The Steropodontidae was a possible family of monotremes that are known from fossils from the Cretaceous of Australia.

Temporal range: Early Cretaceous,123–96 Ma
Steropodon BW.jpg
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Monotremata
Family: Steropodontidae
Archer, Flannery, Ritchie, & Jones, 1995

There are two genera placed in this family: Steropodon and Teinolophos, which have been tentatively placed in the family due to the similarity of the lower molars in these two genera. However, the latter may be more basal.[1]


  1. ^ Thomas H. Rich, James A. Hopson, Pamela G. Gill, Peter Trusler, Sally Rogers-Davidson, Steve Morton, Richard L. Cifelli, David Pickering, Lesley Kool, Karen Siu, Flame A. Burgmann, Tim Senden, Alistair R. Evans, Barbara E. Wagstaff, Doris Seegets-Villiers, Ian J. Corfe, Timothy F. Flannery, Ken Walker, Anne M. Musser, Michael Archer, Rebecca Pian and Patricia Vickers-Rich (2016). "The mandible and dentition of the Early Cretaceous monotreme Teinolophos trusleri". Alcheringa: An Australasian Journal of Palaeontology. in press. doi:10.1080/03115518.2016.1180034.
  • Rich et al. 2001. Monotreme nature of the Early Cretaceous mammal Teinolophos. Acta Palaeontologica Polonica. 46:113-118

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