Invalid subtaxa: Balaenoptera hubachi Dathe 1983 [invalid subgroup], Hadrosaurus tripos Cope 1869 [nomen dubium], Megaptera hubachi Dathe 1983 [invalid subgroup], Palaeocetidae Seeley 1865, Trachodon tripos Cope 1869 [nomen dubium]
Full reference: J. E. Gray. 1864. Notes on the Whalebone-Whales; with a Synopsis of the Species. The Annals and Magazine of Natural History 14:345-353
Parent taxon: Thalassotherii according to M. Bisconti et al. 2013
Sister taxa: Aglaocetus, Cetotheriidae, Diorocetus, Eschrichtiidae, Isanacetus, Isocetus, Parietobalaena, Pelocetus, Titanocetus, Cophocetus, Halicetus, Thinocetus, Uranocetus, Pinocetus
Subtaxa: Agaphelinae, Archaebalaenoptera, Balaenoptera, Balaenopterinae, Cetotheriophanes, Diunatans, Eschrichtiinae, Megaptera, Megapterinae, Notiocetus, Parabalaenoptera, Parabalaenopterinae, Plesiobalaenoptera, Plesiocetus, Praemegaptera, Praemegapterinae, Protororqualus, Pterobalaena, Rorqualus
Ecology: aquatic suspension feeder