Concise hierarchy
	(Kingdom) Animalia - (Phylum) Chordata - (Class) Reptilia - (Order) Anseriformes - (Family) Anatidae
Original position
Current position
	Alternative positions
	
			Historical positions
			
				
					| Neornithes (Clade) Gadow, 1893 | Ref: 
							
								J.K. O'Connor et al., 2010: fig. 9.
							 [rough position] | 
					
						| Anatinae (Subfamily) Vigors, 1825 | Ref: 
								
									E.C. Dickinson, 2003: 66. | 
						
							| Ornithurae (Clade) Haeckel 1866 [Gauthier 1986] {Chiappe 1991} | Ref: 
									
										L.M. Chiappe, 2001: [126] (fig. 1).
									 [rough position] | 
							
								| Anatini (Tribe) Vigors, 1825 | Ref: 
										
											B.L. Monroe Jr. & C.G. Sibley, 1993: 16. | 
								
									| Anatinae (Subfamily) Vigors, 1825 | Ref: 
											
												C.M. Perrins, 1991 (1990): 369. | 
									
										| Anatidae (Family) Vigors, 1825 | Ref: 
												
													W.J. Bock, 1982: 976.
												 [rough position] | 
										
											| Chordata (Phylum) Bateson, 1885 | Ref: 
													
														L. Margulis & K.V. Schwartz, 1982: 238.
													 [rough position] | 
											
												| Anatinae (Subfamily) Vigors, 1825 | Ref: 
														
															E. Mayr & G.W. Cottrell, 1979 | 
												
													| Anatidae (Family) Vigors, 1825 | Ref: 
															
																T.I. Storer et al., 1979 | 
													
														| Anatini (Tribe) Vigors, 1825 | Ref: 
																
																	B. Grzimek et al., 1973 (1968): 579. | 
														
															| Anatinae (Subfamily) Vigors, 1825 | Ref: 
																	
																		P. Brodkorb, 1964: 220. | 
															
																| Anseres (Order) Linnaeus, 1758 | Ref: 
																		
																			C. a Linné, 1766: 118, 194. | 
																
																	| Anseres (Order) Linnaeus, 1758 | Ref: 
																			
																				C. Linnaeus, 1758: 84, 122. | 
																
																Number of Subtaxa