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] Charadriiformes Huxley, 1867 - shorebirds, gulls, auks
         Family Thinocoridae Gray, 1845 - seedsnipes
           Genus Attagis Geoffroy Saint-Hilaire & Lesson, 1831
             Attagis gayi Geoffroy Saint-Hilaire & Lesson, 1831 - rufous-bellied seedsnipe
               Attagis gayi simonsi Chubb, 1918