Concise hierarchy
	(Kingdom) Animalia - (Phylum) Chordata - (Class) Mammalia - (Order) Pilosa - (Family) Megatheriidae
Original position
Original entries
	
		| †Chasicobradys (Genus) Scillato-Yane, Carlini & Vizcaino, 1987 |  | 
			Ref: M.C. McKenna & S.K. Bell, 1997: 98. | 
	
	
		| †Diheterocnus (Genus) Kraglievich, 1928 |  | 
			Ref: M.C. McKenna & S.K. Bell, 1997: 98. | 
	
	
		| †Gilsolaresia (Genus) Roselli, 1976 |  | 
			Ref: M.C. McKenna & S.K. Bell, 1997: 98. | 
	
	
		| †Nothropus (Genus) Burmeister, 1882 |  | 
			Ref: M.C. McKenna & S.K. Bell, 1997: 98. | 
	
	
		| Nothrotheriops (Genus) Hoffstetter, 1955 |  | 
			Ref: M.C. McKenna & S.K. Bell, 1997: 98. | 
	
	
		| Nothrotherium (Genus) Lydekker, 1889 |  | 
			Ref: M.C. McKenna & S.K. Bell, 1997: 98. | 
	
	
		| †Pronothrotherium (Genus) Ameghino, 1907 |  | 
			Ref: M.C. McKenna & S.K. Bell, 1997: 98. | 
	
	
		| †Synhapalops (Genus) Kraglievich, 1930 |  | 
			Ref: M.C. McKenna & S.K. Bell, 1997: 98. | 
	
	
		| †Thalassocnus (Genus) de Muizon & McDonald, 1995 |  | 
			Ref: M.C. McKenna & S.K. Bell, 1997: 98. | 
	
	
		| †Xyophorus (Genus) Ameghino, 1887 |  | 
			Ref: M.C. McKenna & S.K. Bell, 1997: 98. | 
	
Current position
	Historical positions
	
		Number of Subtaxa