Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988
       [Order] Trogoniformes Wetmore & Miller, 1926 - trogons
         Family Trogonidae Lesson, 1828 - trogons
           1 Genus Apaloderma Swainson, 1833
           2 Genus Harpactes Swainson, 1833
           3 Genus Priotelus G.R. Gray, 1840
           4 Genus Trogon Brisson, 1760
           5 Genus Euptilotis Gould, 1858 [monotypic]
           6 Genus Pharomachrus De La Llave, 1832