Clade Ratitae Merrem 1813 (bird)
Parent taxon: Palaeognathae according to B. C. Livezey and R. L. Zusi 2007
See also Andrews 1906, Baur 1887, Gadow 1898, Gardiner 1982, Hay 1902, Jaekel 1911 and Zittel 1890
Sister taxa: Aepyornithiformes, Ambiortiformes, Crypturi, Eremopezidae, Lithornidae, Lithornithidae, Medioolithidae, Palaeocursornithiformes, Patagopterygiformes, Remiornithidae, Remiornithiformes, Rheiformes, Struthioniformes
Subtaxa: Apterygimorphae Casuariimorphae Struthiones Struthionimorphae
Ecology: ground dwelling carnivore