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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 Nereis ： ウィキペディア英語版 Nereis ''Nereis'' is a genus of polychaete worms in the family Nereidae. It comprises many species, most of which are marine, including the sandworm (''Nereis virens'') and the common clam worm (''Nereis succinea''). ''Nereis'' possess setae and parapodia for locomotion. They may have two types of setae, which are found on the parapodia. Acicular setae provide support. Locomotor chaetae are for crawling, and are the bristles that are visible on the exterior of the Polychaeta. ==Ecology== Nereis are osmoconformers. Nereids are dioecious and they release their haploid gametes into the water medium, a process called ''spawning''. Moreover, upon fertilization and mitotic divisions of the zygote. Nereids form a larval stage which is similar to that of molluscs – i.e. a trochophore larva. 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「Nereis」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.