Concise hierarchy
	(Kingdom) Plantae - (Phylum) Tracheophyta - (Class) Polypodiopsida
Subsequent positions
Current position
	Alternative positions
	
					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: 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. | 
											
												| Leptosporangiatae (Clade) Bessey 1907 [Cantino & Donoghue 2007] | Ref: 
														
															P.D. Cantino et al., 2007: E16.
														 [new position] | 
												
													| 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. | 
														
															| Gleicheniopsida (Class) Doweld (2001) | Ref: 
																	
																		A.B. Doweld, 2001: IX.
																	 [new position] | 
															
																| Polypodinae (Class) | Ref: 
																		
																			L.J. Audus & V. Heywood, 1981: 1246. | 
															
															Number of Subtaxa