Opinions from R. Lydekker 1887
- 'Amphicetus is a subjective synonym of Cetotherium'
- 'Aporotus is a subjective synonym of Choneziphius'
- 'Archaeoceti belongs to Cetacea'
- 'Arionus is a subjective synonym of Squalodon'
- 'Balaena belongs to Balaeninae'
- 'Balaena affinis belongs to Balaena'
- 'Balaena balaenopsis belongs to Balaena'
- 'Balaena biscayensis belongs to Balaena'
- 'Balaena definata is recombined as Balaenoptera definata'
- 'Balaena emarginata is recombined as Balaenoptera emarginata'
- 'Balaena mysticetus belongs to Balaena'
- 'Balaena primigenius [misspelled as Balaena primigenia] belongs to Balaena'
- 'Balaeninae belongs to Balaenidae'
- 'Balaenodon belongs to Physeterinae'
- 'Balaenodon physaloides belongs to Balaenodon'
- 'Balaenoptera belongs to Balaenopterinae'
- 'Balaenoptera borealina belongs to Balaenoptera'
- 'Balaenoptera borealis belongs to Balaenoptera'
- 'Balaenoptera juddi belongs to Balaenoptera'
- 'Balaenoptera sibbaldina is a subjective synonym of Balaenoptera definata'
- 'Balaenopterinae belongs to Balaenidae'
- 'Balaenotus insignis is recombined as Balaena insignis'
- 'Balanadae is corrected as Balaenidae and belongs to Mystacoceti'
- 'Belemnoziphius is a subjective synonym of Mesoplodon'
- 'Belemnoziphius compressus is recombined as Mesoplodon compressus'
- 'Burtinopsis is a subjective synonym of Megaptera'
- 'Burtinopsis minutus is recombined as Megaptera minuta'
- 'Burtinopsis similis is recombined as Megaptera similis'
- 'Cetotherium belongs to Balaenopterinae'
- 'Cetotheriophanes is a subjective synonym of Cetotherium'
- 'Eucetotherium is a subjective synonym of Cetotherium'
- 'Plesiocetopsis is a subjective synonym of Cetotherium'
- 'Cetotherium brevifrons belongs to Cetotherium'
- 'Cetotherium dubium belongs to Cetotherium'
- 'Champsodelphis belongs to Platanistidae'
- 'Chirotherium is a subjective synonym of Halitherium'
- 'Choneziphius belongs to Ziphiinae'
- 'Crenidelphinus is a subjective synonym of Squalodon'
- 'Delphinapterus belongs to Delphinidae'
- 'Delphinidae belongs to Odontoceti'
- 'Delphinodon is a subjective synonym of Squalodon'
- 'Delphinoides is a subjective synonym of Squalodon'
- 'Delphinus orcoides is a subjective synonym of Globicephalus uncidens'
- 'Delphinus (Phocaena) uncidens is recombined as Globicephalus uncidens'
- 'Delphinus brocchi is recombined as Delphinapterus brochii'
- 'Delphinus leucas is recombined as Delphinapterus leucas'
- 'Delphinus melas is recombined as Globicephalus melas'
- 'Delphinus pseudodelphis is a subjective synonym of Schizodelphis sulcatus'
- 'Delphinus sulcatus is recombined as Schizodelphis sulcatus'
- 'Dinoziphius ramdoncki is a subjective synonym of Eucetus amblyodon'
- 'Dioplodon is a subjective synonym of Mesoplodon'
- 'Dioplodon becani is a subjective synonym of Mesoplodon longirostris'
- 'Eotherium belongs to Halitheriidae'
- 'Eotherium aegyptiacum belongs to Eotherium'
- 'Eucetus belongs to Physeterinae'
- 'Eucetus amblyodon belongs to Eucetus'
- 'Felsinotherium is a subjective synonym of Halitherium'
- 'Felsinotherium forestii is recombined as Halitherium forestii'
- 'Globicephala [misspelled as Globicephalus] belongs to Delphinidae'
- 'Globiceps is a subjective synonym of Globicephalus'
- 'Halianassa is a subjective synonym of Halitherium'
- 'Halitheriidae belongs to Sirenia'
- 'Halitherium belongs to Halitheriidae'
- 'Halitherium canhami belongs to Halitherium'
- 'Herpetocetus belongs to Balaenopterinae'
- 'Herpetocetus scaldiensis belongs to Herpetocetus'
- 'Heterocetus is a subjective synonym of Cetotherium'
- 'Heterocetus affinis is recombined as Cetotherium affine'
- 'Hoplocetus belongs to Physeterinae'
- 'Hoplocetus borgerhoutensis belongs to Hoplocetus'
- 'Hoplocetus crassidens belongs to Hoplocetus'
- 'Hoplocetus curvidens belongs to Hoplocetus'
- 'Hyperoodon belongs to Ziphiinae'
- 'Hyperoodon rostratum [misspelled as Hyperoodon rostratus] belongs to Hyperoodon'
- 'Macrophoca is a subjective synonym of Squalodon'
- 'Macrophoca atlantica is recombined as Squalodon atlanticus'
- 'Manati gigas is recombined as Rhytina gigas'
- 'Manatus coulombi is a subjective synonym of Eotherium aegyptiacum'
- 'Manatus fossilis is recombined as Halitherium fossile'
- 'Megaptera belongs to Balaenopterinae'
- 'Megapteropsis is a subjective synonym of Megaptera'
- 'Megapteropsis robusta is replaced by Megaptera affinis'
- 'Mesoplodon belongs to Ziphiinae'
- 'Metaxytherium is a subjective synonym of Halitherium'
- 'Monodon belongs to Delphinidae'
- 'Monodon monoceros belongs to Monodon'
- 'Mystacoceti belongs to Cetacea'
- 'Odontoceti belongs to Cetacea'
- 'Orca belongs to Delphinidae'
- 'Orca citoniensis belongs to Orca'
- 'Pachyodon is a subjective synonym of Squalodon'
- 'Pachyodon catulli is recombined as Squalodon catulli'
- 'Palaeocetus belongs to Balaeninae'
- 'Palaeocetus sedgwicki is corrected as Palaeocetus sedgwickii and belongs to Palaeocetus'
- 'Palaeodelphis is a subjective synonym of Physodon'
- 'Palaeodelphis fusiformis is recombined as Physodon fusiformis'
- 'Palaeodelphis grandis is recombined as Physodon grandis'
- 'Phocodon is a subjective synonym of Squalodon'
- 'Physeter belongs to Physeterinae'
- 'Physeter macrocephalus belongs to Physeter'
- 'Physeteridae belongs to Odontoceti'
- 'Physeterinae belongs to Physeteridae'
- 'Physeterula belongs to Physeterinae'
- 'Physeterula dubusii is corrected as Physeterula dubusi and belongs to Physeterula'
- 'Physetodon belongs to Physeterinae'
- 'Physetodon baileyi belongs to Physetodon'
- 'Physodon belongs to Physeterinae'
- 'Platanistina was reranked as the family Platanistidae and belongs to Odontoceti'
- 'Plesiocetus is a subjective synonym of Cetotherium'
- 'Plesiocetus brialmonti is recombined as Cetotherium brialmonti'
- 'Plesiocetus burtinii is recombined as Cetotherium burtini'
- 'Plesiocetus garopii is recombined as Balaenoptera goropi'
- 'Plesiocetus hupschii is recombined as Cetotherium hupschi'
- 'Prorastomus belongs to Halitheriidae'
- 'Prorastomus sirenoides belongs to Prorastomus'
- 'Pugmeodon is a subjective synonym of Halitherium'
- 'Pugmeodon schinzii is recombined as Halitherium schinzi'
- 'Rhizoprion is a subjective synonym of Squalodon'
- 'Rhytina belongs to Rhytinidae'
- 'Rhytinidae belongs to Sirenia'
- 'Sastrilophus dehmi is a nomen dubium'
- 'Scaldicetus belongs to Physeterinae'
- 'Scaldicetus caretti [misspelled as Scaldicetus careti] belongs to Scaldicetus'
- 'Schizodelphis belongs to Platanistidae'
- 'Squalodon belongs to Squalodontidae'
- 'Squalodon grateloupii [misspelled as Squalodon grateloupi] belongs to Squalodon'
- 'Squalodontidae belongs to Odontoceti'
- 'Stereodelphis is a subjective synonym of Squalodon'
- 'Tursiops belongs to Delphinidae'
- 'Tursiops tursio belongs to Tursiops'
- 'Zeuglodon belongs to Zeuglodontidae'
- 'Zeuglodon brachyspondylus is a subjective synonym of Zeuglodon cetoides'
- 'Zeuglodon cetoides belongs to Zeuglodon'
- 'Zeuglodon hydrarchus is a subjective synonym of Zeuglodon cetoides'
- 'Zeuglodon macrospondylus is a subjective synonym of Zeuglodon cetoides'
- 'Zeuglodontidae belongs to Archaeoceti'
- 'Ziphiidae was reranked as the tribe Ziphiina and belongs to Physeteridae'
- 'Ziphiopsis is a subjective synonym of Choneziphius'
- 'Ziphirostrum is a subjective synonym of Choneziphius'
- 'Ziphius angulatus is recombined as Mesoplodon angulatus'
- 'Ziphius angustus is recombined as Mesoplodon angustus'
- 'Ziphius gibbus is recombined as Mesoplodon gibbus'
- 'Ziphius longirostris is recombined as Mesoplodon longirostris'
- 'Ziphius medilineatus is a subjective synonym of Mesoplodon longirostris'
- 'Ziphius planirostris is recombined as Choneziphius planirostris'
- 'Ziphius planus is recombined as Choneziphius planus'
- 'Ziphius tenuirostris is recombined as Mesoplodon tenuirostris'