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 Dactylortyx Ogilvie-Grant, 1893 [monotypic]
               Dactylortyx thoracicus (Gambel, 1848) - singing quail
                 01 Dactylortyx thoracicus pettingilli Warner & Harrell, 1957
                 02 Dactylortyx thoracicus thoracicusᵀ (Gambel, 1848)
                 03 Dactylortyx thoracicus sharpei Nelson, 1903
                 04 Dactylortyx thoracicus paynteri Warner & Harrell, 1955
                 05 Dactylortyx thoracicus devius Nelson, 1898
                 06 Dactylortyx thoracicus melodus Warner & Harrell, 1957
                 07 Dactylortyx thoracicus chiapensis Nelson, 1898
                 08 Dactylortyx thoracicus dolichonyx Warner & Harrell, 1957
                 09 Dactylortyx thoracicus salvadoranus Dickey & van Rossem, 1928
                 10 Dactylortyx thoracicus fuscus Conover, 1937
                 11 Dactylortyx thoracicus conoveri Warner & Harrell, 1957