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''Not to be confused with Tantalum.'' ''Tantulum elegans'' is a species of freshwater slug, an aquatic shell-less gastropod mollusk within the clade Acochlidiacea. This species has no shell.〔 The maximum recorded length is 2 mm.〔Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". ''PLoS ONE'' 5(1): e8776. .〕 ''Tantulum elegans'' is the only species in the genus ''Tantulum'', and that is in turn the only genus in the family Tantulidae.〔Strong E. E., Gargominy O., Ponder W. F. & Bouchet P. (2008). "Global Diversity of Gastropods (Gastropoda; Mollusca) in Freshwater". ''Hydrobiologia'' 595: 149-166. .〕 == Taxonomy == In 2005, Tantulidae was classified as the only family within the superfamily Hedylopsoidea in the taxonomy of Bouchet & Rocroi. According to Schrödl & Neusser (2010)〔Schrödl M. & Neusser T. P. (2010). "Towards a phylogeny and evolution of Acochlidia (Mollusca: Gastropoda: Opisthobranchia)". ''Zoological Journal of the Linnean Society'' 158: 124-154. .〕 Tantulidae is in the clade Hedylopsacea.〔 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「Tantulum elegans」の詳細全文を読む スポンサード リンク
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