eurypterida

Noun
  1. Extinct aquatic arthropods of the Paleozoic (synset 101791061)
    is a type of: animal order - the order of animals
    member holonym: eurypterid - large extinct scorpion-like arthropod considered related to horseshoe crabs
    belongs to: class merostomata, merostomata - used in some classifications; includes the orders Xiphosura and Eurypterida
    same as: order eurypterida

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