Concise hierarchy
	(Kingdom) Animalia - (Phylum) Chordata - (Class) Mammalia
Subsequent positions
Original entries
Current position
	Alternative positions
	
		Historical positions
		
			
				| Theriiformes (Division) Rowe, 1988 | 
					Ref: 
						
							M.J. Benton, 2015: 443.
						 | 
				
				
					| Theriiformes (Division) Rowe, 1988 | 
						Ref: 
							
								M.J. Benton, 2005: 400, box 10.3.
							 | 
					
					
						| †Symmetrodontans (Order) Simpson, 1925 | 
							Ref: 
								
									Z. Kielan-Jaworowska et al., 2004: table 9.2 (p. 345).
								 | 
						
						
							| Holotheria (Infraclass) Wible, Rougier, Novacek, McKenna & Dashzeveg, 1995 | 
								Ref: 
									
										M.C. McKenna & S.K. Bell, 1997: 43.
									 [new position] | 
							
						
						Number of Subtaxa