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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Megapiranha ： ウィキペディア英語版 Megapiranha ''Megapiranha paranensis'' is an extinct serrasalmid characin fish from the Late Miocene (8–10 million years ago) of Argentina described in 2009.〔(Live Science: Toothy 3-foot Piranha Fossil Found )〕 It is thought to have been up to a meter in length. The Holotype consists only of premaxillae and a zigzag tooth row; the rest of its body is unknown.〔 (Summary of the paper )〕 This dentition is reminiscent of both the double-row seen in pacus, and the single row seen in the teeth of modern piranhas, suggesting that ''M. paranensis'' is a transitional form. ==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「Megapiranha」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.