Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893 Order Struthioniformes Latham, 1790 Suborder Casuarii see Order Casuariiformes Sclater, 1880 Family Dromaiidae Huxley, 1868 - emus Genus Dromaius Vieillot, 1816 †Dromaius diemenianus (Jennings, 1828)