Mesotheriidae is an extinct family of notoungulate mammals known from the Eocene through the Pleistocene of South America. Mesotheriids were small to medium-sized herbivorous mammals adapted for digging.
Rodcania is an extinct genus of mammal, belonging to the order Xenungulata. It contains a single species, Rodcania kakan, which lived during the Paleocene. Its remains were found in South America. The genus name is an anagram of Carodnia.
Punahyrax is an extinct genus of placental mammal belonging to the family Archaeohyracidae, within the order Notoungulata, and endemic of South America. Its fossilized remains were discovered in Argentina, and were found in the Geste Formation, near Antofagasta de la Sierra in the Catamarca Province, and in the Pozuelos Formation in the Salta Province. Those sites are considered to represent a fauna dated from the Mustersan, the South American Late Eocene.
Otrhonia is an extinct genus of notoungulate, belonging to the Notostylopidae family. It lived during the Late Eocene, and its remains were discovered in South America.
Henricosbornia is an extinct genus of Notoungulate. It lived from the Late Paleocene to the Middle Eocene, in what is today South America.
Transpithecus is an extinct genus of Notoungulates, belonging to the suborder Typotheria. It lived during the Middle Eocene in what is today South America.
Periphragnis is an extinct genus of isotemnid notoungulates that lived from the Middle Eocene to the Early Oligocene in what is now Argentina and Chile.
Pleurostylodon is an extinct genus of notoungulate belonging to the family Isotemnidae. It lived during the Middle Eocene, in what is now Argentina.
Eurygenium is an extinct genus of notoungulate belonging to the family Notohippidae. It lived during the Late Oligocene in what is today South America.
Coquenia is an extinct genus of Notoungulate, belonging to the family Leontiniidae. It lived during the Middle Eocene, in what is today Argentina.
Martinmiguelia is an extinct genus of Notoungulate, belonging to the family Leontiniidae. It lived during the Middle Eocene, and its fossil remains were found in South America.
Termastherium is an extinct genus of Notoungulate, belonging to the family Leontiniidae. It lived during the Early Oligocene, and its fossilized remains were found in South America.
Archaeopithecus is an extinct genus of Notoungulate, belonging to the suborder Typotheria. It lived during the Middle Eocene, in what is today Argentina.
Teratopithecus is an extinct genus of Notoungulate, potentially belonging to the suborder Typotheria. It lived during the Early Eocene, and its fossilized remains were discovered in South America.
Colbertia is an extinct genus of oldfiethomasiid notoungulate. It lived from the Early to the Middle Eocene, and its fossilized remains were discovered in Argentina and Brazil.
Argyrohyrax is an extinct genus of interatheriid notoungulate that lived during the Late Oligocene, of what is now Argentina and Bolivia.
Santiagorothia is an extinct genus of interatheriid notoungulate. It lived during the Early Oligocene, and its fossils were discovered in Argentina and Chile.
Notopithecus is an extinct genus of Notoungulate, belonging to the suborder Typotheria. It lived from the Middle to the Late Eocene and its fossilized remains were discovered in South America.
Archaeogaia is an extinct genus of mammal, belonging to the order Notoungulata, who lived from the Early to the Middle Paleocene in South America. It is one of the oldest known notoungulates.
Boleatherium is an extinct genus of interatheriid notoungulate that lived from the Early to Middle Miocene of what is now Argentina. Fossils of this genus have been found in the Cerro Boleadoras Formation, the formation which this genus was named after.
