the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Chordata (phylum)
Craniata (subphylum)
Vertebrata (no rank)
Gnathostomata (superclass)
Sarcopterygii (class)
Tetrapoda (no rank)
Amniota (no rank)
Sauropsida (no rank)
Sauria (no rank)
Archosauria (no rank)
Aves (class)
Palaeognathae (superorder)
Rheiformes (order)
Rheidae (family)
Pterocnemia pennata (species)
lesser rhea (common name)
[hide inferior taxa]