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Pinnocaris
Pinnocaris is a genus of rostroconch mollusc known from the Cambro-Ordovician.〔 It was once considered as a possible ancestor to the scaphopods, but this no longer seems tenable. Original descriptions from material in southern Scotland had the organism as a bivalved arthropod, but its univalved disposition has since become clear.〔 ==References==
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「Pinnocaris」の詳細全文を読む
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