†order Pycnodontiformes Berg 1937 (ray-finned fish)
Parent taxon: Neopterygii according to J. A. Long 2011
Sister taxa: Ginglymodi, Halecostomi, Holostei, Macrosemiiformes, Scanilepiformes, Teleostei
Subtaxa: Akromystax, Arcodonichthys, Grypodon, Gyrodontoidei, Gyronchus, Ichthyoceras, Phacodus, Polygyrodus, Pycnodontoidei, Tibetodus, Trewavasia
Ecology: nektonic carnivore