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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 Obelia longissima ： ウィキペディア英語版 Obelia longissima ''Obelia longissima'' is a colonial species of hydrozoan in the order Leptomedusae. Its hydroid form grows as feathery stems resembling seaweed from a basal stolon. It is found in many temperate and cold seas world-wide but is absent from the tropics. ==Description== The sessile colonial stage of ''Obelia longissima'' is the most long-lived and the most easily observed of its life stages. The hydroid looks superficially like fronds of seaweed. It has a basal stolon growing in close proximity with the substrate. Out of this grow fragile, flexible stems up to high each with short side branches. As the stolon grows, new branches develop and the older ones are reabsorbed so the colony moves across the substrate. When the availability of food is high, further upright branches develop but when it is low, most growth takes place by way of stolon elongation and branching. The stems have dark-coloured, usually straight internodes between chitinous chambers called hydrothecae which are shaped like small wine-glasses. These protect the polyps. 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「Obelia longissima」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.