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] Procellariiformes Fürbringer, 1888
         Family Procellariidae Leach, 1820 - petrels, shearwaters
           Genus Pterodroma Bonaparte, 1856
             Pterodroma phaeopygia (Salvin, 1876) - dark-rumped petrel
               1 Pterodroma phaeopygia phaeopygia (Salvin, 1876)
               2 Pterodroma phaeopygia sandwichensis (Ridgway, 1884) - hawaiian dark-rumped petrel