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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 Rotorboides ： ウィキペディア英語版 Rotorboides ''Rotorboides'' is a recent (Holocene) bottom dwelling (benthic) foram from the Atlantic, Pacific and Indian Oceans, related to ''Rosalina''. The test is trochospiral and planoconvex, with a broadly rounded periphery and about six to nine chambers in the final whorl. Sutures on the spiral side are crescentic and strongly oblique. Chambers on the umbilical side are subtriangular, each with a triangular folium, or flap, that extends into the umbilical area, folia of successive chambers fuse to form an umbilical plate that is solid or has only rare perforations. Sutures on the umbiical side are radial and deeply incised. The test wall is calcareous, coarsely perforate on the spiral side, but imperforate adjacent to the sutures. The umbilical side is imperforate and smooth. The aperture is an interiomarginal arch, outside the umbilicus, extending nearly to the periphery. ==References== *Alfred R. Loeblich Jr and Helen Tappan, 1988. Forminiferal Genera and their classification. Geological Survey of Iran, (e-book) 2005. () 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「Rotorboides」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.