Class Mammalia Linnaeus, 1758 - mammals
Count: 29o;11f;21g; ‡1f
   Subclass Theria Parker & Haswell, 1897
  Count: 28o;9f;21g; ‡1f
     Order Perissodactyla Owen, 1848 - odd-toed ungulates
    Count: [*†*] 3f;6g;16s;41ss; ‡1s;3ss
       Family Equidae Gray, 1821 [monotypic] - horses, zebras, and asses
      Count: [*†*] 1g;7s;22ss; ‡1s;2ss
         Genus Equus Linnaeus, 1758 - horses, zebras, and asses
        Count: [*†*] 7s;22ss; ‡1s;2ss
           1 Equus asinus group Linnaeus, 1758 [monotypic]
          Count: [*] 1s;3ss
           2 Equus caballus group Linnaeus, 1758 [monotypic]
          Count: [*] 1s;3ss
           3 Equus grevyi group Oustalet, 1882 [monotypic]
          Count: [*] 1s
           4 Equus hemionus group Pallas, 1775
          Count: [*†*] 2s;9ss; ‡1ss
           5 Equus quagga group Boddaert, 1785
          Count: [*†*] 1s;5ss; ‡1s;1ss
           6 Equus zebra group Linnaeus, 1758 [monotypic]
          Count: [*] 1s;2ss