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

Actinopterygii (Class) Woodward, 1891	Ref: W.N. Eschmeyer & J.D. Fong, 2011: 30.
Neognathi (Infracohort)	Ref: M.J. Benton, 2005: 392.
Protacanthopterygii (Superorder) Greenwood et al., 1966	Ref: J.S. Nelson et al., 2016: 248; 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: 248-249, 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 (Superorder) Greenwood et al., 1966	Ref: J.S. Nelson, 2006: 190, 204-205.
Neognathi (Infracohort)	Ref: M.J. Benton, 2005: 392, box 7.6.
Actinopterygii (Class) Woodward, 1891	Ref: W.N. Eschmeyer, 1998: 2463.

Number of Subtaxa

1989-present	Systema Naturae 2000: 11 Jun 2024	[2f;4g;13s;2ss; †1f]
2018	R. van der Laan: 68	[2f; †1f]
2017	R. Betancur-R et al.: 18	[2f]
2016	J.S. Nelson et al.: 251	[2f; †1f]
2004-2016	W.N. Eschmeyer: 24 Jan 2006	[2f]
2011	W.N. Eschmeyer & J.D. Fong: 30	2f
1998	W.N. Eschmeyer	2f