Sarcopterygii
Nota de aplicación
Class of vertebrate fish characterized by lobed paired fins with a fleshy base over a bony skeleton and joined to the body by a single bone, persisting notochord, internal nares, and two dorsal fins with separate bases as opposed to the single dorsal fin of ray-finned fishes. They are extremely ancient in origin, appearing in the Lower Devonian about 390,000,000 years ago. They gave rise to amphibians. In some classifications, it is listed as a c…