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''Marocella'' is a conical shelly fossil of uncertain affinity (probably a mollusc) known from Cambrian strata. == Morphology == Limpet-like ''Marocella '' is a low conical shell with concentric ridges that grew to a couple of centimetres in length. 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「Marocella」の詳細全文を読む スポンサード リンク
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