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Noun agnatha has 1 sense
  1. Agnatha, superclass Agnatha - superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys; hagfishes; some extinct forms
    --1 is a kind of class
    --1 is a member of
     Vertebrata, subphylum Vertebrata, Craniata, subphylum Craniata
     --1 has members:
     jawless vertebrate, jawless fish, agnathan; Ostracodermi, order Ostracodermi; Anaspida, order Anaspida; Conodonta, order Conodonta, Conodontophorida, order Conodontophorida; Cyclostomata, order Cyclostomata
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