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Agraulos
''Agraulos'' is a genus of trilobite that lived during the Middle Cambrian in North America and Europe, particularly the Czech Republic. ''A. ceticephalus'' grew to approximately . == Etymology == ''Agraulos'' is derived from the Greek , "country woman" after a mythological figure that committed suicide after ignoring a warning from the goddess Athena and is a reference to the fact it is extinct. The species epithet ''ceticephalus'' is the contraction between (Kētos), "whale", "large fish" or "sea monster", and (Kephalos), "head", so "whale head" for the rounded rather effaced headshield that may be thought to look like a sperm whale.
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「Agraulos」の詳細全文を読む
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