List of extinct cetaceans

The list of extinct cetaceans features the extinct genera and species of the order Cetacea. The cetaceans (whales, dolphins and porpoises) are descendants of land-living mammals, the even-toed ungulates. The earliest cetaceans were still hoofed mammals. These early cetaceans became gradually better adapted for swimming than for walking on land, finally evolving into fully marine cetaceans.

This list currently includes only fossil genera and species. However, the Atlantic population of gray whales (Eschrichtius robustus) became extinct in the 18th century, and the baiji (or Chinese river dolphin, Lipotes vexillifer) was declared "functionally extinct" after an expedition in late 2006 failed to find any in the Yangtze River.

Suborder Archaeoceti

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Family Ambulocetidae

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(Eocene)

Dorudon

Family Basilosauridae

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(Late Eocene)

Basilosaurus cetoides reconstruction

Family Kekenodontidae

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(Oligocene)


Family Pakicetidae

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(Early to Middle Eocene)

Ambulocetus skeleton in front and Pakicetus behind

Family Protocetidae

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(Eocene)

Rhodocetus kasrani reconstruction

Family Remingtonocetidae

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(Eocene)

Suborder Mysticeti

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Family Llanocetidae

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(Late Eocene-Early Oligocene)

Family Mammalodontidae

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(jr synonym Janjucetidae)

Janjucetus hunderi

(Late Oligocene)

Family incertae sedis

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Clade Kinetomenta

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Family Aetiocetidae

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(Oligocene)

Aetiocetus restoration

Clade Chaeomysticeti

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Family incertae sedis
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Superfamily Eomysticetoidea

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Family Cetotheriopsidae
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(Oligocene to Miocene)

Family Eomysticetidae
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(Oligocene to early Miocene)

Family Aglaocetidae
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(Miocene)

Superfamily Balaenoidea

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Family Balaenidae
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(Miocene to Recent)

Family incertae sedis
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Clade Thalassotherii

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Family Cetotheriidae
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(Miocene - Pliocene)

Classification follows Steeman (2007) unless otherwise noted.[13]

Cetotherium restoration


Family Diorocetidae
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(Miocene to Pliocene)

Family Neobalaenidae
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(Miocene to Recent)

Family Pelocetidae
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(Miocene)

Family incertae sedis
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Superfamily Balaenopteroidea

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Eobalaenoptera skeleton
Family Balaenopteridae
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(Miocene to Recent)

Family Eschrichtiidae
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(Miocene to Recent)

Family Tranatocetidae
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Family incertae sedis
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Suborder Odontoceti

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Basal forms

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Family Agorophiidae

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(Early Oligocene)

Family Ashleycetidae

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(Early Oligocene)

Family Patriocetidae

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(Oligocene to Early Miocene)

Family Simocetidae

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(Early Oligocene)

Family Xenorophidae

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(Late Oligocene)

Family Inticetidae

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Family Microzeuglodontidae

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Family Squaloziphiidae

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(Late Oligocene to Early Miocene)

Family incertae sedis

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Superfamily Squalodontoidea

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Family Dalpiazinidae

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(Late Oligocene to Miocene)

Family Prosqualodontidae

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(Late Oligocene-Middle Miocene)

Superfamily Physeteroidea

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Family Kogiidae

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(Miocene to recent)

Family Physeteridae

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Family incertae sedis

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Superfamily "Eurhinodelphinoidea"

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Family Argyrocetidae

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(Late Oligocene to Early Miocene)

Family Eoplatanistidae

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(Miocene)

Family Eurhinodelphinidae

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(Late Oligocene to Late Miocene)

Macrodelphinus & Eurhinodelphis

Superfamily Platanistoidea

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Family Allodelphinidae

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(Late Oligocene to Middle Miocene)

Life reconstruction of Arktocara yakataga

Family Platanistidae

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(Early Miocene to Recent)

Family Squalodelphinidae

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(Late Oligocene to Middle Miocene)

Family Squalodontidae

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(Late Oligocene to Middle Miocene)

Family Waipatiidae

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(Late Oligocene to Early Miocene)

Superfamily Ziphioidea

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Family Ziphiidae

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(Miocene to Recent)

Clade Delphinida

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Family incertae sedis

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Superfamily Delphinoidea

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Family Albireonidae
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(Miocene to Pliocene)

Family Delphinidae
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Etruridelphis giulii

(Oligocene to Recent)

Family Kentriodontidae
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(Oligocene to Pliocene)

Kentriodon reconstruction
Family Monodontidae
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(Miocene to Recent)

Family Odobenocetopsidae
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(Late Miocene to Early Pliocene)

Odobenocetops reconstruction
Family Phocoenidae
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(Miocene to Recent)

Superfamily Inioidea

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Family Iniidae
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(Miocene to Recent)

Family Pontoporiidae
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(Middle Miocene to Recent)

Superfamily Lipotoidea

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Family Lipotidae
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(Late Miocene to Recent)

Superfamily incertae sedis

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Family incertae sedis
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See also

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References

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