Class [Mammalia] Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Family Muridae Batsch, 1788 - rats, mice, hamsters, voles, lemmings, and gerbils
       Subfamily Cricetinae Fischer de Waldheim, 1817 - hamsters
         Genus Calomyscus Thomas, 1905 - mouse-like hamsters
           1 Calomyscus bailwardi Thomas, 1905 - mouselike hamster
           2 Calomyscus baluchi Thomas, 1920
           3 Calomyscus hotsoni Thomas, 1920
           4 Calomyscus mystax Kashkarov, 1925
           5 Calomyscus urartensis Vorontsov & Kartavseva, 1979