Order Rheiformes (bird)
Parent taxon: Palaeognathae according to J. F. Clements et al. 2017
See also Carroll 1988, Livezey and Zusi 2007 and Mayr 2022
Sister taxa: Aepyornithiformes, Ambiortiformes, Crypturi, Eremopezidae, Lithornidae, Lithornithidae, Medioolithidae, Palaeocursornithiformes, Patagopterygiformes, Ratitae, Remiornithidae, Remiornithiformes, Struthioniformes
Subtaxa: Rheidae
Ecology: ground dwelling carnivore
Distribution: