Odontaspis americanus – synonym of Eugomphodus taurus
Odontaspis herbsti – synonym of Odontaspis ferox
Odontaspis madagascariensis – synonym of Negaprion acutidens
Odontaspis nasutus – synonym of Mitsukurina owstoni
Odontaspis platensis – synonym of Eugomphodus taurus
Odontaspis taurus – synonym of Eugomphodus taurus
Orectolobus devisi – synonym of Orectolobus ornatus
Orectolobus ogilbyi – synonym of Eucrossorhinus dasypogon
Orectolobus ornatus halei – synonym of Orectolobus ornatus
Orectolobus tentaculatus – synonym of Sutorectus tentaculatus
otidanus vulgaris – synonym of Hexanchus griseus
Oxyrhina daekyi – synonym of Lamna nasus
Oxyrhina glauca – synonym of Isurus oxyrinchus
Oxyrhina gomphodon – synonym of Isurus oxyrinchus