Actinopteri | |
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Atlantic sturgeon (Chondrostei) | |
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Atlantic salmon (Neopterygii) | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Actinopterygii |
(unranked): | Actinopteri Cope, 1871 |
Subclasses | |
Actinopteri (/æktɪˈnɒptəraɪ/) is the sister group of Cladistia (bichirs) in the class Actinopterygii (ray-finned fish).
Dating back to the Permian period, the Actinopteri comprise the Chondrostei (sturgeons and paddlefish), the Holostei (bowfins and gars), 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.[1]
Characters of Actinopteri include [2] paired fin structure, a single dorsal fin, fulcra, a large median gular and numerous branchiostegals, ganoid scales, and a valvula cerebelli in the brain.