Order Testudines Wagler, 1830 - turtles
   Suborder Cryptodira Cope, 1868
     Superfamily Testudinoidea Batsch, 1788
       Family Testudinidae Batsch, 1788 - tortoises
         Genus Gopherus Rafinesque, 1832
           Gopherus agassizii (Cooper, 1861) - Mojave desert tortoise