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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 Arthracanthida ： ウィキペディア英語版 Arthracanthida Arthracanthida, a sub-class of Acantharea, is a group of marine protozoans. They consist mainly of a gelatinous sheath filled with cytoplasm and a skeleton of up to 20 radially placed spicules made of celestine (strontium sulfate). While mostly found in the upper areas of the ocean, they are able to move vertically by using microfilaments attached to the spicules to expand and contract the sheath. They are plentiful in the Gulf Stream during the summer months, but little is known about their overall distribution. ==References== *L. H. Hyman, The Invertebrates, vol. 1, McGraw-Hill, 1940 *T. Cavalier-Smith, Kingdom Protozoa and its 18 phyla, Microbiol. Rev., 57(4):953–994, 1993 *K. Hausmann and N. Hulsmann, Protozoology, Georg Thieme Verlag, New York, 1996 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「Arthracanthida」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.