Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Lagomorpha Brandt, 1855 - lagomorphs
       Family Leporidae Batsch, 1788 - hares and rabbits
         Genus Sylvilagus Gray, 1867 - cottontails
           Subgenus Sylvilagus Gray, 1867
             Sylvilagus audubonii (Baird, 1858) - desert cottontail
               1 [Sylvilagus audubonii audubonii]ᵀ (Baird, 1858)
               2 Sylvilagus audubonii arizonae (Mearns, 1896)
               3 Sylvilagus audubonii baileyi (Merriam, 1897)
               4 Sylvilagus audubonii confinis J. Allen, 1898
               5 Sylvilagus audubonii goldmani (Nelson, 1904)
               6 Sylvilagus audubonii minor (Mearns, 1896)
               7 Sylvilagus audubonii warreni Nelson, 1907