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Megamastax
''Megamastax'' is a genus of lobe-finned fish which lived during the late Silurian period, about 423 million years ago. The generic name of ''Megamastax'' is Greek for 'big mouth' coming from ''megalos'' (big) and ''mastax'' (mouth). Fossils of ''Megamastax'' were found at Kuanti Formation in Qujing, Yunnan, China. Before the discovery of ''Megamastax'', it was thought that jawed vertebrates (gnathostomes) were limited in size and variation before the Devonian period. ''Megamastax'' is known only from jaw bones and it is estimated that it reached about 1 m long. ==References==
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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「Megamastax」の詳細全文を読む
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