''Archaeotypotherium'' is an

extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

genus of notoungulate belonging to the family

Archaeohyracidae Archaeohyracidae is an extinct family of notoungulate mammals known from the Paleocene through the Oligocene of South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a ...

that lived during the Oligocene of Argentina and Chile. It was first described in 1903 by the Argentine paleontologist Santiago Roth.Roth S. (1903) Noticias preliminares sobre nuevos mamíferos fósiles del Cretáceo superior y Terciario inferior de la Patagonia. Revista del Museo de La Plata 11: 133-158

References

{{Taxonbar, from=Q17621523 Typotheres Oligocene mammals of South America Paleogene Argentina Fossils of Argentina Paleogene Chile Fossils of Chile Deseadan Tinguirirican Fossil taxa described in 1903 Prehistoric placental genera Sarmiento Formation Golfo San Jorge Basin