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placoderms

英[plə'kəʊdɜːmz] 美[plə'kəʊdɜːmz]
  • 盾皮鱼纲

详细释义

名词 placoderm:
  1. fish-like vertebrate with bony plates on head and upper body; dominant in seas and rivers during the Devonian; considered the earliest vertebrate with jaws

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