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Temporal range: Upper CretaceousEocene
70.6–33.9 mya
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Infraclass: Allotheria
Suborder: Gondwanatheria

Gondwanatheria is an extinct group of mammals that lived during the Upper Cretaceous to the end of the Eocene. They lived in the Southern Hemisphere continents which had been part of the supercontinent Gondwana.

These mammals are known only from isolated teeth and a few lower jaws. Because of these fragmentary remains, their relationships are unclear.

Fossils have come from South America, India and Antarctica, where gondwanatherids once lived in the lush forests of the Eocene. Climate changes at the Eocene–Oligocene boundary may have caused their extinction.

  • Reguero M.A., Sergio A.M. and Santillana S.N. 2002. Antarctic peninsula and South America (Patagonia) Paleogene terrestrial faunas and environments: biogeographic relationships. Palaeogeography-Palaeoclimatology-Palaeoecology 179, pages 189–210.