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Stethacanthus : ウィキペディア英語版 | Stethacanthus
''Stethacanthus'' is an extinct genus of shark which lived from the Late Devonian to Early Carboniferous epoch, dying out around 320 million years ago. Fossils have been found in Europe and North America. ==Etymology== ''Stethacanthus'' comes from the Greek “steth” meaning “chest” and “akanthos” meaning “spine” or “thorn.” The name refers to the distinctive anvil-shaped first dorsal fin and spine displayed by mature males of the genus.
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「Stethacanthus」の詳細全文を読む
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