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Deltatheridium

Deltatheridium
Temporal range: Late Cretaceous
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Infraclass: Metatheria
Order: Deltatheroida
Family: Deltatheridiidae
Genus: Deltatheridium
Gregory & Simpson, 1926
Species
  • Deltatheridium pretrituberculare
  • Deltatheridium nessovi

Deltatheridium (meaning triangle beast or delta beast) is an extinct species of metatherian. It lived in what is now Mongolia during the Upper Cretaceous, circa 80 million years ago. It was a basal metatherian, which places it near start of the lineage that led to the marsupials, such as kangaroos, wallabies, koalas, and opossums.

It had a length of 15 cm (5.9 in). Its teeth indicate it was carnivorous. One specimen of Archaeornithoides might attest an attack by this mammal, the skull bearing tooth marks that match its teeth.


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Wikipedia

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