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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 Spironema (gastropod) ： ウィキペディア英語版 Spironema (gastropod) †''Spironema'' is a genus of extinct (Cretaceous) sea snails, marine gastropod mollusks in the family Naticidae, the moon snails.〔Siemers C. T. & King N. R. (1974). "Macroinvertebrate paleoecology of a transgressive marine sandstone, Cliff House Sandstone (Upper Cretaceous), Chaco Canyon, northwestern New Mexico". ''New Mexico Geol. Soc. Guidebook'', 25th Field Conf., Ghost Ranch (Central-Northern N.M.): 267-277. (PDF ).〕 == Description == The American paleontologist Fielding Bradford Meek firstly defined this genus in 1864.〔 He classified the genus in the family Littorinidae.〔 He recognized two species ''Spironema bella'' and ''Spironema tenuilineata'' in 1864.〔 These species were previously classified within the family Trochidae.〔 Meek's diagnosis reads as follows:〔 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「Spironema (gastropod)」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.