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Temporal range: Late Cretaceous
An artist's illustration of Alphadon
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Superorder: Metatheria
Family: Alphadontidae
Genus: Alphadon
Referred species
  • Alphadon attaragos (Lillegraven & McKenna, 1986)
  • Alphadon clemensi (Eaton, 1993)
  • Alphadon eatoni (Cifelli & Muizon, 1998)
  • Alphadon halleyi (Sahni, 1972)
  • Alphadon lillegraveni (Eaton, 1993)
  • Alphadon marshi (Simpson, 1927) (type)
  • Alphadon perexiguus (Cifelli, 1994)
  • Alphadon sahnii (Lillegraven & McKenna, 1986)
  • Alphadon wilsoni (Lillegraven, 1969)

Alphadon is a small prehistoric marsupial that appeared in film Walking with Dinosaurs: Walking with Dinosaurs 3D. It is seen being chased by an inquisitive baby Pachyrhinosaurus.


As a metathere mammal, it was related to Didelphodon and the modern marsupials; it was small in size and probably similar to the modern opossum of North America.

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