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''Atops'' is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the late Atdabanian stage,〔 which lasted from 530 to 524 million years ago during the early part of the Cambrian Period. ==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「Atops」の詳細全文を読む スポンサード リンク
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