Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
   Infraclass Eoaves Sibley et al., 1988 see Cohort Palaeognathae Pycraft, 1900
     Parvclass Ratitae (Merrem, 1813) see Subcohort Ratitae Merrem, 1813
       1 Order Struthioniformes Latham, 1790
       2 Order Tinamiformes Huxley, 1872