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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 Phoronis ovalis ： ウィキペディア英語版 Phoronis ovalis ''Phoronis ovalis'' is a species of marine horseshoe worm in the phylum Phoronida. It is found in shallow waters in the northeastern Atlantic Ocean, the southeastern Atlantic Ocean, Argentina, and other scattered locations worldwide. These worms secrete a tube into which they can retreat, and burrow into the shells of molluscs. ==Description== ''Phoronis ovalis'' is a small horseshoe worm growing to an extended length of and a diameter of . It exhibits many primitive traits. The lophophore is simple and oval in shape, with 11 to 28 tentacles. The giant nerve fibre typical of the genus is not present. The animal is transparent, sometimes with a brownish lophophore. The haemal, excretory and nervous systems are bilaterally symmetrical, which is not the case with other members of the genus. 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「Phoronis ovalis」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.