Concise hierarchy

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

Subsequent positions

Hemiprocni (Suborder) B.C. Livezey & R.L. Zusi, 2007

Ref: B.C. Livezey & R.L. Zusi, 2007: 94. [assumed]

Current position

Hemiprocni (Suborder) B.C. Livezey & R.L. Zusi, 2007

Ref: B.C. Livezey & R.L. Zusi, 2007: 94. [new position]

Alternative positions

Apodi (Suborder) Peters, 1940	Ref: W.J. Bock, 1982: 991.
Apodiformes (Order) Peters, 1940	Ref: B.L. Monroe Jr. & C.G. Sibley, 1993: 63.

Historical positions

Hemiprocni (Suborder) B.C. Livezey & R.L. Zusi, 2007	Ref: B.C. Livezey & R.L. Zusi, 2007: 94. [new position]
Apodiformes (Order) Peters, 1940	Ref: E.C. Dickinson, 2003: 23, 254. [implicit]
Apodiformes (Order) Peters, 1940	Ref: 1995
Apodiformes (Order) Peters, 1940	Ref: B.L. Monroe Jr. & C.G. Sibley, 1993: 63.
Apodiformes (Order) Peters, 1940	Ref: C.M. Perrins, 1991 (1990): 381.
Apodi (Suborder) Peters, 1940	Ref: W.J. Bock, 1982: 991.
Apodiformes (Order) Peters, 1940	Ref: B. Grzimek et al., 1975 (1969): 581.

Number of Subtaxa

2026	Available in Systema Naturae 2000	1g;4s;12ss
1989-present	Systema Naturae 2000: 27 Oct 2021	[1g;4s;12ss]
2003	E.C. Dickinson: 255	[1g;4s;12ss]
1993	B.L. Monroe Jr. & C.G. Sibley	1g;4s
1982	W.J. Bock	1g;4s