On the Origin of Brooding Characteristics in Spirorbids with the Phylogeny of Sabellids and Serpulids (Annelida, Polychaeta, Sedentaria)

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  • ウズマキゴカイ類の保育習性の起源とカンザシゴカイ科およびケヤリ科の系統関係について
  • ウズマキゴカイ類の保育習性の起源とカンザシゴガイ科およびケヤリ科の系統関係について〔英文〕
  • ウズマキゴカイルイ ノ ホイク シュウセイ ノ キゲン ト カンザシゴガイカ

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Spirorbid species brood their embryos inside either the tube or operculum. THORP (1975) established the scheme of the evolution of brooding chamber of spirorbids, providing the link-species between Apomatus and cup-like opercular incubators. I note two serpulid species which can be considered as link-species between primitive Serpulidae and Spirorbidae. Rhodopsis pusilla has a bowl-like operculum and forming brood pouches on its tube walls, thus this species is a better link between Apomatus and cup-like opercular incubators, Duplicaria-like spirorbids. Salmacina spp. exhibiting tube incubation might be the link-species between serpulids and tube-incubating spirorbids.

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