They are divided into 4 groups:
* Tylopoda (Camels)
* Suina (Pigs)
* Whippomorpha (Whales and Hippos)
* Ruminantia (Ruminants)
They bear their weight on 2 of the 5 toes
The muscles of the limbs are predominantly localised.
They have slender legs
Their incisors in the upper jaw are absent
Their eyes are in the side
Tylopoda
Whippomorpha
Suina
Ruminantia