Concise hierarchy
	(Kingdom) Animalia - (Phylum) Chordata - (Class) Myxini - (Order) Myxiniformes
Current position
	Alternative positions
	
				Historical positions
				
					
						| Myxiniformes (Order) | 
							Ref: 
								
									R. van der Laan, 2018: 15.
								 | 
						
						
							| Myxiniformes (Order) | 
								Ref: 
									
										J.S. Nelson et al., 2016: 20.
									 | 
							
							
								| Myxiniformes (Order) | 
									Ref: 
										
											W.N. Eschmeyer, 2004-2016: 24 Jan 2006.
										 | 
								
								
									| Myxiniformes (Order) | 
										Ref: 
											
												W.N. Eschmeyer & J.D. Fong, 2011: 26.
											 | 
									
									
										| Myxiniformes (Order) | 
											Ref: 
												
													J.S. Nelson, 2006: 22.
												 | 
										
										
											| Myxiniformes (Order) | 
												Ref: 
													
														N. Bailly et al., 2001: 358.
													 | 
											
											
												| Myxiniformes (Order) | 
													Ref: 
														
															2000
														 | 
												
												
													| Myxiniformes (Order) | 
														Ref: 
															
																W.N. Eschmeyer, 1998: [2449].
															 | 
													
													
														| Myxiniformes (Order) | 
															Ref: 
																
																	R.L. Carroll, 1988: 596.
																 | 
														
														
															| Myxiniformes (Order) | 
																Ref: 
																	
																		R.A. Fritzsche & L. Fuiman, 1982: 831.
																	 | 
															
															
																| Myxini (Subclass) Jaekel, 1911 | 
																	Ref: 
																		
																			B. Grzimek et al., 1974: 531.
																		 | 
																
																
																	| Hyperotreta (Order) | 
																		Ref: 
																			
																				D.S. Jordan, 1923: 82.
																			 | 
																	
																
																Number of Subtaxa