Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893 1 Infraclass Eoaves Sibley et al., 1988 see Cohort Palaeognathae Pycraft, 1900 2 Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988