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Taxon: Order Gymnotiformes Gill, 1872 - Neotropical knifefishes (fish)
 Entity: 

Concise hierarchy

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

Current position

Characiphysae (Superorder) Fink & Fink, 1981 Ref: E.O. Wiley & G.D. Johnson, 2010: 126; [Dornburg & Near, 2021: fig. 1; ECoF(9 Apr 2025)].

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.
Ostariophysi (Division) Sagemehl, 1885 Ref: M.J. Benton, 2005: 392.
Otophysa (Section) Rosen & Greenwood, 1970 Ref: R. van der Laan, 2018: 66.
Siluriphysae (Superorder) Ref: R. Betancur-R et al., 2017: 17.
Siluriphysi (Subseries) Fink & Fink, 1996 Ref: J.S. Nelson et al., 2016: 238.
Siluriphysi ([unranked]) Fink & Fink, 1996 Ref: J.S. Nelson, 2006: 186.

Historical positions

Otophysa (Section) Rosen & Greenwood, 1970 Ref: R. van der Laan, 2018: 66.
Siluriphysae (Superorder) Ref: R. Betancur-R et al., 2017: 17, fig. 1.
Actinopterygii (Class) Woodward, 1891 Ref: W.N. Eschmeyer, 2004-2016: 24 Jan 2006.
Siluriphysi (Subseries) Fink & Fink, 1996 Ref: J.S. Nelson et al., 2016: 238, figs. (pp. 175, 209).
Actinopterygii (Class) Woodward, 1891 Ref: W.N. Eschmeyer & J.D. Fong, 2011: 30.
Characiphysae (Superorder) Fink & Fink, 1981 Ref: E.O. Wiley & G.D. Johnson, 2010: 126, 140.
Siluriphysi ([unranked]) Fink & Fink, 1996 Ref: E.O. Wiley & G.D. Johnson, 2010: 138. [excluded]
Siluriphysi ([unranked]) Fink & Fink, 1996 Ref: J.S. Nelson, 2006: 186; 138.
Ostariophysi (Division) Sagemehl, 1885 Ref: M.J. Benton, 2005: 392.
Actinopterygii (Class) Woodward, 1891 Ref: 1998
Actinopterygii (Class) Woodward, 1891 Ref: W.N. Eschmeyer, 1998: 2463.

Number of Subtaxa

2025 Available in Systema Naturae 2000 5f;36g;156s; †1g;1s
1989-present Systema Naturae 2000: 26 May 2025 [5f;36g]
2018 R. van der Laan: 66 [5f]
2017 R. Betancur-R et al.: 17 [5f]
2016 J.S. Nelson et al.: 241 [5f]
2004-2016 W.N. Eschmeyer: 24 Jan 2006 [6f]
2011 W.N. Eschmeyer & J.D. Fong: 30 5f
2010 E.O. Wiley & G.D. Johnson: 140 2so;5f
1998 W.N. Eschmeyer 6f
©2004-2025 Universal Taxonomic Services
Last updated: 21 Sep 2025