Concise hierarchy

(Kingdom) Plantae - (Phylum) Tracheophyta

Current position

Spermatophytina (Subphylum) Caval.-Sm. (1998)

Ref: M.A. Ruggiero et al., 2015b: table 2 (p. 34). [implicit]

Alternative positions

Cycadophyta (Division) Bessey (1907)	Ref: Новіков, А. & Барабаш-Красни, Б. / Novikoff, A. & Barabasz-Krasny, B., 2015: 58.
Cycadophyta (Phylum) Bessey (1907)	Ref: A.B. Doweld, 2001: XV.
Gymnospermae (Infraphylum) auct.	Ref: C.J. Cleal & B.A. Thomas, 1995: 13. [indirect]
Gymnospermae ([unranked]) Lindl.	Ref: D.J. Mabberley, 2008: 929.
Gymnospermae (Superclass)	Ref: M.A. Ruggiero et al., 2015b: table 2 (p. 34).
Gymnospermophyta (Division) Cleal (1994)	Ref: C.J. Cleal & B.A. Thomas, 1995: 13.
Pinophyta (Phylum) Cronquist, Takht. & Zimmerm. ex Reveal (1996)

Historical positions

Gymnospermae (Superclass)	Ref: M.A. Ruggiero et al., 2015b: table 2 (p. 34).
Cycadophyta (Division) Bessey (1907)	Ref: A. Novikoff & B. Barabasz-Krasny, 2015: 58.
Gymnospermae ([unranked]) Lindl.	Ref: D.J. Mabberley, 2008: 242-243, 929.
Cycadophyta (Phylum) Bessey (1907)	Ref: A.B. Doweld, 2001: XV.
Gymnospermophyta (Division) Cleal (1994)	Ref: C.J. Cleal & B.A. Thomas, 1995: 13.
Gymnospermae (Division)	Ref: R.C. van Caenegem et al., 1979-1984

Number of Subtaxa

2024	Available in Systema Naturae 2000	2o;2f;10g;12s; †1o;2f;12g;2s
1989-present	Systema Naturae 2000: 20 Apr 2023	[2o;2f;10g; †1o;2f]
2015b	M.A. Ruggiero et al.: table 2 (p. 34)	[1o]
2015	A. Novikoff & B. Barabasz-Krasny: 58	[2o;2f;10g; †1o;2f;11g]
2008	D.J. Mabberley: 242	1o;2f;11g;210s
2001	A.B. Doweld: XV	[4o;6f; †1o;2f]
1995	C.J. Cleal & B.A. Thomas: 14	[1o;1f; †1o;2f]