lobe-finned fish

lobe-finned fish  (lbfnd)

n.

A member of the subclass Crossopterygii, a group of bony fishes with paired rounded fins, suggesting limbs, that are extinct except for the coelacanths. The lobe-finned fishes are regarded by some as ancestors of amphibians and other terrestrial vertebrates. Also called crossopterygian, lobefin.

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lobe-finned fish

Any of various fishes of the class Sarcopterygii, having fins that are rounded and fleshy, suggesting limbs. One group of lobe-finned fish are thought to be ancestors of amphibians and other land-dwelling vertebrate animals. They first appeared in the Ordovician Period and are extinct except for the coelacanth and lungfish. Also called sarcopterygian. Compare ray-finned fish. See also crossopterygian.

Thesaurus

Noun

1.

lobe-finned fish - any fish of the order Crossopterygii; most known only in fossil form crossopterygian, lobefin bony fish - any fish of the class Osteichthyes Crossopterygii, subclass Crossopterygii - fishes having paired fins resembling limbs and regarded as ancestral to amphibians coelacanth, Latimeria chalumnae - fish thought to have been extinct since the Cretaceous period but found in 1938 off the coast of Africa