Concise hierarchy
	(Kingdom) Animalia - (Phylum) Chordata - (Class) Reptilia - (Order) Pelecaniformes - (Family) Pelecanidae
Original position
Current position
	Alternative positions
	
			Historical positions
			
				
					| Pelecanidae (Family) Rafinesque, 1815 | Ref: 
							
								E.C. Dickinson, 2003: 89. | 
					
						| Pelecanidae (Family) Rafinesque, 1815 | Ref: 
								
									J. van der Land, 2001: 375. | 
						
							| Pelecaninae (Subfamily) | Ref: 
									
										B.L. Monroe Jr. & C.G. Sibley, 1993: 132. | 
							
								| Pelecanidae (Family) Rafinesque, 1815 | Ref: 
										
											C.M. Perrins, 1991 (1990): 367. | 
								
									| Pelecanidae (Family) Rafinesque, 1815 | Ref: 
											
												W.J. Bock, 1982: 972. | 
									
										| Pelecanidae (Family) Rafinesque, 1815 | Ref: 
												
													E. Mayr & G.W. Cottrell, 1979 | 
										
											| Pelecanidae (Family) Rafinesque, 1815 | Ref: 
													
														T.I. Storer et al., 1979 | 
											
												| Pelecanidae (Family) Rafinesque, 1815 | Ref: 
														
															B. Grzimek et al., 1973 (1968): 573. | 
												
													| Pelecanidae (Family) Rafinesque, 1815 | Ref: 
															
																P. Brodkorb, 1963: 265. | 
													
														| Anseres (Order) Linnaeus, 1758 | Ref: 
																
																	C. a Linné, 1766: 118, 215. | 
														
															| Anseres (Order) Linnaeus, 1758 | Ref: 
																	
																		C. Linnaeus, 1758: 84, 132. | 
														
														Number of Subtaxa