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Brachydeiroidea : ウィキペディア英語版 | Brachydeiroidea
Brachydeiroidea is a superfamily of small to moderately large-sized arthrodire placoderms from the Late Devonian of Europe and Eastern North America. Brachydeiroids have, in cross section, a highly compressed body, a pointed, sometimes highly elongated snout, and tremendous orbits. The plates of the trunk shield are noticeably shortened: in ''Synauchenia'', the trunk shield and head shield are fused together as a single, immovable unit. The superficial anatomy of brachydeiroids is extremely diverse.〔 ==Families==
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「Brachydeiroidea」の詳細全文を読む
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