Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Coraciae see Order Coraciiformes Forbes, 1884
         Superorder Coraciimorphae see Order Coraciiformes Forbes, 1884
           Order Trogoniformes Wetmore & Miller, 1926 - trogons
             Family Trogonidae Lesson, 1828 - trogons
               Subfamily Trogoninae
                 Tribe Trogonini - New World trogons
                   Genus Trogon Brisson, 1760
                     Trogon massena Gould, 1838 - slaty-tailed trogon
                       Trogon massena massenaᵀ Gould, 1838 - slaty-tailed trogon