Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Galloanserae Sibley, Ahlquist & Monroe Jr., 1988 see Subcohort Galloanserae Sibley, Ahlquist & Monroe Jr., 1988
       [Order] Galliformes Temminck, 1820 - fowl
         phasianoids see Superfamily Phasianoidea Vigors, 1825
           Family Odontophoridae (Gould, 1844) - New World quails see Subfamily Odontophorinae Gould, 1844
             Genus Cyrtonyx Gould, 1844
               Cyrtonyx montezumae (Vigors, 1830) - Montezuma quail
                 1 Cyrtonyx montezumae mearnsi Nelson, 1900
                 2 Cyrtonyx montezumae montezumaeᵀ (Vigors, 1830) - Montezuma quail
                 3 Cyrtonyx montezumae merriami Nelson, 1897 - Merriam's Montezuma quail
                 4 Cyrtonyx montezumae rowleyi Phillips, 1966
                 5 Cyrtonyx montezumae sallei Verreaux, 1859 - Salle's quail