Actinopteri
Actinopteri is the sister group of Cladistia in the class Actinopterygii.
Dating back to the Permian period, the Actinopteri comprise the Chondrostei, the Holostei, and the teleosts; in other words, all extant ray-finned fish other than the bichirs.
In this clade the lungs have evolved into a swim bladder.
Characters of Actinopteri include paired fin structure, a single dorsal fin, fulcra, a large median gular and numerous branchiostegals, ganoid scales, and a valvula cerebelli in the brain.