Genus: Gondwanatherium BONAPARTE, 1986
Etymology: In reference to the ancient southern continent of Gondwana, comprising Africa, South America, Antarctica, Australia, and India, and Greek, therion, “beast, mammal”: Gondwana beast.

Species: patagoniuum BONAPARTE, 1986
Etymology: In reference to Patagonia, Argentina.

Holotype: MACN-RN 22

Locality: Estancia Los Alamitos, Arroyo Verde, Rio Negro Province, Patagonia, Argentina.

Horizon: Middle levels of the Los Alamitos Formation.


Age: Allenian Tetrapoda Assemblage, Late Campanian-Early Maastrichtian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: ?Upper molar.

Referred specimens:

MACN-RN 23, Molar or premolar.

MACN-RN 24: Molar.

MACN-RN 25: An anteroposteriorly sectioned molar or premolar.