crossopterygian

Noun
  1. Any fish of the order Crossopterygii;
    Most known only in fossil form (synset 102517845)
    is a type of: bony fish - any fish of the class Osteichthyes
    subtypes: coelacanth, latimeria chalumnae - fish thought to have been extinct since the Cretaceous period but found in 1938 off the coast of Africa
    belongs to: crossopterygii, subclass crossopterygii - fishes having paired fins resembling limbs and regarded as ancestral to amphibians
    same as: lobe-finned fish, lobefin

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