Concise hierarchy

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

Current position

Polypodiidae (Subclass) Cronquist, Takht. & Zimmerm. (1966)

Ref: PPG I, 2016: 572.

Alternative positions

Hymenophyllopsida (Class) Doweld (2001)	Ref: A.B. Doweld, 2001: IX. [new position]
Polypodinae (Class)	Ref: L.J. Audus & V. Heywood, 1981: 1246.
Polypodiopsida (Class) Cronquist, Takht. & Zimmerm. (1966)	Ref: Новіков, А. & Барабаш-Красни, Б. / Novikoff, A. & Barabasz-Krasny, B., 2015: 49.

Historical positions

Polypodiidae (Subclass) Cronquist, Takht. & Zimmerm. (1966)	Ref: D.J. Mabberley, 2017: App. (p. 998).
Polypodiidae (Subclass) Cronquist, Takht. & Zimmerm. (1966)	Ref: PPG I, 2016: 572-573.
Polypodiidae (Subclass) Cronquist, Takht. & Zimmerm. (1966)	Ref: M.A. Ruggiero et al., 2015b: table 2 (p. 32).
Polypodiopsida (Class) Cronquist, Takht. & Zimmerm. (1966)	Ref: A. Novikoff & B. Barabasz-Krasny, 2015: 49.
Polypodiopsida (Class) Cronquist, Takht. & Zimmerm. (1966)	Ref: D.J. Mabberley, 2008: 928.
Polypodiopsida (Class) Cronquist, Takht. & Zimmerm. (1966)	Ref: A.R. Smith et al., 2006: 710, fig. 2; 726.
Polypodiidae (Subclass) Cronquist, Takht. & Zimmerm. (1966)	Ref: K.M. Pryer et al., 2004: fig. 10.5B.
Hymenophyllopsida (Class) Doweld (2001)	Ref: A.B. Doweld, 2001: IX. [new position]
Polypodinae (Class)	Ref: L.J. Audus & V. Heywood, 1981: 1246.

Number of Subtaxa

2024	Available in Systema Naturae 2000	1f;9g;2s; †1g
1989-present	Systema Naturae 2000: 16 Jun 2023	[1f;9g; †1g]
2017	D.J. Mabberley: 456, App. (p. 998)	[1f;9g;1000s]
2016	PPG I: 573	[1f;9g]
2015	A. Novikoff & B. Barabasz-Krasny: 49	[1f;9g; †1g]
2008	D.J. Mabberley	[1f;9g;700s]
2006	A.R. Smith et al.: 710	[1f;9g;~600s]
2001	A.B. Doweld: IX	[1f; †1f]
1981	L.J. Audus & V. Heywood	[2f;39g]