The Interatheriinae (Mammalia, Notoungulata) of the Friasiansensu strictoand Mayoan (middle to late Miocene), and the fossils from Cerro Zeballos, Patagonia, Argentina

The middle to late Miocene Friasian sensu stricto, Colloncuran and Mayoan South American Land Mammal Ages (SALMAs) were established based on the mammals recovered from the Río Frías, Collón Curá and Río Mayo formations, respectively (southern Argentina and Chile). Records of Interatheriinae (Notoungulata) from these sediments have been known since the first contributions of Ameghino and Roth, but most of this material has only been superficially...