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Temporal range: middle Cretaceous
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Multituberculata
Suborder: Plagiaulacida
Family: incertae sedis
Genus: Janumys
Eaton and Cifelli, 2001

J. erebos Eaton and Cifelli, 2001 (type)

Janumys is a genus of extinct mammal of the middle Cretaceous. It was a member of the order of Multituberculata (also extinct). It lived in North America during the Mesozoic era, also known as the "age of the reptiles." It has been provisionally placed within the informal suborder "Plagiaulacida".

The type species, Janumys erebos, was found in the Albian-Cenomanian, Lower-Upper Cretaceous boundary of the Cedar Mountain Formation in Utah (United States).


  • Eaton and Cifelli (2001), Multituberculate mammals from near the Early-Late Cretaceous boundary, Cedar Mountain Formation, Utah. Acta Palaeontologica Polonica 46 (4), p. 453-518.