Orcininae is a contested subfamily of oceanic dolphins composed of 1 living and 3 extinct genera. It may be superseded by

Delphinidae Oceanic dolphins or Delphinidae are a widely distributed family of dolphins that live in the sea. Close to forty extant species are recognised. They include several big species whose common names contain "whale" rather than "dolphin", such as the ...

. Its only extant member is the

orca The orca or killer whale (''Orcinus orca'') is a toothed whale belonging to the oceanic dolphin family, of which it is the largest member. It is the only Extant taxon, extant species in the genus ''Orcinus'' and is recognizable by its black ...

(''Orcinus orca''); all other extant genera formerly classified in it have been moved out. Orcininae is thought to be one of the most basal members of Delphinidae, with only the

Atlantic white-sided dolphin The Atlantic white-sided dolphin (''Lagenorhynchus acutus'') is a distinctively coloured dolphin found in the cool to temperate waters of the North Atlantic Ocean. Description The dolphin is slightly larger than most other oceanic dolphins. It ...

(''Lagenorhynchus acutus'') being more basal.

Classification

*'' Arimidelphis'' † **''Arimidelphis sorbinii'' † *''

Hemisyntrachelus ''Hemisyntrachelus'' is an extinct genus of cetacean.''Hemisyntrachelus''
at ...

'' † **''Hemisyntrachelus cortesii'' **''Hemisyntrachelus pisanus'' *''

Orcinus ''Orcinus'' is a genus of Delphinidae, the family of carnivorous marine mammals known as dolphins. It includes the largest delphinid species, ''Orcinus orca'', known as the orca or killer whale. Two extinct species are recognised, '' Orcinus pale ...

'' **''

Orcinus citoniensis ''Orcinus citoniensis'' is an extinct species of killer whale identified in the Late Pliocene of Italy and the Early Pleistocene of England. It was smaller than the modern killer whale (''O. orca''), versus , and had around 8 more teeth in its ...

'' † **''

Orcinus meyeri ''Orcinus meyeri'' is a fossil species of ''Orcinus'' (killer whales) found in the Early Miocene deposits of southern Germany, known from two jaw fragments and 18 isolated teeth. It was originally described as ''Delphinus acutidens'' in 1859, bu ...

'' † **''

Orcinus orca The orca or killer whale (''Orcinus orca'') is a toothed whale belonging to the oceanic dolphin family, of which it is the largest member. It is the only extant species in the genus ''Orcinus'' and is recognizable by its black-and-white pat ...

'' **''

Orcinus paleorca ''Orcinus paleorca'' is a fossil species of ''Orcinus'', the genus of killer whales (orca), dated to the Middle Pleistocene. The only known specimen is a tooth fragment discovered in Honshu, Japan. Taxonomy The holotype specimen, a tooth fragmen ...

'' † *'' Platalearostrum'' † **''Platalearostrum hoekmani'' †

References

{{Taxonbar, from=Q1757612 Mammal subfamilies Oceanic dolphins