Concise hierarchy

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

Current position

Protacanthopterygii (Infracohort) Greenwood et al., 1966

Ref: R. van der Laan, 2018: 68.

Alternative positions

Actinopteri (Class) Cope, 1871	Ref: R. van der Laan et al., 2021: (4 Feb 2025); ECoF(4 Feb 2025).
Actinopterygii (Class) Woodward, 1891	Ref: W.N. Eschmeyer & J.D. Fong, 2011: 30.
Actinopterygii (Subclass) Woodward, 1891	Ref: R.A. Fritzsche, 1982: 867.
Euteleostei (Subcohort) Greenwood et al., 1966	Ref: M.J. Benton, 2005: 392.
Euteleostei (Subdivision) Greenwood et al., 1966	Ref: R.L. Carroll, 1988: 605.
Osteichthyes (Class) Huxley, 1880	Ref: J.J. Sepkoski Jr., 2002: 311.
Protacanthopterygii (Superorder) Greenwood et al., 1966	Ref: J.S. Nelson et al., 2016: 244; Nelson et al., 2016: fig. (p. 242).
Protacanthopterygii (Subcohort) Greenwood et al., 1966	Ref: R. Betancur-R et al., 2017: 18.

Historical positions

Protacanthopterygii (Infracohort) Greenwood et al., 1966	Ref: R. van der Laan, 2018: 68.
Protacanthopterygii (Subcohort) Greenwood et al., 1966	Ref: R. Betancur-R et al., 2017: 18, fig. 1.
Protacanthopterygii (Superorder) Greenwood et al., 1966	Ref: J.S. Nelson et al., 2016: 244, fig. (p. 242).
Actinopterygii (Class) Woodward, 1891	Ref: W.N. Eschmeyer, 2004-2016: 24 Jan 2006.
Actinopterygii (Class) Woodward, 1891	Ref: W.N. Eschmeyer & J.D. Fong, 2011: 30.
Protacanthopterygii (Subcohort) Greenwood et al., 1966	Ref: E.O. Wiley & G.D. Johnson, 2010: 126, 141.
Protacanthopterygii (Superorder) Greenwood et al., 1966	Ref: J.S. Nelson, 2006: 190, 199.
Euteleostei (Subcohort) Greenwood et al., 1966	Ref: M.J. Benton, 2005: 392, box 7.6.
Osteichthyes (Class) Huxley, 1880	Ref: J.J. Sepkoski Jr., 2002: 311.
Osteichthyes (Class) Huxley, 1880	Ref: N. Bailly et al., 2001: 362.
Actinopterygii (Class) Woodward, 1891	Ref: 1998
Actinopterygii (Class) Woodward, 1891	Ref: W.N. Eschmeyer, 1998: 2464.
Euteleostei (Subdivision) Greenwood et al., 1966	Ref: R.L. Carroll, 1988: 605.
Actinopterygii (Subclass) Woodward, 1891	Ref: R.A. Fritzsche, 1982: 867; 1114.
Protacanthopterygii (Superorder) Greenwood et al., 1966	Ref: T.I. Storer et al., 1979: 683.
Teleostei (Superorder) Bonaparte, 1836	Ref: B. Grzimek, 1973-1975

Number of Subtaxa

2025	Available in Systema Naturae 2000	3f;15g;178s;32ss; ‡1s; †1f;8g;8s
1989-present	Systema Naturae 2000: 11 Jun 2025	[3f;15g; †1f]
2018	R. van der Laan: 68	[1f]
2017	R. Betancur-R et al.: 18	[1f]
2016	J.S. Nelson et al.: 248	[1f]
2004-2016	W.N. Eschmeyer	[1f]
2011	W.N. Eschmeyer & J.D. Fong: 30	1f
2010	E.O. Wiley & G.D. Johnson: 141	3so;[6f]
2000		64s; †5s
1998	W.N. Eschmeyer	1f
1988	R.L. Carroll: 605	[11f]
1982	R.A. Fritzsche: 867	5so;24[23]f;145g;508s
1973-1975	B. Grzimek	8so