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Thr Littorinoidea are a superfamily of both sea snails and land snails which have a gill and an operculum, terrestrial and marine gastropod mollusks in the clade Littorinimorpha. The terrestrial family within this group, the Pomatiidae, are sometimes called "land winkles"〔 Journal of Molluscan Studies, GENETIC AND MORPHOLOGICAL VARIATION IN THE LAND WINKLE POMATIAS ELEGANS (MÜLLER) (CAENOGASTROPODA: POMATIASIDAE) Volume 67, Issue 2, pp 145–152 (http://mollus.oxfordjournals.org/content/67/2/145.abstract) Accessed 2014-9-2〕 because the group originated in the sea and the closely related family Littorinidae are known as "winkles". ==Taxonomy== These families and subfamilies have been recognized in the taxonomy of Bouchet & Rocroi (2005): * Littorinidae Children, 1834 - the periwinkles * *Subfamily Littorininae Children, 1834 * *Subfamily Lacuninae Gray, 1857 * *Subfamily Laevilitorininae Reid, 1989 * † Bohaispiridae Youluo, 1978 * Pickworthiidae Iredale, 1917 * * Subfamily Pickworthiinae Iredale, 1917 (synonym: Reynellonidae Iredale, 1917) * * Subfamily Pelycidiinae Ponder & Hall, 1983 * * Subfamily Sherborniinae Iredale, 1917 * Pomatiidae Newton, 1891 (1828) * * Subfamily Pomatiinae Newton, 1891 * * Subfamily Annulariinae Henderson & Bartsch, 1920 * † Purpurinidae Zittel, 1895 * Skeneopsidae Iredale, 1915 * † Tripartellidae Gründel, 2001 * Zerotulidae Warén & Hain, 1996 (Extinct taxa are indicated by a dagger, †.) ;Families brought into synonymy: * Bembiciidae: synonym of Lacuninae * Cyclostomatidae: synonym of Pomatiidae * Ericiidae: synonym of Pomatiidae * Faxiidae: synonym of Sherborniinae * Lacunidae: synonym of Littorinidae * Melarhaphidae: synonym of Littorininae * Reynellonidae: synonym of Pickworthiinae * Risellidae: synonym of Lacuninae 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「Littorinoidea」の詳細全文を読む スポンサード リンク
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