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''Pleioptygma helenae'' is a species of sea snail, a marine gastropod mollusk in the family Pleioptygmatidae. It is the only known living species in this genus and the only extant species in the family Pleioptygmatidae.〔Quinn J. F. Jr. (1989). "Pleioptygmatidae, a new family of mitriform gastropods (Prosobranchia: Neogastropoda)". ''The Nautilus'' 103(1): (13 )-19.〕 ==Distribution== Honduras.〔Petuch E. J. (1980). "A new ''Falsilyria'' (Volutidae) and a new ''Conus'' (Conidae) from Roatan Island, Honduras (Atlantic)". ''The Nautilus'' 64(3): (115 )-118.〕 The type locality is Gorda Bank, Honduras.〔 Fossil record from Neogene include southeastern USA.〔 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「Pleioptygma helenae」の詳細全文を読む スポンサード リンク
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