Sarcopterygii

The Sarcopterygii or lobe-finned fishes (from Greek σαρξ sarx, flesh, and πτερυξ pteryx, fin) – sometimes considered synonymous with Crossopterygii ("fringe-finned fish", from Greek κροσσός krossos, fringe) – constitute a clade (traditionally a class or subclass) of the bony fishes, though a strict classification would include the terrestrial vertebrates. The living sarcopterygians are the coelacanths, lungfishes, and the tetrapods.