----------------+--------------------------------+------------------------+------------------- _Orders_ | | | _of_ | _Sections_ | _Families_ | _Systematic Name_ _Hoofed_ | _of_ | _of_ | _of_ _animals._ | _Hoofed Animals._ | _Hoofed Animals._ | _the Families._ ----------------+----------------------------=---+------------------------+------------------- I. { I. Primary Hoofed { 1. Lophiodonta 1. Lophiodontia* =Odd-toed= { Animals.* { 2. Pliolophida 2. Pliolophida* =Hoofed= { _Prochela_ =Animals= { { 3. Primary 3. Palæotherida* { { Odd-hoofs +Ungulata+ { II. Tapir-shaped { 4. Lama-tapirs 4. Macrauchenida* { _Tapiromorpha_ { 5. Tapirs 5. Tapirida +Perissodactyla+ { { 6. Rhinoceroses 6. Nasicornia { { 7. Rhinoceros-horses 7. Elasmotherida* { { III. Single-hoofs { 8. Primæval 8. Anchitherida* { _Solidungula_ { horses { { 9. Horses 9. Equina