Archaeohyrax

Archaeohyrax is a genus of extinct, notoungulate mammal known from the Middle Eocene to Oligocene of Argentina and Bolivia.
Description.
The holotype of the type species, "A. patagonicus", is a skull with a tall, blunt muzzle, and high-crowned cheek teeth. If the skull is compared to those of the superficially similar hyraxes, the remains suggest a small animal about long. Fossils of "Archaeohyrax" have been found in the Sarmiento, Agua de la Piedra, and Deseado Formations of Argentina and the Salla Formation of the Salla-Luribay Basin of Bolivia.