ostracoderm

Japanese: ostracoderm
ostracoderm

…a general term for fishes with hard exoskeletal armor that lived in the Paleozoic Era, including the jawless ostracoderms and jawed placoderms. The oldest is Anatolepis , found in the Late Cambrian strata.

*Some of the terminology explanations that mention "ostracoderm" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…古生代に生息した固い外骨格の装甲をもつ魚類の総称で,無顎綱の甲皮類ostracodermやあごのある板皮綱Placodermiに属する魚類が含まれる。最も古いものはカンブリア紀後期の地層から発見されているアナトレピスAnatolepisである。…

※「ostracoderm」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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