Classification of Johanson 1996
Fm. Didelphidae Gray 1821 [opossum]
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G. †Varalphadon Johanson 1996
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†Varalphadon creber Fox 1971
†Varalphadon crebreforme Cifelli 1990
†Varalphadon wahweapensis Cifelli 1990
G. †Alphadon Simpson 1927
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Invalid names: Alphadon parapraesagus Rigby, Jr. and Wolberg 1987 [nomen dubium]
G. †Protalphadon Cifelli 1990
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†Protalphadon foxi Johanson 1996
†Protalphadon lulli Clemens 1966
G. †Turgidodon Cifelli 1990
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†Turgidodon praesagus Russell 1952
†Turgidodon rhaister Clemens 1966
†Turgidodon russelli Fox 1979
†Alphadon halleyi Sahni 1972
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Invalid names: Alphadon sahnii Lillegraven and McKenna 1986 [synonym]
†Alphadon marshi Simpson 1927
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Invalid names: Alphadon wilsoni Lillegraven 1969 [synonym]