PaleoDB taxon number: 42936
Synonyms: Hydrarchidae Bonaparte 1850 (no. 63149), Hydrarchina Bonaparte 1850 (no. 96681), Prozeuglodontidae Moustafa 1954 (no. 191807), Stegorhinidae Brandt 1873 (no. 63150), Zeuglodontae Bonaparte 1849 (no. 147846), Zeuglodontidae Bonaparte 1849 (no. 63148)
Full reference: E. D. Cope. 1867. 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. Martínez-Cáceres et al. 2017
Sister taxa: Metasqualodon harwoodi, Neoceti
Subtaxa: Ancalecetus, Balaenoptera juddi, Basilosaurinae, Basilosaurus, Basiloterus, Basilotritus, Berardiopsis miocaenus, Chrysocetus, Cynthiacetus, Dorudon, Dorudontinae, Masracetus, Ocucajea, Platyosphys, Pontogeneus, Pontogeneus brachyspondylus, Saghacetus, Stromeriinae, Stromerius, Supayacetus, Zygorhiza
Ecology: ground dwelling grazer-browser