†family Alphadontidae Marshall et al. 1990

Mammalia - Tribosphenida - 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

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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

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