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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 Chamaesipho grebneffi ： ウィキペディア英語版 Chamaesipho grebneffi ''Chamaesipho grebneffi'' is the first extinct member of the Notochthamalinae to be described, and the oldest chthamaloid barnacle known. This species is a fully derived ''Chamaesipho'', and indicates a considerable antiquity for Chthamaloidea. Three extinct species of ''Chthamalus'' from the middle Miocene of the faluns of Touraine, France were described in 2008 by Carriol. the New Zealand species is Oligocene, and considerably older. ==Discussion== Like the three living species of ''Chamaesipho'', the shell of ''C. grebneffi'' begins with 6 plates, fusing completely at about 2 mm diameter. Freegrown specimens show a stellate basal outline. The scutum is highly distinctive in tergal margin equal in length to basal margin. In all other ''Chamaesipho'', tergal margin is much shorter than basal.〔 The tergum is not definitely identified. ''Chamaesipho grebneffi'' is interpreted, from wear patterns on the shell, to have occupied high littoral positions on shore. Entire assemblage described by Buckeridge indicates shallow agitated waters of several habitat zones.〔 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「Chamaesipho grebneffi」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.