Order Anseriformes Wagler, 1831 - waterfowl and screamers Suborder Anseres Linnaeus, 1758 - waterfowl Family Anatidae Vigors, 1825 - ducks, geese, swans Subfamily Plectropterinae G.R. Gray - spur-winged geese see Subfamily Tadorninae Reichenbach Genus †Loxornis Ameghino, 1895