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placoderm

/ˈplæk.ə.dɜːm/

翻译: 盾皮鱼是一类已灭绝的鱼形有颌脊椎动物,头部和身体前部覆盖有骨质甲板,在泥盆纪的海洋和河流中占主导地位,被认为是最早的有颌脊椎动物。

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noun

C2formalcommonscientific/ˈplæk.ə.dɜːm/

A noun referring to an extinct fish-like vertebrate with bony plates on its head and upper body, dominant in seas and rivers during the Devonian period, and considered the earliest vertebrate with jaws.

  • 🇨🇳盾皮鱼是一类已灭绝的鱼形有颌脊椎动物,头部和身体前部覆盖有骨质甲板,在泥盆纪的海洋和河流中占主导地位,被认为是最早的有颌脊椎动物。
  1. Extinct armored fish C2 formal scientific

    An extinct class of fish-like vertebrates that had bony plates covering the head and upper body, considered the earliest jawed vertebrates, dominant during the Devonian period.

    • Placoderms were among the first vertebrates to develop jaws.
    • Fossils of placoderms have been found in Devonian rock formations.
    • The largest known placoderm, Dunkleosteus, could grow up to 6 meters long.
    • Placoderms dominated both marine and freshwater environments during their time.

    🇨🇳盾皮鱼

  • placoderms plural form
  • placoderms' possessive plural form
  • placoderm's possessive singular form