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
                 1 Tanygnathus megalorhynchos (Boddaert, 1783)
                 2 Tanygnathus lucionensis (Linnaeus, 1766) - blue-naped parrot
                 3 Tanygnathus sumatranus (Raffles, 1822) - blue-backed parrot
                 4 Tanygnathus gramineus (Gmelin, 1788) - black-lored parrot