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Yuknessia
''Yuknessia'' is an early pterobranch, known from the Burgess shale, the Chengjiang and the Wheeler shale.〔 Long, unbranched fronds emerge from a central holdfast-like body covered in small conical plates. The genus contains two species: the type species ''Y. simplex'' and ''Y. stephenensis'' It was originally interpreted as a green alga, and has since been reinterpreted it as a colonial pterobranch.〔 == External links ==
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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「Yuknessia」の詳細全文を読む
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