| Cetruminantia Temporal range: Early Eocene to present
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Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Artiodactyla |
| Clade: | Artiofabula |
| Clade: |
Cetruminantia Waddell et al. 1999 |
| Subgroups | |
The Cetruminantia are a clade made up of the Cetancodontamorpha (or Whippomorpha) and their closest living relatives, the Ruminantia.
Cetruminantia's placement within Artiodactyla can be represented in the following cladogram:
| Artiodactyla |
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Classification
- Order Artiodactyla (even-toed ungulates)
- Tylopoda (camelids)
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Artiofabula (ruminants, pigs, peccaries, whales, and dolphins)
- Suina (pigs and peccaries)
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Cetruminantia (ruminants, whales, and dolphins)
- Suborder Ruminantia (antelope, buffalo, cattle, goats, sheep, deer, giraffes, and chevrotains)
- Family Antilocapridae (pronghorn)
- Family Bovidae, 135 species (antelope, bison, buffalo, cattle, goats, and sheep)
- Family Cervidae, 55~94 species (deer, elk, and moose)
- Family Giraffidae, 2 species (giraffes, okapis)
- Family Moschidae, 4~7 species (musk deer)
- Family Tragulidae, 6~10 species (chevrotains, or mouse deer)
- Suborder Whippomorpha (aquatic or semi-aquatic even-toed ungulates)
- Infraorder Acodonta
- Family Hippopotamidae, 2 species (hippopotamuses)
- Infraorder Cetacea (whales, dolphins, and porpoises)
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Mysticeti (baleen whales)
- Family Balaenidae, 2~4 species (right whales and bowhead whales)
- Family Balaenopteridae, 6~9 species (rorquals)
- Family Eschrichtiidae, 1 species (gray whale)
- Family Neobalaenidae, 1 species (pygmy right whale)
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Odontoceti (toothed whales, dolphins, and porpoises)
- Superfamily Delphinoidea (dolphins, arctic whales, porpoises, and relatives)
- Family Delphinidae, 38 species (dolphins, killer whales, and relatives)
- Family Monodontidae, 2 species (beluga and narwhal)
- Family Phocoenidae, 6 species (porpoises)
- Superfamily Physeteroidea (sperm whales)
- Family Kogiidae, 2 species (pygmy and dwarf sperm whales)
- Family Physeteridae, 1 species (common sperm whale)
- Superfamily Ziphoidea (beaked whales)
- Family Ziphidae, 22 species (modern beaked whales)
- Superfamily Platanistoidea (river dolphins)
- Family Iniidae, 1~3 species (South American river dolphin(s))
- Family Lipotidae, 1 species (baiji or Chinese river dolphin)
- Family Platanistidae, 1~2 species (Asian river dolphin(s))
- Family Pontoporiidae, 1 species (La Plata dolphin)
- Superfamily Delphinoidea (dolphins, arctic whales, porpoises, and relatives)
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Mysticeti (baleen whales)
- Infraorder Acodonta
- Suborder Ruminantia (antelope, buffalo, cattle, goats, sheep, deer, giraffes, and chevrotains)