Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758 Subclass Ornithurae Haeckel, 1866 see Clade Ornithurae Haeckel 1866 [Gauthier 1986] {Chiappe 1991} Infraclass Carinatae Merrem, 1813 see Clade Carinatae Merrem 1813 [Gauthier & de Queiroz 2001] Order Pelecaniformes Sharpe, 1891 Suborder Pelecani Sharpe, 1891 see Infraorder Pelecanides Sharpe, 1891 Family Pelecanidae Rafinesque, 1815 - pelicans Genus †Liptornis Ameghino, 1895