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''Ptilocaulis'' is a genus of demosponges. The species within this genus are usually red or orange. They are often called treesponges, as they grow many branches from a single stem resmebleing trees. They can grow to large size. 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「Ptilocaulis」の詳細全文を読む スポンサード リンク
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