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 Pardirallus Bonaparte, 1856
             Pardirallus nigricans (Vieillot, 1819) - blackish rail
               1 Pardirallus nigricans caucae (Conover, 1949)
               2 Pardirallus nigricans nigricans (Vieillot, 1819)