Concise hierarchy

(Kingdom) Plantae - (Phylum) Tracheophyta - (Class) Isoëtopsida

Current position

Isoëtopsida (Class) Rolle (1884)

Ref: Новіков, А. & Барабаш-Красни, Б. / Novikoff, A. & Barabasz-Krasny, B., 2015: 45; Morris et al., 2018: Suppl. (p. [9]). [indirect]

Alternative positions

†Drepanophycopsida (Class) R.J. Rayner (1984)	Ref: A.B. Doweld, 2001: II.
Isoetopsida (Class) Rolle (1885)	Ref: Новіков, А. & Барабаш-Красни, Б. / Novikoff, A. & Barabasz-Krasny, B., 2015: 45; Morris et al., 2018: Suppl. (p. [9]). [indirect]
Lycopodiopsida (Class) Bartl. (1830)	Ref: Новіков, А. & Барабаш-Красни, Б. / Novikoff, A. & Barabasz-Krasny, B., 2015: 45; Wiki/Lycopodiopsida(27 Jan 2023).
Lycopsida (Class)	Ref: T.N. Taylor et al., 2009: table (p. 266).

Historical positions

Lycopodiopsida (Class) Bartl. (1830)	Ref: A. Novikoff & B. Barabasz-Krasny, 2015: 45.
Lycopsida (Class)	Ref: T.N. Taylor et al., 2009: table (p. 266), App. 1 (p. 1028).
Lycopodiopsida (Class) Bartl. (1830)	Ref: D.J. Mabberley, 2008: 506.
†Drepanophycopsida (Class) R.J. Rayner (1984)	Ref: A.B. Doweld, 2001: II.
Lycopsida (Class)	Ref: P. Kenrick & P.R. Crane, 1997a: table 7.1 (p. 228).
Lycopsida (Class)	Ref: C.J. Cleal & B.A. Thomas, 1995: 13.

Number of Subtaxa

2025	Available in Systema Naturae 2000	†10f;27g;2s
1989-present	Systema Naturae 2000: 16 Feb 2023	[; †10f;27g]
2015	A. Novikoff & B. Barabasz-Krasny: 46	[; †10f;27g]
2001	A.B. Doweld: II	[; †4f]
1995	C.J. Cleal & B.A. Thomas: 13	[; †2f]