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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 Receptaculites ： ウィキペディア英語版 Receptaculites ''Receptaculites'' is the name-bearing genus for a group of conspicuous benthic marine genera, the Receptaculitidae, that lived from the Early Ordovician through the Permian, peaking in the Middle Ordovician. The group's phylogenetic origin has long remained obscure, but current understanding indicates that the Receptaculitidae were probably calcareous algae of the Order Dasycladales. ''Receptaculites'' and its relatives have a double-spiral, radiating pattern of rhombus-shaped plates supported by spindle-like objects called meroms. Fossils can usually be identified by the intersecting patterns of clockwise and counterclockwise rows of plates or stalk spaces, superficially similar to the arrangement of disk florets on a sunflower -- hence the common name "sunflower coral" (''sic''). ==References== 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「Receptaculites」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.