crossopterygian, lobefin, lobe-finned fish

any fish of the order Crossopterygii; most known only in fossil form

• coelacanth, Latimeria chalumnae — fish thought to have been extinct since the Cretaceous Period but found in 1938 off the coast of Africa

• bony fish — any fish of the class Osteichthyes

• Crossopterygii, subclass Crossopterygii — fishes having paired fins resembling limbs and regarded as ancestral to amphibians