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Shell variability of Pseudocubus obeliscus Haeckel in the early autumn radiolarian fauna off Tassha, Sado Island, central Japan
http://hdl.handle.net/10191/2143
http://hdl.handle.net/10191/2143bfabad67-b270-49d5-932f-a22f79fdbb5d
名前 / ファイル | ライセンス | アクション |
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20_29-45.pdf (4.7 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2017-09-04 | |||||
タイトル | ||||||
タイトル | Shell variability of Pseudocubus obeliscus Haeckel in the early autumn radiolarian fauna off Tassha, Sado Island, central Japan | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Shell variability of Pseudocubus obeliscus Haeckel in the early autumn radiolarian fauna off Tassha, Sado Island, central Japan | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Pseudocubus obeliscus | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Radiolaria | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Sado Island | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Sea of Japan | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | shell variability | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
著者 |
Kurihara, Toshiyuki
× Kurihara, Toshiyuki× Matsuoka, Atsushi |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Shell variability of Pseudocubus obeliscus Haeckel within the early autumn radiolarian fauna collected from the Sea of Japan, off Tassha, Sado Island in 2001 is demonstrated based on detailed scanning electron microscopic observations and comparisons among morphologically varied specimens. Pseudocubus obeliscus has an inverted truncated-pyramidal skeleton consisting of an initial spicule, rings formed by several arches, columellae, and other secondary spines. The initial spicule is comprised of a median bar, an apical spine, a dorsal spine, two primary lateral spines, and an axial spine. The ventral spine and secondary lateral spines are absent. Comparative observations of morphologically varied specimens with reference to highly symmetrical, well-regulated specimens show that morphologic variation in P. obeliscus is caused by the transformation of angles between columellae and a primary ring, shape of the primary ring and columellae, and their combination. In addition, some secondary arches are formed for rebuilding a distorted pyramidal skeleton. Therefore, it is concluded that shell variability is expressed by the skeletal instability of some specific parts and self-organizing formation of secondary arches. | |||||
書誌情報 |
Science reports of Niigata University. (Geology) en : Science reports of Niigata University. (Geology) 巻 20, p. 29-45, 発行日 2005-03 |
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出版者 | ||||||
出版者 | 新潟大学理学部 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 13491237 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11436808 | |||||
著者版フラグ | ||||||
値 | publisher |