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] Strigiformes Wagler, 1830 - owls
         Family Strigidae Vigors, 1825 - owls
           Subfamily Striginae Vigors, 1825 - strange-eared owls
             Genus Otus Pennant, 1769
               Otus guatemalae (Sharpe, 1875)
                 1 Otus guatemalae tomlini Moore, 1937
                 2 Otus guatemalae hastatus (Ridgway, 1887)
                 3 Otus guatemalae cassini (Ridgway, 1878)
                 4 Otus guatemalae fuscus Moore & Peters, 1939
                 5 Otus guatemalae thompsoni Cole, 1906
                 6 Otus guatemalae guatemalae (Sharpe, 1875)
                 7 Otus guatemalae dacrysistactus Moore & Peters, 1939