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 Psittacula Cuvier, 1800
                 Psittacula longicauda (Boddaert, 1783) - long-tailed parakeet
                   1 Psittacula longicauda tytleri (Hume, 1874)
                   2 Psittacula longicauda nicobarica (Gould, 1857)
                   3 Psittacula longicauda longicauda (Boddaert, 1783)
                   4 Psittacula longicauda modesta (Fraser, 1845)
                   5 Psittacula longicauda defontainei Chasen, 1935