Alphadontidae Temporal range: Late Cretaceous,[1] 99.6–66.0 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Reconstruction of Alphadon sp.
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Clade:	Marsupialiformes
Family:	†Alphadontidae Marshall et al. 1990
Genera
Albertatherium Alphadon Eoalphadon Turgidodon

Alphadontidae was a family of mammals belonging to the clade Metatheria, the group of mammals that includes modern-day marsupials.