Hierarchy classification:

1. top of the aat hierarchies
2. Agents Facet
3. Living Organisms (hierarchy name)
4. living organisms (entities)
5. Eukaryota (domain)
6. Animalia (kingdom)
7. Chordata (phylum)
8. Vertebrata (subphylum)
9. Mammalia (class)
10. Perissodactyla (order)
11. Equidae (family)

Narrower term/s

• Equus caballus (species)[+]
  • Equus caballus przewalskii (subspecies)
  • Thoroughbreds (breed)
  • Arabian horses (breed)
  • Belgian horses (breed)
  • Percherons (breed)
  • [horses by size] [+]
    • ponies (animals)
    • light horses
    • heavy horses
  • [horses by use or role] [+]
    • draft horses
    • riding horses (animals)
    • war horses
    • trotters (horses)
    • racehorses
  • Barb horses (breed)
• Equus asinus (species)[+]
  • donkeys
• mules (mammals)
• Equus hemionus (species)[+]
  • Equus hemionus hemionus (subspecies)
  • Equus hemionus hemippus (subspecies)
  • Equus hemionus kiang (subspecies)
  • Equus hemionus khur (subspecies)
  • Equus hemionus onager (subspecies)
• asses (mammals)[+]
  • Equus asinus (species) [NP] [+]
    • donkeys
  • Equus hemionus (species) [NP] [+]
    • Equus hemionus hemionus (subspecies)
    • Equus hemionus hemippus (subspecies)
    • Equus hemionus kiang (subspecies)
    • Equus hemionus khur (subspecies)
    • Equus hemionus onager (subspecies)
  • [asses by sex] [+]
    • jackasses
    • she-asses
• hinnies
• zebras (mammals)[+]
  • Equus quagga (extinct species) [NP]
  • Equus grevyi (species) [NP]
  • Equus burchellii (species) [NP]
  • Equus zebra (species) [NP]
• Equus quagga (extinct species)
• Equus grevyi (species)
• Equus burchellii (species)
• Equus zebra (species)
• [equines by sex or age][+]
  • stallions [+]
    • studs (animals)
    • geldings (animals)
  • mares (equines)
  • foals [+]
    • colts
    • fillies

Anotations

Scope note:

Genus including horses and similar animals. It evolved from small animals with multi-toed padded hooves. Equus is the only surviving genus in the once diverse family of horses. It was domesticated about 3,000 years ago.