Superregnum: Eukaryota
Cladus: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Classis: Mammalia
Subclassis: Theria
Infraclassis: Placentalia
Superordo: Cetartiodactyla
Ordo: Cetacea
Subordo: Odontoceti
Infraordines: Physeterida
Superfamiliae: Physeteroidea
Familia: incertae sedis
Genera: †Acrophyseter - †Diaphorocetus - †Zygophyseter
References
* Bianucci, G.; Landini, W. 2006: Killer sperm whale: a new basal physeteroid (Mammalia, Cetacea) from the Late Miocene of Italy. Zoological journal of the Linnean Society, 148: 103-131. doi: 10.1111/j.1096-3642.2006.00228.x
* Lambert, O.; Bianucci, G.; Muizon, C. de 2008: A new stem-sperm whale (Cetacea, Odontoceti, Physeteroidea) from the Latest Miocene of Peru. Comptes Rendus Palevol, 7: 361-369. doi: 10.1016/j.crpv.2008.06.002
* Uhen, M. D., Fordyce, R. E., & Barnes, L. G.. 2008; "Odontoceti" In Janis, C. M., Scott, K. M., & Jacobs, L. L.(eds.), "Evolution of Tertiary Mammals of North America" II:566-606
