Concise hierarchy

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

Subsequent positions

Ratitae (Infraclass) (Merrem, 1813) P. Brodkorb, 1963		Ref: P. Brodkorb, 1963: 196. [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

Neornithes (Subclass) Gadow, 1893	Ref: B. Grzimek et al., 1973 (1968): 569.
Palaeognathae (Superorder) Pycraft, 1900	Ref: R.L. Carroll, 1988: 624.
Ratitae (Infraclass) (Merrem, 1813) P. Brodkorb, 1963	Ref: P. Brodkorb, 1963: 196. [new position]
Ratitae (Parvclass) (Merrem, 1813)	Ref: B.L. Monroe Jr. & C.G. Sibley, 1993: 1.

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
Ratitae (Parvclass) (Merrem, 1813)	Ref: B.L. Monroe Jr. & C.G. Sibley, 1993: 1.
Palaeognathae (Superorder) Pycraft, 1900	Ref: C.M. Perrins, 1991 (1990): 19, 366.
Palaeognathae (Superorder) Pycraft, 1900	Ref: R.L. Carroll, 1988: 624.
Palaeognathae (Superorder) Pycraft, 1900	Ref: W.J. Bock, 1982: 968.
Neornithes (Subclass) Gadow, 1893	Ref: E. Mayr & G.W. Cottrell, 1979
Neognathae (Superorder) Pycraft, 1900	Ref: T.I. Storer et al., 1979
Neornithes (Subclass) Gadow, 1893	Ref: B. Grzimek et al., 1973 (1968): 569.
Ratitae (Infraclass) (Merrem, 1813) P. Brodkorb, 1963	Ref: P. Brodkorb, 1963: 196. [new position]

Number of Subtaxa

2024	Available in Systema Naturae 2000	2f;3g;3s;12ss; ‡1ss; †3f;3g
1989-present	Systema Naturae 2000	[2f;3g;3s;12ss; ‡1ss]
2007	B.C. Livezey & R.L. Zusi	[2f]
2000		4f5g12s; †1s
1993	B.L. Monroe Jr. & C.G. Sibley	[2so;4f];5g;10s
1991 (1990)	C.M. Perrins	[1f;1g];1s
1990		4f
1988	R.L. Carroll: 624	[1f]
1982	W.J. Bock	1f;1g;1s
1979	E. Mayr & G.W. Cottrell	5f6g10s17ss; †1s1ss
1973 (1968)	B. Grzimek et al.	5f6g9s38ss; †2f10g25-30s2ss
1963	P. Brodkorb	[; †1f;1g]