Concise hierarchy
	(Kingdom) Animalia - (Phylum) Cnidaria
Current position
	Alternative positions
	
			Historical positions
			
				
					| Anthozoa (Subphylum) Ehrenberg, 1831 | 
						Ref: 
							
								M.A. Ruggiero et al., 2015b: table 2 (p. 34).
							 | 
					
					
						| Cnidaria (Phylum) Hatschek, 1888 | 
							Ref: 
								
									B.C. Das, 2007: 20.
								 | 
						
						
							| Cnidaria (Phylum) Hatschek, 1888 | 
								Ref: 
									
										E.E. Ruppert et al., 2004: 124-148, fig. 7.75A-B.
									 | 
							
							
								| Cnidaria (Phylum) Hatschek, 1888 | 
									Ref: 
										
											J.J. Sepkoski Jr., 2002: 50.
										 | 
								
								
									| Cnidaria (Phylum) Hatschek, 1888 | 
										Ref: 
											
												C. Nielsen, 2001: fig. 8.2.
											 | 
									
									
										| Cnidaria (Phylum) Hatschek, 1888 | 
											Ref: 
												
													M.J. Costello et al., 2001: 104.
												 | 
										
										
											| Coelenterata (Phylum) Leuckart, 1847 | 
												Ref: 
													
														1998
													 | 
											
											
												| Cnidaria (Phylum) Hatschek, 1888 | 
													Ref: 
														
															C. Nielsen, 1995
														 | 
												
												
													| Cnidaria (Phylum) Hatschek, 1888 | 
														Ref: 
															
																S. Bengtson, 1992: table 23.5 (p. 1020).
															 | 
													
													
														| Cnidaria (Phylum) Hatschek, 1888 | 
															Ref: 
																
																	R.C. Brusca & G.J. Brusca, 1990
																 | 
														
														
															| Cnidaria (Phylum) Hatschek, 1888 | 
																Ref: 
																	
																		R.S. Boardman et al., 1987
																	 | 
															
															
																| Cnidaria (Phylum) Hatschek, 1888 | 
																	Ref: 
																		
																			D.F. Dunn, 1982: 686.
																		 | 
																
																
																	| Cnidaria (Phylum) Hatschek, 1888 | 
																		Ref: 
																			
																				L. Margulis & K.V. Schwartz, 1982: 170.
																			 | 
																	
																	
																		| Cnidaria (Phylum) Hatschek, 1888 | 
																			Ref: 
																				
																					T.I. Storer et al., 1979: 320.
																				 | 
																		
																		
																			| Cnidaria (Phylum) Hatschek, 1888 | 
																				Ref: 
																					
																						I. Eibl-Eibesfeldt et al., 1975 (1971): 593.
																					 | 
																			
																			
																				| Nematophora (Phylum) Huxley, 1850 | 
																					Ref: 
																						
																							E.R. Lankester, 1877: 443.
																						 | 
																				
																			
																			Number of Subtaxa