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 Porzana Vieillot, 1816
             Porzana tabuensis (Gmelin, 1789) - spotless crake
               1 Porzana tabuensis tabuensis (Gmelin, 1789)
               2 Porzana tabuensis richardsoni Rand, 1940
               3 Porzana tabuensis edwardi Gyldenstolpe, 1955