Invalid names: Callornis giganteus Ameghino 1894 [synonym], Darwinornis copei Moreno and Mercerat 1891 [synonym], Darwinornis socialis Moreno and Mercerat 1891 [synonym], Darwinornis zitteli Moreno and Mercerat 1891 [synonym], Eucallornis giganteus Ameghino 1901 [synonym], Liornis minor Dolgopol de Saez 1927 [synonym], Mesembriornis quatrefragesi Moreno and Mercerat 1891 [synonym], Mesembriornis studeri Moreno and Mercerat 1891 [synonym], Owenornis affinis Moreno and Mercerat 1891 [synonym], Owenornis lydekkeri Moreno and Mercerat 1891 [synonym], Phororhacos platygnathus Ameghino 1891 [synonym], Phororhacos sehuensis Ameghino 1891 [synonym], Stereornis gaudryi Moreno and Mercerat 1891 [synonym], Stereornis rollieri Moreno and Mercerat 1891 [synonym], Titanornis mirabilis Mercerat 1893 [synonym]