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placodermi

/ˌplæk.əˈdɜːr.maɪ/

翻译: 已灭绝的一类史前盾皮鱼类,具有原始的颌和覆盖头部及胸部的骨质甲片。

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noun

/ˌplæk.əˈdɜːr.maɪ/C2formalscientific
  • zh已灭绝的一类史前盾皮鱼类,具有原始的颌和覆盖头部及胸部的骨质甲片。

An extinct class of prehistoric, armored fish that possessed primitive jaws and bony plates covering their heads and thoraxes.

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  1. Extinct armored fishC2formalscientific

    An extinct class of prehistoric, jawed fishes characterized by heavy bony plates covering the head and thorax.

    zh盾皮鱼纲

    • Placodermi dominated the Devonian seas and rivers.
    • Fossils of Placodermi show the earliest known jaws in vertebrate history.
    • The largest known placoderm, Dunkleosteus, could grow up to 6 meters long.