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 [Psittaciformes] Wagler, 1830 [monotypic] - parrots
         Family Psittacidae Illiger, 1811 - cockatoos and parrots
           Subfamily Psittacinae Illiger, 1811 - typical parrots
             Tribe Psittaculini Vigors, 1825
               Genus Tanygnathus Wagler, 1832
                 Tanygnathus megalorhynchos (Boddaert, 1783)
                   1 Tanygnathus megalorhynchos megalorhynchos (Boddaert, 1783)
                   2 Tanygnathus megalorhynchos affinis Wallace, 1863
                   3 Tanygnathus megalorhynchos sumbensis Meyer, 1881
                   4 Tanygnathus megalorhynchos hellmayri Mayr, 1944
                   5 Tanygnathus megalorhynchos subaffinis Sclater, 1883