Concise hierarchy
	(Kingdom) Animalia - (Phylum) Chordata - (Class) Mammalia - (Order) Alphadontia - (Family) Alphadontidae
Subsequent positions
Current position
	Alternative positions
	
		Historical positions
		
			
				| †Alphadontidae (Family) Marshall, Case & Woodburne, 1990 | 
					Ref: 
						
							L.M. Carneiro et al., 2018: fig. 5.
						 | 
				
				
					| †Alphadontidae (Family) Marshall, Case & Woodburne, 1990 | 
						Ref: 
							
								Z. Kielan-Jaworowska et al., 2004: table 12.1 (p. [443]).
							 | 
					
					
						| Metatheria (Infraclass) Huxley, 1880 | 
							Ref: 
								
									Z. Kielan-Jaworowska et al., 2004 (alt.): fig. 3.25.
								 | 
						
						
							| †Alphadontinae (Subfamily) Marshall, Case & Woodburne, 1990 | 
								Ref: 
									
										M.C. McKenna & S.K. Bell, 1997: 69.
									 | 
							
						
						Number of Subtaxa