.subject | Taphonomy | en |
dc.title | Paleoecology of Inoceramus amakusensis Nagao et Matsumoto, 1940 (Bivalvia) in a Late Cretaceous shallow clastic sea: The Himenoura Group, Kyushu, Japan | en |
dc.type | journal article | - |
dc.type.niitype | Journal Article | - |
dc.identifier.ncid | AA10616145 | - |
dc.identifier.jtitle | Cretaceous Research | en |
dc.identifier.volume | 32 | - |
dc.identifier.issue | 6 | - |
dc.identifier.spage | 738 | - |
dc.identifier.epage | 749 | - |
dc.relation.doi | 10.1016/j.cretres.2011.05.002 | - |
dc.textversion | author | - |
dcterms.accessRights | open access | - |
出現コレクション: | 学術雑誌掲載論文等 |
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