bn:00019536n
Noun Concept
Categories: Prehistoric fish classes, Silurian fish, Devonian fish, Taxa named by Frederick McCoy, Placoderms
EN
Placodermi  class Placodermi
EN
Extinct group of bony-plated fishes with primitive jaws WordNet 3.0
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EN
Placodermi is a class of armoured prehistoric fish, known from fossils, which lived from the Silurian to the end of the Devonian period. Wikipedia
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