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''Rotularia'' is an extinct genus of planispirally coiled fossil polychaete worms in the family Serpulidae. Owing to the gastropod-like shape of ''Rotularia'', many authors in the past interpreted this genus as being sea snails in the family Vermetidae. All ''Rotularia'' species were cemented to the substrate during their earliest growth stage, but they became detached shortly after the formation of the first whorls (Savazzi, 1995). Their tubes have two layers with different microstructure (Vinn, 2008). This genus is known from the early Kimmeridgian to Late Eocene (Jäger, 2004). ==References== *Jäger, M. 2004. Serpulidae und Spirorbidae (Polychaeta sedentaria) aus Campan und Maastricht von Norddeutschland, den Niederlanden, Belgien und angrenzenden Gebieten. Geologisches Jahrbuch (A) 157, 121–249. *Savazzi, E. 1995. Morphology and mode of life of the polychaete ''Rotularia''. Paläontologische Zeitschrift 69, 73–85. * 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「Rotularia」の詳細全文を読む スポンサード リンク
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