Classification
Ernestokokenia was a member of the Didolodontidae, an enigmatic clade of south-american mammals typicals of the early Cenozoic, of uncertain relationships. The first fossils of this animal were found in the Chubut Province in Patagonia (Argentina), in soils dated from the Middle Eocene, and were described by Florentino Ameghino in 1901. The type species is Ernestokokenia nitida. Ameghino described also Notoprotogonia patagonica and Euprotogonia trigonalis, later attributed to the genus by George Gaylord Simpson in 1948. In 1935, Simpson had described two other species, Ernestokokenia chaishoer and E. yurunhor, from the same Chubut Province, and from the Lower Eocene. Other fossils dubiously attributed to the genus have been found in soils of the Upper Paleocene of Argentina and the Eocene of Chile.
Xenungulata is an order of extinct and primitive South American hoofed mammals that lived from the Late Paleocene to Early Eocene. Fossils of the order are known from deposits in Brazil, Argentina, Peru, and Colombia. The best known member of this enigmatic order is the genus Carodnia, a tapir-like and -sized animal with a gait similar to living African elephants.
Didolodontidae is a possibly paraphyletic family of "condylarth" mammals known from the Paleocene to the late Eocene of South America.
Lamegoia is an extinct genus of mammals, belonging to the family Didolodontidae. It contains a single species, Lamegoia conodonta, which lived during the Late Paleocene in what is now South America.
Saltaodus is an extinct genus of mammals, belonging to the family Didolodontidae. It lived during the Late Eocene, in what is now South America.
Paulogervaisia is an extinct genus of mammal, belonging to the family Didolodontidae. Its fossilized remains have been found in South America.
Carolozittelia is an extinct genus of mammals, belonging to the order Pyrotheria. It contains the single species Carolozittelia tapiroides which lived during the Early Eocene. Its fossilized remains were found in South America.
Asmithwoodwardia is an extinct genus of mammals, from the order Litopterna. It lived during the Late Paleocene and the Early Eocene, and its fossilized remains were found in South America.
Protolipterna is an extinct genus of mammal, belonging to the order Litopterna. It lived during the Late Paleocene and the Early Eocene, in what is now South America.
Polymorphis is an extinct genus of litopterns belonging to the family Macraucheniidae. It lived during the Middle Eocene of Argentina.
Proadiantus is an extinct genus of herbivorous mammal, belonging to the order Litopterna. It lived during the Late Oligocene, in what is today South America.
Anisolambda is an extinct genus of litoptern ungulate, belonging to the family Proterotheriidae. It lived from the Late Paleocene to the Middle Eocene in what is now South America.
Proectocion is an extinct genus of herbivorous mammal, belonging to the order Litopterna. It lived during the Early Eocene, in what is now South America.
Xesmodon is an extinct genus of mammal. It lived from the Middle to the Late Eocene, in what is today South America.
Tetramerorhinus is an extinct genus of litoptern, belonging to the family Proterotheriidae. It lived during the Early Miocene in what is today 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.
Pseudhyrax is an extinct genus of Notoungulate, belonging to the suborder Typotheria. It lived from the Late Eocene to the Early Oligocene, and its remains were discovered in South America.
Eomorphippus is an extinct genus of notoungulate, belonging to the suborder Toxodonta. It lived from the Late Eocene to the Early Oligocene in what is today South America.
Ancylocoelus is an extinct genus of mammal, belonging to the order Notoungulata. It lived during the Late Oligocene, in what is today Argentina, in South America.
Cochilius is an extinct genus of notoungulate belonging to the suborder Typotheria. It lived between the Middle Eocene and the lower Miocene in what is now Argentina.
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.
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