Opinions from O. Abel 1905
- 'Acrodelphidae belongs to Odontoceti'
- 'Acrodelphinae belongs to Acrodelphidae'
- 'Acrodelphis belongs to Acrodelphinae'
- 'Acrodelphis macrospondylus belongs to Acrodelphis'
- 'Aporotus is a subjective synonym of Mioziphius'
- 'Aporotus affinis is a subjective synonym of Mioziphius belgicus'
- 'Aporotus recurvirostris is a subjective synonym of Mioziphius belgicus'
- 'Argyrocetinae belongs to Acrodelphidae'
- 'Argyrocetus belongs to Argyrocetinae'
- 'Balaenodon is a subjective synonym of Scaldicetus'
- 'Balaenodon physaloides is a subjective synonym of Scaldicetus caretti'
- 'Belemnoziphius is a subjective synonym of Choneziphius'
- 'Belemnoziphius compressus is a subjective synonym of Mesoplodon longirostris'
- 'Belemnoziphius prorops is a subjective synonym of Mesoplodon longirostris'
- 'Belemnoziphius recurvus is a subjective synonym of Mesoplodon longirostris'
- 'Beluga belongs to Beluginae'
- 'Beluginae belongs to Acrodelphidae'
- 'Cetorhynchus atavus belongs to Cetorhynchus'
- 'Champsodelphis belongs to Argyrocetinae'
- 'Champsodelphis cristatus is a subjective synonym of Acrodelphis denticulatus'
- 'Champsodelphis denticulatus belongs to Champsodelphis' according to J. Probst 1886
- 'Champsodelphis denticulatus is recombined as Acrodelphis denticulatus'
- 'Champsodelphis scaldensis belongs to Champsodelphis' according to B. du Bus 1873
- 'Champsodelphis scaldensis is recombined as Palaeoziphius scaldensis'
- 'Choneziphius belongs to Ziphiidae'
- 'Choneziphius liops is a subjective synonym of Choneziphius planirostris'
- 'Choneziphius packardi is a subjective synonym of Choneziphius planirostris'
- 'Choneziphius trachops is a subjective synonym of Choneziphius planirostris'
- 'Cyrtodelphis belongs to Argyrocetinae'
- 'Delphinidae belongs to Odontoceti'
- 'Delphininae belongs to Delphinidae'
- 'Delphinus acutidens is a subjective synonym of Physeterula dubusii'
- 'Delphinus bordae is recombined as Squalodon bordae'
- 'Delphinus sulcatus is recombined as Cyrtodelphis sulcatus'
- 'Dinoziphius is a nomen nudum'
- 'Dinoziphius carolinensis is a subjective synonym of Scaldicetus caretti'
- 'Dioplodon is a subjective synonym of Mioziphius'
- 'Dioplodon becanii is a subjective synonym of Mesoplodon longirostris'
- 'Dioplodon bononiensis is a subjective synonym of Mesoplodon longirostris'
- 'Dioplodon danconae is a subjective synonym of Mesoplodon longirostris'
- 'Dioplodon farnesinae is a subjective synonym of Mesoplodon longirostris'
- 'Dioplodon hemixem is replaced by Mioziphius belgicus'
- 'Dioplodon lawley is a subjective synonym of Mesoplodon longirostris'
- 'Mesoplodon meneghinii is a subjective synonym of Mesoplodon longirostris'
- 'Mesoplodon senensis is a subjective synonym of Mesoplodon longirostris'
- 'Eboroziphius is a subjective synonym of Choneziphius'
- 'Eboroziphius coelops is a subjective synonym of Choneziphius planirostris'
- 'Eucetus is a subjective synonym of Scaldicetus'
- 'Eucetus amblyodon is a subjective synonym of Scaldicetus caretti'
- 'Eudelphis is a subjective synonym of Scaldicetus'
- 'Eudelphis mortezelensis [misspelled as Scaldicetus mortselensis] belongs to Scaldicetus'
- 'Eurhinodelphidae belongs to Odontoceti'
- 'Eurhinodelphis belongs to Eurhinodelphidae'
- 'Eurhinodelphis cocheteuxi belongs to Eurhinodelphis'
- 'Eurhinodelphis longirostris belongs to Eurhinodelphis'
- 'Heterodelphis belongs to Acrodelphinae'
- 'Homaeocetus is a subjective synonym of Scaldicetus'
- 'Homaeocetus villersii is a subjective synonym of Scaldicetus caretti'
- 'Hoplocetus is a subjective synonym of Scaldicetus'
- 'Hoplocetus borgerhoutensis is a subjective synonym of Scaldicetus caretti'
- 'Hoplocetus crassidens is a subjective synonym of Scaldicetus caretti'
- 'Hoplocetus curvidens is a subjective synonym of Scaldicetus caretti'
- 'Hoplocetus obesus is a subjective synonym of Scaldicetus caretti'
- 'Inia belongs to Iniinae'
- 'Iniinae belongs to Acrodelphidae'
- 'Ischyrorhynchus belongs to Argyrocetinae'
- 'Mesoplodon belongs to Ziphiidae'
- 'Mesoplodon (Cetorhynchus) was reranked as Cetorhynchus and belongs to Ziphiidae'
- 'Mesoplodon floris is a subjective synonym of Mesoplodon longirostris'
- 'Mesoplodon scaphoides is a subjective synonym of Mesoplodon longirostris'
- 'Microsqualodon belongs to Squalodontidae'
- 'Mioziphius belongs to Ziphiidae'
- 'Mioziphius belgicus belongs to Mioziphius'
- 'Monodon belongs to Beluginae'
- 'Orcopsis is a subjective synonym of Physeterula'
- 'Palaeodelphis is a subjective synonym of Scaldicetus'
- 'Palaeodelphis annulatus is a subjective synonym of Scaldicetus grandis'
- 'Palaeodelphis arcuatus is a subjective synonym of Scaldicetus caretti'
- 'Palaeodelphis coronatus is a subjective synonym of Scaldicetus grandis'
- 'Palaeodelphis fusiformis is a subjective synonym of Scaldicetus caretti'
- 'Palaeodelphis grandis is recombined as Scaldicetus grandis'
- 'Palaeodelphis minutus is a subjective synonym of Scaldicetus grandis'
- 'Palaeodelphis pachyodon is a subjective synonym of Scaldicetus caretti'
- 'Palaeodelphis zonatus is a subjective synonym of Scaldicetus caretti'
- 'Palaeoziphius belongs to Ziphiidae'
- 'Phocaenopsis cornutus is recombined as Pithanodelphis cornutus'
- 'Phocaenopsis scheynensis is recombined as Acrodelphis scheynensis'
- 'Phocoeninae [misspelled as Phocaeninae] belongs to Delphinidae'
- 'Physeteridae belongs to Odontoceti'
- 'Physeterula belongs to Physeteridae'
- 'Physodon is a subjective synonym of Scaldicetus'
- 'Physodon lorteti is a subjective synonym of Scaldicetus grandis'
- 'Pithanodelphis belongs to Delphininae'
- 'Placoziphius belongs to Physeteridae'
- 'Placoziphius duboisii belongs to Placoziphius'
- 'Platydelphis is a nomen dubium'
- 'Pontistes belongs to Iniinae'
- 'Pontivaga belongs to Argyrocetinae'
- 'Pontoporia belongs to Iniinae'
- 'Priscodelphinus cristatus is recombined as Eurhinodelphis cristatus'
- 'Prophyseter belongs to Physeteridae'
- 'Prophyseter dolloi belongs to Prophyseter'
- 'Proroziphius chonops is a subjective synonym of Mesoplodon longirostris'
- 'Proroziphius macrops is a subjective synonym of Mesoplodon longirostris'
- 'Protophocaena belongs to Phocaeninae'
- 'Protophocaena minima belongs to Protophocaena'
- 'Rhinostodes is a subjective synonym of Mesoplodon'
- 'Rhinostodes antwerpiensis is a subjective synonym of Mesoplodon longirostris'
- 'Scaldicetus belongs to Physeteridae'
- 'Scaldicetus antwerpiensis is a subjective synonym of Scaldicetus caretti'
- 'Scaldicetus caretti belongs to Scaldicetus'
- 'Squalodon belongs to Squalodontidae'
- 'Squalodon antverpiensis is corrected as Squalodon antwerpiensis and belongs to Squalodon'
- 'Squalodon gastaldii is recombined as Microsqualodon gastaldii'
- 'Squalodontidae belongs to Odontoceti'
- 'Synostodon is a subjective synonym of Mioziphius'
- 'Thalassocetus belongs to Physeteridae'
- 'Thalassocetus antwerpiensis belongs to Thalassocetus'
- 'Trispondylus is a nomen dubium'
- 'Trispondylus kleini is a nomen dubium'
- 'Ziphiidae was reranked as the tribe Ziphiina and belongs to Odontoceti'
- 'Ziphiopsis is a subjective synonym of Mioziphius'
- 'Ziphiopsis phymatodes is a subjective synonym of Choneziphius planirostris'
- 'Ziphirostre is a subjective synonym of Mioziphius'
- 'Ziphirostrum is a subjective synonym of Mioziphius'
- 'Ziphirostrum gracile is a subjective synonym of Mioziphius belgicus'
- 'Ziphirostrum laevigatum is a subjective synonym of Mioziphius belgicus'
- 'Ziphirostrum marginatum is a subjective synonym of Mioziphius belgicus'
- 'Ziphirostrum tumidum is a subjective synonym of Mioziphius belgicus'
- 'Ziphirostrum turninense is a subjective synonym of Mioziphius belgicus'
- 'Ziphius angulatus is a subjective synonym of Mesoplodon longirostris'
- 'Ziphius angustus is a subjective synonym of Mesoplodon longirostris'
- 'Ziphius cuvieri is a subjective synonym of Choneziphius planirostris'
- 'Ziphius gibbus is a subjective synonym of Mesoplodon longirostris'
- 'Ziphius longirostris is recombined as Mesoplodon longirostris'
- 'Mesoplodon medilineatus is a subjective synonym of Mesoplodon longirostris'
- 'Ziphius planirostris is recombined as Choneziphius planirostris'
- 'Ziphius planus is a subjective synonym of Choneziphius planirostris'
- 'Ziphius tenuirostris is a subjective synonym of Mesoplodon longirostris'