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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 Acteonoidea ： ウィキペディア英語版 Acteonoidea Acteonoidea is a superfamily of sea snails, or bubble snails, marine gastropod mollusks. == Taxonomy == In the taxonomy of Bouchet & Rocroi (2005), the superfamily Acteonoidea has been included into the informal group "Lower Heterobranchia" (Heterostropha ''sensu'' Ponder & Warén, 1988), also known as the Allogastropoda. Only one of analyses by Jörger et al. (2010)〔 indicates the Acteonoidea sister to Nudipleura.〔 This clade that had resulted repeatedly in molecular studies with still limited "lower heterobranch" taxon sampling, either in a derived position or as a basal offshoot within Euthyneura.〔 A recent molecular phylogeny on Acteonoidea suggest a common origin with lower heterobranch Rissoelloidea and a sister group relationship to Nudipleura.〔Gbbeler K. & Klussmann-Kolb A. (2010). "The phylogeny of the Acteonoidea (Gastropoda): molecular systematics and first detailed morphological study of ''Rictaxis punctocaelatus'' (Carpenter, 1864)". ''Journal of Molluscan Studies'' 76(4): 303-316. .〕〔 While the basal position of Acteonoidea was commonly accepted, some authors doubted the basal position of Nudipleura, which was originally considered as a highly derived taxon, and suspect rate heterogeneity and deviant base composition as causing this unnatural grouping.〔 Based on potential synapomorphies in the reproductive system (presence of a ciliary stripe within the ampulla, androdiaulic or triaulic pallial gonoduct), Ghiselin already suggested a relationship between Acteonoidea and Nudipleura.〔 However, Acteonoidea form a well-supported "lower heterobranch" clade with Rissoelloidea, confirming results by Aktipis et al. and Dinapoli and Klussmann-Kolb.〔 The latter authors also recovered Nudipleura as the first offshoot of Euthyneura, which is confirmed by our study. Salvini-Plawen and Steiner grouped Umbraculoidea with Nudipleura, but none of the recent molecular or morphological studies support such a relationship.〔 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「Acteonoidea」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.