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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Elphidium ： ウィキペディア英語版 Elphidium ''Elphidium'' is a genus of foraminiferan protozoa, one of the more common genera found near coasts. Like other forams, fossils from different species are used to date rocks. ==Description== ''Elphidium'' is one of the more beautiful foraminiferans and once seen easy to recognize. The test (shell) is lenticular, composed of finely perforate, bilamellar, optically radial, or less commonly granular, calcite, planispirally enrolled. Coiling is involute or partially evolute, with seven to twenty chambers in the final whorl and may have umbilical plug on each side. In some species the rim is sharp, keel-like, in others more rounded. The most diagnostic feature, perhaps, are the retral processes (small backward extensions of the chamber walls) that cross the sutures; giving some the appearance of tiny rolled up glass baskets . 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Elphidium」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.