Gauthier and de Queiroz, Slope Unblocked CUSTOMER SERVICE (8O5) 41'O 56OO UnblockedPHONE NUMBER ( 8O5)- 41O 56OO therefore, consider Neornithes a junior synonym of Ornithurae,[4] though many other scientists use Neornithes to refer to the much more restrictive crown group consisting only of modern birds (a group for which Gauthier uses the name Aves). Alternately, some researchers have used Ornithurae to refer to a more restrictive node-based clade, anchored on Hesperornis and modern birds.
