(Eudromia_elegans,(Odontophorus_capueira,(Chauna_torquata,(Anseranas,(Presbyornis,(Cereopsis,(Coscoroba_coscoroba,((Anser_rossii,(((Tadorna_radjah,(((Mergus_serrator,(Netta_peposaca,(Aythya_affinis,(Somateria_mollisima,(Cayaoa_bruneti,((Thalassornis,Biziura_lobata),(Oxyura_vittata,(Oxyura_jamaicensis,Nomonyx_dominicus)))))))),((Aix_galericulata,Aix_sponsa),((Anas_georgica,(Anas_platyrhinchos,Anas_sibilatrix)),(Amazonetta_brasiliensis,(Lophonetta_specularioides,(Tachyeres_patachonicus,Tachyeres_leucocephalus)))))),(Stictonetta,Malacorhynchus))),(Chloephaga_picta,Chloephaga_poliocephala)),(Dendrocygna_viduata,Dendrocygna_bicolor))),(Branta_canadensis,Cygnus_melanocoryphus)))))))));