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
       Psittacidae Illiger, 1811 - cockatoos and parrots
         Psittacinae Illiger, 1811 - typical parrots
           Arini Gray, 1840
             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)