Mammalia - Theriamorpha - Alphadontidae
Alternative spelling: Alphadontinae
Parent taxon: Marsupialiformes according to G. P. Wilson et al. 2016
See also Davis 2007, Johanson 1995 and Kielan-Jaworowska et al. 2004
Sister taxa: Adelodelphys, Anchistodelphys, Arcantiodelphys, Archimetatheria, Asiatherium, Bistius, Dakotadens, Iugomortiferum, Kokopellia, Marsupialia, Pediomyoidea, Polydolopimorphia, Protalphadon, Sinbadelphys, Sparassodonta, Stagodontidae
Subtaxa: Albertatherium Alphadon Eoalphadon Turgidodon Varalphadon
Ecology: scansorial omnivore
Distribution:
• Eocene of Algeria (1 collection)
• Paleocene of United States (1: Montana)
• Cretaceous of Canada (29: Alberta, Saskatchewan), Mexico (1), Portugal (1), United States (128: Montana, New Mexico, North Dakota, South Dakota, Texas, Utah, Wyoming)
Total: 161 collections including 222 occurrences