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] Gruiformes Bonaparte, 1854
         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
             3.1 Porphyrio hochstetteri (Meyer, 1883)
             3.2 ‡Porphyrio mantelli (Owen, 1848) - takahe
             4 Porphyrio alleni Thomson, 1842 - Allen's gallinule
             5 Porphyrio martinica (Linnaeus, 1766)
             6 Porphyrio flavirostris (Gmelin, 1789) - azure gallinule