sarcopterygian noun2 •Any lobe-finned fish of the class Sarcopterygii, including the lungfish and coelacanths.Many sarcopterygians have a lung as a respiratory organ. — 2012 •Any member of the clade that contains both lobe-finned fish and tetrapods (land vertebrates).All sarcopterygians are characterized by the evolutionary innovation of having the pectoral fins articulating with the shoulder girdle by a single element, known as the humerus in tetrapods. — 2004 formssarcopterygians
