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 Fulica Linnaeus, 1758
             Fulica ardesiaca Tschudi, 1843 - slate-colored coot
               1 Fulica ardesiaca atrura Fjeldså, 1983
               2 Fulica ardesiaca ardesiaca Tschudi, 1843