Any of various bony fishes of the class Sarcopterygii, having paired fleshy rounded fins. The lobe-finned fishes first appeared in the Silurian Period and are extinct except for the coelacanths and lungfishes. Also called lobefin . Also called sarcopterygian .
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Any of various fishes of the class Sarcopterygii, having paired 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 Devonian Period and are extinct except for the coelacanth and lungfish. Also called sarcopterygian