# 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
### Family Ambulocetidae

(Eocene)
* Ambulocetus
* Himalayacetus
* Gandakasia

### Family Basilosauridae

(Late Eocene)
   * Tutcetus
   * Perucetus
* Basilosaurinae
** Basilosaurus
** Basiloterus
** Eocetus
* Pachycetinae
** Antaecetus
** Pachycetus
* Dorudontinae
** Ancalecetus
** Chrysocetus
** Cynthiacetus
** Dorudon
** Masracetus
** Ocucajea
** Saghacetus
** Supayacetus
** Zygorhiza
** Stromerius

### Family Kekenodontidae

(Oligocene)
* Kekenodon
* Tohoraonepu

### Family Pakicetidae

(Early to Middle Eocene)
* Gandakasia
* Pakicetus
* Nalacetus
* Ichthyolestes

### Family Protocetidae

(Eocene)
* Georgiacetinae
** Aegicetus
** Babiacetus
** Carolinacetus
** Georgiacetus
** NatchitochiaMaiacetus skeleton
** Pappocetus
** Pontobasileus
** Tupelocetus
* Makaracetinae
** Makaracetus
* Protocetinae
** Aegyptocetus
** Artiocetus
** Crenatocetus
** Dhedacetus
** Gaviacetus
** IndocetusKutchicetus minimus reconstruction
** Kharodacetus
** Maiacetus
** Peregocetus
** Protocetus
** Qaisracetus
** Rodhocetus
** Takracetus
** Togocetus

### Family Remingtonocetidae

(Eocene)
* Andrewsiphius
* Attockicetus
* Dalanistes
* Kutchicetus
* Rayanistes
* Remingtonocetus

## Suborder Mysticeti
### Family Llanocetidae

(Late Eocene-Early Oligocene)
* Llanocetus
* Mystacodon

### Family Mammalodontidae

(jr synonym Janjucetidae)
(Late Oligocene)
* Janjucetus
* Mammalodon

### Family incertae sedis

* Borealodon
* Coronodon

### Family Aetiocetidae

(Oligocene)
* Aetiocetus
* Ashorocetus
* Chonecetus
* Fucaia
* Morawanocetus
* Niparajacetus
* Salishicetus
* Willungacetus

#### Clade Chaeomysticeti

* Atlanticetus

##### Family incertae sedis

* Horopeta
* Maiabalaena
* Sitsqwayk
* Tlaxcallicetus
* Toipahautea
* Whakakai

#### Superfamily Eomysticetoidea
##### Family Cetotheriopsidae

(Oligocene to Miocene)
* Cetotheriopsis

##### Family Eomysticetidae

(Oligocene to early Miocene)
* Echericetus
* Eomysticetus
* Matapanui
* Micromysticetus
* Tohoraata
* Tokarahia
* Waharoa
* Yamatocetus

##### Family Aglaocetidae

(Miocene)
* Aglaocetus

#### Superfamily Balaenoidea
##### Family Balaenidae

(Miocene to Recent)
* Antwerpibalaena
* Archaeobalaena
* Balaena
** Balaena affinis
** Balaena arcuata
** Balaena larteti
** Balaena macrocephalus
** Balaena montalionis
** Balaena ricei
* Balaenella
* Balaenotus
* Balaenula
* Charadrobalaena
* Eubalaena (extant)
** Eubalaena ianitrix
** Eubalaena shinshuensis
* Idiocetus
* Peripolocetus
* Protobalaena

##### Family incertae sedis

* Morenocetus

#### Clade Thalassotherii

* Cetotheriomorphus
* Heterocetus
* Imerocetus
* Isocetus
* Notiocetus
* Otradnocetus
* Palaeobalaena
* Rhegnopsis

##### Family Cetotheriidae

(Miocene - Pliocene)
Classification follows Steeman (2007) unless otherwise noted.
* Adicetus
* Brandtocetus
* Cephalotropis
* Cetotherium
* Ciuciulea
* Eucetotherium
* Halicetus
* Herentalia
* Herpetocetus
* Hibacetus
* Joumocetus
* Kurdalagonus
* Metopocetus
* Mithridatocetus
* NannocetusParietobalaena palmeri skull
* Piscobalaena
* Thinocetus
* Titanocetus
* Tiucetus
* Vampalus
* Zygiocetus

##### Family Diorocetidae

(Miocene to Pliocene)
* Amphicetus
* Diorocetus
* Plesiocetopsis
* Uranocetus

##### Family Neobalaenidae

(Miocene to Recent)
* Miocaperea

##### Family Pelocetidae

(Miocene)
* Cophocetus
* Parietobalaena
* Pelocetus

##### Family incertae sedis

* Isanacetus
* Pinocetus
* Mauicetus
* Taikicetus
* Tiphyocetus

#### Superfamily Balaenopteroidea

* Eobalaenoptera

##### Family Balaenopteridae

(Miocene to Recent)
* Archaebalaenoptera
* Balaenoptera (extant)
** Balaenoptera bertae
** Balaenoptera cephalus
** Balaenoptera colcloughi
** Balaenoptera davidsonii
** Balaenoptera siberi
** Balaenoptera sursiplana
** Balaenoptera taiwanica
* "Balaenoptera" cortesii
* "Balaenoptera" portisi
* "Balaenoptera" ryani
* Burtinopsis
* Cetotheriophanes
* Fragilicetus
* Incakujira
* Marzanoptera
* Miobalaenoptera
* Norrisanima
* Nehalaennia
* Parabalaenoptera
* Plesiobalaenoptera
* Plesiocetus
* Praemegaptera
* Protororqualus

##### Family Eschrichtiidae

(Miocene to Recent)
* Archaeschrichtius
* Eschrichtioides
* Gricetoides
* Megapteropsis

##### Family Tranatocetidae

* Mesocetus
* Mixocetus
* Tranatocetus

##### Family incertae sedis

* Mioceta (nomen dubium)
* Piscocetus
* Siphonocetus (nomen dubium)
* Tretulias (nomen dubium)
* Ulias (nomen dubium)

## Suborder Odontoceti
### Basal forms
#### Family Agorophiidae

(Early Oligocene)
* Agorophius

#### Family Ashleycetidae

(Early Oligocene)
* Ashleycetus

#### Family Patriocetidae

(Oligocene to Early Miocene)
* Patriocetus

#### Family Simocetidae

(Early Oligocene)
* Simocetus

#### Family Xenorophidae

(Late Oligocene)
* Albertocetus
* Archaeodelphis
* Cotylocara
* Echovenator
* Inermorostrum
* Mirocetus
* Xenorophus

#### Family Inticetidae

* Inticetus
* Phococetus

#### Family Microzeuglodontidae

* Microzeuglodon

#### Family Squaloziphiidae

(Late Oligocene to Early Miocene)
* Squaloziphius
* Yaquinacetus

#### Family incertae sedis

* Ankylorhiza
* Agriocetus
* Atropatenocetus
* Ediscetus
* Olympicetus
* Saurocetus

### Superfamily Squalodontoidea
#### Family Dalpiazinidae

(Late Oligocene to Miocene)
* Dalpiazina

#### Family Prosqualodontidae

(Late Oligocene-Middle Miocene)
* Parasqualodon
* Prosqualodon

### Superfamily Physeteroidea
#### Family Kogiidae

(Miocene to recent)
* Aprixokogia
* Kogia (extant)
** Kogia pusilla
** Kogia danomurai
* Kogiopsis
* Koristocetus
* Nanokogia
* Platyscaphokogia
* Pliokogia
* Praekogia
* Scaphokogia
* Thalassocetus

#### Family Physeteridae

* Cozzuoliphyseter
* Eophyseter
* Ferecetotherium
* Idiophyseter
* Idiorophus
* Orycterocetus
* Physeterula
* Placoziphius
* Preaulophyseter
* Scaldicetus

#### Family incertae sedis

* Acrophyseter
* Albicetus
* Aulophyseter
* Brygmophyseter
* Diaphorocetus
* Eudelphis
* Hoplocetus (nomen dubium)
* Livyatan
* Miokogia (nomen dubium)
* Paleophoca (nomen dubium)
* Prophyseter (nomen dubium)
* Rhaphicetus
* Zygophyseter

### Superfamily "Eurhinodelphinoidea"
#### Family Argyrocetidae

(Late Oligocene to Early Miocene)
* Argyrocetus
* Chilcacetus
* Macrodelphinus

#### Family Eoplatanistidae

(Miocene)
* Eoplatanista

#### Family Eurhinodelphinidae

(Late Oligocene to Late Miocene)
* Ceterhinops
* Eurhinodelphis
* Iniopsis
* Mycteriacetus
* Phocaenopsis
* Schizodelphis
* Vanbreenia
* Xiphiacetus
* Ziphiodelphis

### Superfamily Platanistoidea

* Aondelphis
* Awamokoa
* Dolgopolis
* Ensidelphis
* Perditicetus
* Urkudelphis

#### Family Allodelphinidae

(Late Oligocene to Middle Miocene)
* Allodelphis
* Arktocara
* Goedertius
* Ninjadelphis
* Zarhinocetus

#### Family Platanistidae

(Early Miocene to Recent)
* Araeodelphis
* Dilophodelphis
* Pachyacanthus
* Pomatodelphis
* Prepomatodelphis
* Zarhachis

#### Family Squalodelphinidae

(Late Oligocene to Middle Miocene)
* Furcacetus
* Furcadelphis
* Huaridelphis
* Macrosqualodelphis
* Medocinia
* Notocetus
* Phocageneus
* Squalodelphis

#### Family Squalodontidae

(Late Oligocene to Middle Miocene)
* Austrosqualodon
* Eosqualodon
* Macrophoca
* Neosqualodon
* Pachyodon
* Phoberodon
* Squalodon (syn. Kelloggia, Rhizoprion, Crenidelphinus, Arionius, Phocodon)
* Smilocamptus
* Tangaroasaurus

#### Family Waipatiidae

(Late Oligocene to Early Miocene)
* ?Microcetus
* Otekaikea
* Papahu
* Sachalinocetus
* Waipatia

### Superfamily Ziphioidea
#### Family Ziphiidae

(Miocene to Recent)
* Basal forms
** Aporotus
** Beneziphius
** Chavinziphius
** Chimuziphius
** Choneziphius
** Dagonodum
** Globicetus
** Imocetus
** Messapicetus
** Ninoziphius
** Notoziphius
** Tusciziphius
** Ziphirostrum
* Subfamily Berardiinae
** Archaeoziphius
** Microberardius
* Subfamily Hyperoodontinae
** Africanacetus
** Belemnoziphius
** Ihlengesi
** Khoikhoicetus
** Mesoplodon (extant)
*** Mesoplodon posti
*** Mesoplodon slangkopi
*** Mesoplodon tumidirostris
** Nenga
** Pterocetus
** Xhosacetus
* Subfamily Ziphiinae
** Caviziphius
** Izikoziphius
** Nazcacetus
* Subfamily incertae sedis
** Anoplonassa
** Cetorhynchus
** Eboroziphius
** Pelycorhamphus

### Clade Delphinida
#### Family incertae sedis

* Anacharsis
* Belonodelphis
* Delphinavus
* Graamocetus
* Hadrodelphis
* Lamprolithax
* Leptodelphis
* Liolithax
* Lophocetus
* Loxolithax
* Macrokentriodon
* Microphocaena
* Miodelphis
* Nannolithax
* Oedolithax
* Oligodelphis
* Palaeophocaena
* Pithanodelphis
* Platylithax
* Prionodelphis
* Protodelphinus
* Sarmatodelphis
* Sophianacetus
* Tagicetus

#### Superfamily Delphinoidea
##### Family Albireonidae

(Miocene to Pliocene)
* Albireo

##### Family Delphinidae

(Oligocene to Recent)
* Arimidelphis
* Astadelphis
* Australodelphis
* Delphinus (extant)
** Delphinus domeykoi
* Eodelphinus
* Etruridelphis
* Hemisyntrachelus
* Lagenorhynchus (extant)
** Lagenorhynchus harmatuki
* Norisdelphis
* Globicephala (extant)
** Globicephala baereckeii
** Globicephala etruriae
* Orcinus (extant)
** Orcinus citoniensis
** Orcinus meyeri
** Orcinus paleorca
* Platalearostrum
* Protoglobicephala
* Pseudorca (extant)
** Pseudorca yokoyamai
** Pseudorca yuanliensis
* Septidelphis
* Sinanodelphis
* Stenella (extant)
** Stenella rayi
* Tursiops (extant)
** Tursiops miocaenus
** Tursiops osennae

##### Family Kentriodontidae

(Oligocene to Pliocene)
* Kampholophos
* Kentriodon
* Rudicetus
* Sophianaecetus
* Wimahl
* Belonodelphis?
* Liolithax?

##### Family Monodontidae

(Miocene to Recent)
* Bohaskaia
* Casatia
* Denebola
* Haborodelphis

##### Family Odobenocetopsidae

(Late Miocene to Early Pliocene)
* Odobenocetops

##### Family Phocoenidae

(Miocene to Recent)
* Archaeophocaena
* Australithax
* Brabocetus
* Harborophocoena
* Lomacetus
* Miophocaena
* Numataphocoena
* Piscolithax
* Pterophocaena
* Salumiphocaena
* Semirostrum
* Septemtriocetus

#### Superfamily Inioidea

* Awadelphis
* Brujadelphis
* Incacetus
* Meherrinia

##### Family Iniidae

(Miocene to Recent)
* Goniodelphis
* Hesperoinia
* Ischyrorhynchus
* Isthminia
* Kwanzacetus
* Saurocetes

##### Family Pontoporiidae

(Middle Miocene to Recent)
* Atocetus
* Auroracetus
* Brachydelphis
* Pliopontos
* Pontistes
* Protophocaena
* Samaydelphis
* Scaldiporia
* Stenasodelphis

#### Superfamily Lipotoidea
##### Family Lipotidae

(Late Miocene to Recent)
* Parapontoporia

#### Superfamily incertae sedis

* Delphinodon
* Heterodelphis

##### Family incertae sedis

* Acrodelphis
* Champsodelphis
* Hesperocetus
* Imerodelphis (Miocene)
* Kharthlidelphis
* Lonchodelphis
* Macrochirifer
* Microsqualodon
* Pelodelphis
* Rhabdosteus (nomen dubium)
* Sulakocetus