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Paraphyletic taxon: Order †Climatiiformes Berg, 1940 (fish)
 Entity: 

Concise hierarchy

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

Phylogeny

Possibly Paraphyletic/Ancestral (para) Ref: J.S. Nelson, 2006: 85 ("may be paraphyletic").
Probably Paraphyletic/Ancestral (para) Ref: J.S. Nelson et al., 2016: 98 ("very likely paraphyletic").

Current position

†Acanthodii (Class) Owen, 1846 Ref: R. van der Laan, 2018: 34; [Chevrinais et al., 2017: fig. 6].

Historical positions

†Acanthodii (Class) Owen, 1846 Ref: R. van der Laan, 2018: 34.
†Acanthodii (Class) Owen, 1846 Ref: J.S. Nelson et al., 2016: 98.
†Acanthodii (Class) Owen, 1846 Ref: J.S. Nelson, 2006: 85.
†Acanthodii (Class) Owen, 1846 Ref: J.J. Sepkoski Jr., 2002: 305.
†Acanthodii (Class) Owen, 1846 Ref: R.L. Carroll, 1988: 601.

Number of Subtaxa

2025 Available in Systema Naturae 2000 †5f;15g;2s
1989-present Systema Naturae 2000: 23 Apr 2024 [; †5f]
2018 R. van der Laan: 34 [; †5f]
2016 J.S. Nelson et al.: 99 [; †4f]
1988 R.L. Carroll: 601 [; †3f]
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Last updated: 21 Sep 2025