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] Passeriformes Linnaeus, 1758
         suboscines see Suborder Suboscines
           Tyranni see Suborder Tyranni
             Family Tyrannidae Vigors, 1825 - tyrant-flycatchers
               Genus Mecocerculus P.L. Sclater, 1862
                 1 Mecocerculus leucophrys (d'Orbigny & Lafresnaye, 1837) - white-throated tyrannulet
                 2 Mecocerculus poecilocercus (Sclater & Salvin, 1873) - white-tailed tyrannulet
                 3 Mecocerculus hellmayri Berlepsch, 1907 - buff-banded tyrannulet
                 4 Mecocerculus calopterus (P.L. Sclater, 1859) - rufous-winged tyrannulet
                 5 Mecocerculus minor (Taczanowski, 1879) - sulphur-bellied tyrannulet
                 6 Mecocerculus stictopterus (P.L. Sclater, 1858) - white-banded tyrannulet