Axestemys is an extinct genus of softshell turtle that lived from the Late Cretaceous to the Eocene in western North America and Europe.
Campanorco is an extinct genus of notoungulate mammal from the Middle Eocene Lumbrera Formation, Argentina, South America and the only member of the family Campanorcidae.
The Casamayoran age is a period of geologic time within the Early Eocene epoch of the Paleogene, used more specifically within the South American land mammal age (SALMA) classification. It follows the Itaboraian and precedes the Mustersan age.
Griphotherion is an extinct genus of notoungulate mammal from the Eocene of Argentina. A fossil skeleton was found in the Lumbrera Formation and described in 2011 as the holotype of the type species G. peiranoi.
Gandheralophus is an extinct genus of isectolophid perissodactyl mammal known from the Eocene of Pakistan, with two known species: G. minor and G. robustus, both described in 2012.
Albertogaudrya is an extinct genus of astrapotherian mammal that lived in present-day Salta, Argentina during the Eocene 48.6 to 37.2 million years ago. Fossils of Albertogaudrya have been found in the Lumbrera and Sarmiento Formations. It is named after French palaeontologist Albert Gaudry.
Didolodontidae is a possibly paraphyletic family of "condylarth" mammals known from the Paleogene of South America, with most specimens known from Argentina. They were generally small-medium in body size, and had a bunodont dentition. A close relationship with litopterns has been suggested by some studies. They range in age from the early Paleocene (Selandian/Peligran) to late Eocene (Priabonian/Mustersan). The attribution of Salladolodus deuterotheroides from the Late Oligocene of Bolivia to the family is doubtful.
Eorpidae is a small family of extinct insects in the scorpionfly order, Mecoptera, which contains a single genus, Eorpa. Three Eocene age species found in Western North America have been placed into the genus: E. elverumi, E. jurgeni, and E. ypsipeda.
Salta Basin or Salta Rift Basin is a sedimentary basin located in the Argentine Northwest. The basin started to accumulate sediments in the Early Cretaceous (Neocomian) and at present it has sedimentary deposits reaching thicknesses of 5,000 metres (16,000 ft). The basin contains seven sub-basins: Tres Cruces, Lomas de Olmedo, Metán, Alemanía, Salfity, El Rey, Sey and Brealito. The basin environment has variously been described as a "foreland rift" and an "intra-continental rift". The basin developed under conditions of extensional tectonics and rift-associated volcanism.
Utaetus is an extinct genus of mammal in the order Cingulata, related to the modern armadillos. The genus contains two species, Utaetus buccatus and U. magnum. It lived in the Late Paleocene to Late Eocene and its fossil remains were found in Argentina and Brazil in South America.
The Geste Formation is a fossiliferous geologic formation of the Puna Plateau in the western Salta Province and northern Catamarca Province of the Argentine Northwest, northwestern Argentina.
Simpsonotus is an extinct genus of notoungulate mammals in the family Henricosborniidae from the Middle to Late Paleocene of South America. Fossils of the genus have been found in the Mealla Formation, a fluvial and lacustrine sedimentary unit of the Salta Basin in northwestern Argentina. The genus name honors paleontologist George Gaylord Simpson.
Saltaodus is an extinct genus of mammals, belonging to the family Didolodontidae. It lived during the Late Eocene, in what is now South America.
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.
Isotemnus is an extinct genus of notoungulate belonging to the family Isotemnidae. It lived from the Late Paleocene to the Middle Eocene of what is now Argentina.
Pleurostylodon is an extinct genus of notoungulate belonging to the family Isotemnidae. It lived during the Middle Eocene, in what is now Argentina.
Coquenia is an extinct genus of Notoungulate, belonging to the family Leontiniidae. It lived during the Middle Eocene, in what is today Argentina.
Colbertia is an extinct genus of oldfieldthomasiid notoungulate. It lived from the Early to the Middle Eocene, and its fossilized remains were discovered in Argentina and Brazil.
Callistoe is an extinct genus of sparassodont. It lived during the Early Eocene, and its fossilized remains were found in South America.
Phocavis is an extinct genus of flightless seabird, belonging to the family Plotopteridae, and distantly related with modern cormorants. Its fossils, found in the Keasey Formation in Oregon, are dated from the Late Eocene.
