Noun crossopterygii has 1 sense
  1. Crossopterygii, subclass Crossopterygii - fishes having paired fins resembling limbs and regarded as ancestral to amphibians
    --1 is a kind of class
    --1 is a member of Osteichthyes, class Osteichthyes
    --1 has members:
     crossopterygian, lobefin, lobe-finned fish; Latimeridae, family Latimeridae
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