Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988
         Superorder Passerimorphae Sibley et al., 1988
           Order Gruiformes Bonaparte, 1854
             Suborder Ralli Reichenbach - rails and allies
               Family Rallidae Vigors, 1825 - rails, waterhens, coots
                 Genus Porphyrio Brisson, 1760
                   1 Porphyrio porphyrio (Linnaeus, 1758) - purple swamphen
                   2 ‡Porphyrio albus (Shaw, 1790) - Lord Howe Island swamphen
                   3 Porphyrio mantelli (Owen, 1848) - takahe
                   4 Porphyrio alleni Thomson, 1842 - Allen's gallinule
                   5 Porphyrio martinicus (C. Linnaeus, 1766) - purple gallinule see Porphyrio martinica (Linnaeus, 1766)
                   6 Porphyrio flavirostris (Gmelin, 1789) - azure gallinule