Opinions from R. Kellogg 1936
- 'Alabamornis is a subjective synonym of Basilosaurus'
- 'Alabamornis gigantea is a subjective synonym of Basilosaurus cetoides'
- 'Archaeoceti belongs to Cetacea'
- 'Balaenoptera juddi belongs to Balaenoptera' according to Seeley 1881
- 'Balaenoptera juddi is recombined as Zygorhiza juddi'
- 'Basilosauridae belongs to Archaeoceti'
- 'Basilosaurus belongs to Basilosauridae'
- 'Basilosaurus kochii is recombined as Zygorhiza kochii'
- 'Dorudon belongs to Dorudontidae'
- 'Dorudon serratus belongs to Dorudon'
- 'Dorudontidae belongs to Archaeoceti'
- 'Eocetus belongs to Protocetidae'
- 'Hydrarchidae is a subjective synonym of Basilosauridae'
- 'Hydrarchos is a subjective synonym of Basilosaurus'
- 'Hydrarchos harlani is a subjective synonym of Basilosaurus cetoides'
- 'Hydrarchos sillimani belongs to Hydrarchos' according to Wyman 1845
- 'Hydrarchos sillimani is a subjective synonym of Basilosaurus cetoides'
- 'Hydrarchus is a subjective synonym of Basilosaurus'
- 'Hydrargos is a subjective synonym of Basilosaurus'
- 'Hydrargos sillimanii is a subjective synonym of Basilosaurus cetoides'
- 'Hydrothereuta is an objective synonym of Archaeoceti'
- 'Kekenodon belongs to Dorudontidae'
- 'Kekenodon onamata belongs to Kekenodon'
- 'Mesocetus is an objective synonym of Eocetus'
- 'Pappocetus belongs to Protocetidae'
- 'Phococetus belongs to Dorudontidae'
- 'Platyosphys belongs to Basilosauridae'
- 'Pontobasileus belongs to Archaeoceti'
- 'Pontobasileus tuberculatus belongs to Pontobasileus'
- 'Pontogeneus belongs to Archaeoceti'
- 'Pontogeneus priscus is a subjective synonym of Pontogeneus brachyspondylus'
- 'Protocetidae belongs to Archaeoceti'
- 'Protocetus belongs to Protocetidae'
- 'Prozeuglodon belongs to Basilosauridae'
- 'Prozeuglodon atrox is a subjective synonym of Prozeuglodon isis'
- 'Prozeuglodon stromeri is recombined as Dorudon stromeri'
- 'Stegorhinidae is a subjective synonym of Basilosauridae'
- 'Zeuglodon is an objective synonym of Basilosaurus'
- 'Zeuglodon brachyspondylum is a subjective synonym of Zygorhiza kochii'
- 'Zeuglodon brachyspondylus is recombined as Pontogeneus brachyspondylus'
- 'Zeuglodon trachyspondylus is a misspelling of Zeuglodon brachyspondylus'
- 'Zygorhiza minor is an objective synonym of Zygorhiza kochii'
- 'Zeuglodon ceti is an objective synonym of Basilosaurus cetoides'
- 'Zeuglodon cetoides is recombined as Basilosaurus cetoides'
- 'Zeuglodon elliotsmithii is recombined as Dorudon elliotsmithii'
- 'Zeuglodon harlani is a subjective synonym of Basilosaurus cetoides'
- 'Zeuglodon hydrarchus is a subjective synonym of Zygorhiza kochii'
- 'Zeuglodon intermedius is recombined as Dorudon intermedius'
- 'Zeuglodon isis is recombined as Prozeuglodon isis'
- 'Zeuglodon macrospondylus is a subjective synonym of Basilosaurus cetoides'
- 'Zeuglodon osiris is recombined as Dorudon osiris'
- 'Zeuglodon paulsonii is recombined as Platyosphys paulsonii'
- 'Zeuglodon puschii is a nomen dubium'
- 'Zeuglodon rossicus is a subjective synonym of Platyosphys paulsonii'
- 'Zeuglodon sensitivus is recombined as Dorudon sensitivus'
- 'Zeuglodon vasconum is recombined as Phococetus vasconum'
- 'Zeuglodon vredense is a nomen nudum'
- 'Zeuglodon wanklyni is recombined as Zygorhiza wanklyni'
- 'Zeuglodon zitteli is recombined as Dorudon zitteli'
- 'Zeuglodontia is a subjective synonym of Archaeoceti'
- 'Zeuglodontidae is a subjective synonym of Basilosauridae'
- 'Zugodon is a subjective synonym of Basilosaurus'
- 'Zygodon is a subjective synonym of Basilosaurus'
- 'Zygorhiza belongs to Dorudontidae'
- 'Zygorhiza brachyspondylus is a subjective synonym of Zygorhiza kochii'