单词 | Arthrodira |
释义 | Arthrodiraplural noun Ar·thro·di·ra : a group of Devonian fishes forming a subclass of Placodermi or especially formerly an order of Ostracodermi or a separate class and having the forepart of the body protected by bony plates and with an imperfectly ossified internal skeleton see coccosteidae , dinichthys arthrodiran ¦⸗⸗¦dīrən arthrodire ˈ⸗⸗ˌdī(ə)r plural -s arthrodirous -¦dīrəs |
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