Delphinoidea are the largest group of toothed whales, including 66 genera in 6 families. The largest living member of the superfamily is the orca, which can reach 6 tons, while the smallest is the vaquita.

Taxonomy

Delphinoidea is a very diverse clade. It includes all extant oceanic dolphins, as well as various extinct species, like the unique Odobenocetops. The three extant families within Delphinoidea are Delphinidae (oceanic dolphins), Monodontidae (beluga and narwhal) and Phocoenidae (porpoises).

Based on McGowen et al., 2019

Family †Albireonidae Genus Albireo

Family Delphinidae Subfamily Delphininae Genus Delphinus Genus Lagenodelphis Genus Sotalia Genus Sousa Genus Stenella Genus Tursiops Subfamily Globicephalinae Genus †Astadelphis Genus Feresa Genus Globicephala Genus Grampus Genus Orcaella Genus Peponocephala Genus Pseudorca Genus Steno Subfamily Lissodelphininae Genus Cephalorhynchus Genus Lissodelphis Subfamily Orcininae Genus †Arimidelphis Genus †Eodelphinus Genus †Hemisyntrachelus Genus Orcinus Subfamily incertae sedis Genus †Australodelphis Genus †Etruridelphis Genus Lagenorhynchus Genus †Sinanodelphis

Family †Kentriodontidae Subfamily Kentriodontinae Genus Belonodelphis Genus Delphinodon Genus Heterodelphis Genus Incacetus? Genus Kentriodon Genus Lamprolithax Genus Loxolithax Genus Macrokentriodon Genus Microphocaena Genus Rudicetus Genus Tagicetus Subfamily Lophocetinae Genus Hadrodelphis Genus Liolithax Genus Lophocetus Genus Platyvercus Subfamily Pithanodelphininae? Genus Atocetus? Genus Leptodelphis? Genus Pithanodelphis? Genus Sarmatodelphis? Genus Sophianacetus? Subfamily Kampholophinae? Genus Kampholophos?

Family Monodontidae Subfamily Delphinapterinae Genus †Bohaskaia Genus Delphinapterus Genus † Denebola Subfamily Monodontinae Genus Monodon

Family † Odobenocetopsidae Genus Odobenocetops

Family Phocoenidae Genus †Archaeophocaena Genus †Australithax Genus †Brabocetus Genus †Haborophocoena Genus †Lomacetus Genus †Miophocaena Genus Neophocaena Genus †Numataphocoena Genus Phocoena Genus Phocoenoides Genus †Piscolithax Genus †Pterophocaena Genus †Salumiphocaena Genus †Semirostrum Genus †Septemtriocetus

Familia incertae sedis Genus †Graamocetus Genus †Miodelphis Genus †Nannolithax Genus †Oedolithax Genus †Palaeophocaena Genus †Platylithax Genus †Protodelphinus