Concise hierarchy

(Kingdom) Animalia - (Phylum) Chordata - (Class) Reptilia

Subsequent positions

Ratitae (Infraclass) (Merrem, 1813) P. Brodkorb, 1963		Ref: P. Brodkorb, 1963: 205. [assumed]
Struthionimorphae (Superorder) B.C. Livezey & R.L. Zusi, 2007		Ref: B.C. Livezey & R.L. Zusi, 2007: 89. [assumed]

Current position

Struthionimorphae (Superorder) B.C. Livezey & R.L. Zusi, 2007

Ref: B.C. Livezey & R.L. Zusi, 2007: 89. [new position]

Alternative positions

Palaeognathae (Superorder) Pycraft, 1900	Ref: R.L. Carroll, 1988: 624.
Ratitae (Parvclass) (Merrem, 1813)	Ref: E. Fuller, 2001: 29. [indirect]
Ratitae (Infraclass) (Merrem, 1813) P. Brodkorb, 1963	Ref: P. Brodkorb, 1963: 205. [new position]

Historical positions

Struthionimorphae (Superorder) B.C. Livezey & R.L. Zusi, 2007	Ref: B.C. Livezey & R.L. Zusi, 2007: 89. [new position]
Aves (Class) Linnaeus, 1758	Ref: 1995
Palaeognathae (Superorder) Pycraft, 1900	Ref: R.L. Carroll, 1988: 624.
Neognathae (Superorder) Pycraft, 1900	Ref: T.I. Storer et al., 1979
Ratitae (Infraclass) (Merrem, 1813) P. Brodkorb, 1963	Ref: P. Brodkorb, 1963: 205. [new position]

Number of Subtaxa

2024	Available in Systema Naturae 2000	‡1f;1g;1s‡‡3g;7s
1989-present	Systema Naturae 2000	‡1f;1g‡‡3g
2007	B.C. Livezey & R.L. Zusi	[; ‡1f]
1988	R.L. Carroll: 624	[; ‡1f]
1963	P. Brodkorb	[; ‡1f;1g; †3g]