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''Aptychodon'' (meaning "unwrinkled tooth") is an extinct genus of plesiosaur from the Cretaceous of what is now the Czech Republic. The genus was named by Reuss in 1855. ==See also== * Timeline of plesiosaur research * List of plesiosaur genera 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「Aptychodon」の詳細全文を読む スポンサード リンク
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