Invalid subtaxa: Basilosaurinae Miller 1923 [invalid subgroup], Basilosaurus paulsoni Brandt 1873 [nomen dubium], Basiloterus Gingerich et al. 1997 [nomen dubium], Berardiopsis miocaenus Koch 1899 [nomen dubium], Dorudontidae Miller 1923 [invalid subgroup], Dorudontinae Miller 1923 [invalid subgroup], Hydrarchidae Bonaparte 1850, Hydrarchina Bonaparte 1850, Platyosphys paulsoni Brandt 1873 [nomen dubium], Platyosphys paulsonii Brandt 1873 [nomen dubium], Pontogeneus Leidy 1852 [nomen nudum], Prozeuglodontidae Moustafa 1954, Stegorhinidae Brandt 1873, Zeuglodon paulsonii Brandt 1873 [nomen dubium], Zeuglodontae Bonaparte 1849, Zeuglodontidae Bonaparte 1849
Full reference: E. D. Cope. 1868. An addition to the vertebrate fauna of the Miocene period, with a synopsis of the extinct Cetacea of the United States. Proceedings of the Academy of Natural Sciences of Philadelphia 19(4):138-157
Parent taxon: Pelagiceti according to M. Martinez-Cacers and C. Muizon 2011
Sister taxon: Neoceti
Subtaxa: Ancalecetus, Basilosaurus, Basiloterus hussaini, Basilotritus, Chrysocetus, Cynthiacetus, Dorudon, Masracetus, Ocucajea, Saghacetus, Stromeriinae, Stromerius, Supayacetus, Zygorhiza
Ecology: aquatic carnivore