Invalid subtaxa: Catodontidae Cuvier 1836, Orca semseyi Bockh 1899 [invalid subgroup], Orcinus semseyi Bockh 1899 [invalid subgroup], Orcopsis Van Beneden 1876 [nomen dubium], Palaeophoca Van Beneden 1859 [nomen nudum], Paleophoca Van Beneden 1859 [nomen nudum], Physeter antiquus Leidy 1853 [nomen dubium], Physeterina Gray 1825, Physetodon McCoy 1879 [nomen dubium], Physiter antiquus Leidy 1853 [nomen dubium], Physodontidae Lydekker 1894 [invalid subgroup], Physotherium Portis 1886 [nomen dubium], Priscophyseter Portis 1886 [nomen dubium], Scaldicetus lodgei Chapman 1917 [nomen dubium], Ziphioides Probst 1886 [nomen dubium], Ziphiola Vanden Broeck 1874 [nomen nudum]
Full reference: J. E. Gray. 1821. On the natural arrangement of vertebrose animals. The London Medical Repository Monthly Journal and Review 15:296-310
Parent taxon: Physeteroidea according to J. H. Geisler et al. 2011
Sister taxa: Acrophyseter, Brygmophyseter, Diaphorocetus, Eudelphis, Kogiidae, Livyatan, Orycterocetus, Placoziphius
Subtaxa: Aulophyseter, Aulophyseterinae, Ferecetotherium, Hoplocetinae, Idiophyseter, Kogiopsis, Physeter, Physeterinae, Physeterula, Scaldicetus
Ecology: aquatic piscivore-carnivore