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Exutaspis
''Exutaspis megista'' is an extinct, "giant" buchanosteid arthrodire placoderm. Its fossils have been found in the Late Emsian-aged marine strata of the Jiucheng and Haikou Formations in Wuding, Yunnan. It was originally described as a phlyctaeniid. Later, after comparison with the Chinese ''Buchanosteus guanxianesis'', ''Exutaspis'' was reappraised as a buchanosteid. The holotype, a "head roof," is long. ==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「Exutaspis」の詳細全文を読む
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