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 Arini Gray, 1840
               Genus Aratinga Spix, 1824
                 Aratinga acuticaudata (Vieillot, 1818) - blue-crowned parakeet
                   1 Aratinga acuticaudata koenigi Arndt, 1990
                   2 Aratinga acuticaudata neoxena (Cory, 1909)
                   3 Aratinga acuticaudata haemorrhous Spix, 1824
                   4 Aratinga acuticaudata neumanni Blake & Traylor, 1947
                   5 Aratinga acuticaudata acuticaudata (Vieillot, 1818)