The Odd Toed Ungulates (Perissodactyla) - Order
(Titanotheriomorpha) - suborder -extinct-

(Brontotheriidae)
- family -extinct-
(Hippomorpha) - suborder

(Hyopsodontidae)
- family -extinct-

(Pachynolophidae)
- family -extinct-

(Indolophidae)
- family -extinct-

(Palaeotheriidae)
- family -extinct-
The Horses & related
(Equidae)
- family
(Ancylopoda) - suborder

(Isectolophidae)
- family -extinct-

(Lophiodontidae)
- family -extinct-

(Eomoropidae)
- family -extinct-

(Chalicotheriidae)
- family -extinct-
(Ceratomorpha) - suborder

(Amynodontidae)
- family -extinct-

(Hyracodontidae)
- family -extinct-

(Deperetellidae)
- family -extinct-

(Rhodopagidae)
- family -extinct-

(Lophialetidae)
- family -extinct-

(Eoletidae)
- family -extinct-

(Anthracobunidae)
- family -extinct-

(Phenacodontidae)
- family -extinct-
The Tapars
(Tapiridae)
- family
The Rhinoceroses
(Rhinocerotidae)
- family