Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893 Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988 Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988 Superorder Apodimorphae see Order Apodiformes Peters, 1940 Order Apodiformes Peters, 1940 - swifts 1 Family Apodidae Hartert, 1897 - swifts 2 Family Hemiprocnidae Oberholser, 1906 - treeswifts