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Temporal range: Early Cretaceous
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Subclass: Australosphenida
Order: Ausktribosphenida
Family: Ausktribosphenidae
Genus: Ausktribosphenos
Species: A. nyktos
Binomial name
Ausktribosphenos nyktos
Rich et al, 1997

Ausktribosphenos is an extinct genus of mammals from Early Cretaceous of Australia. The only recorded species, Ausktribosphenos nyktos, was found on Flat Rocks, Victoria.


  • Rich, T.H., Vickers-Rich, P., Constantine, A., Flannery, T.F., Kool, L. & van Klaveren, N. 1997. A Tribosphenic Mammal from the Mesozoic of Australia. Science 278: 1438-1442.