Chasicotherium

Chasicotherium is an extinct genus of a large notoungulate mammal known originally from a partial skull with mandible discovered in the Arroyo Chasicó Formation, in the stream of the same name of the Party of Villarino, Province of Buenos Aires, Argentina. The sediments in which the animal remains were discovered date to 10 to 9 million years (Chasicoan). It is known only from its type species, "C. rothi". Its weight was approximately , being the largest and most recent member of the family Homalodotheriidae. It was a great herbivore of the Miocene Pampas, closely related with "Homalodotherium", with it shares the reduced dental formula and the short premaxilla.