Classification
Transpithecus obtentus was first described in 1901 by Florentino Ameghino, based on fossil remains found in Middle Eocene terrains from Argentina. Other fossils, initially described as different genera (Antepithecus, Acoelodus, Patriarchippus) were later attributed to the type species of Transpithecus.
Transpithecus is considered a member of Typotheria, a group of rodent-like notoungulate. Transpithecus was related to other basal typotheres, such as Notopithecus ; these two genera, historically considered basal members of the family Interatheriidae, have recently been placed within their own clade, Notopithecidae, outside of that family.
Trigonostylops is an extinct genus of South American meridiungulatan ungulate, from the Late Paleocene to Late Eocene of South America and Antarctica. It is the only member of the family Trigonostylopidae.
Astrapotheria is an extinct order of South American and Antarctic hoofed mammals that existed from the late Paleocene to the Middle Miocene, 59 to 11.8 million years ago. Astrapotheres were large and rhinoceros-like animals and have been called one of the most bizarre orders of mammals with an enigmatic evolutionary history.
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.
Prosotherium is an extinct genus of Typotheres, a lineage of mammal belonging to the order Notoungulata. It lived during the Late Oligocene, and its fossilized remains were found in South America.
Tremacyllus is an extinct genus of notoungulate mammals, belonging to the Typotheria suborder. It lived from the Late Miocene to the Late Pleistocene and its fossilized remains were discovered in South America.
Paginula is an extinct genus of mammal, belonging to the family Interatheriidae and to the order Notoungulata. It lived during the Eocene period in what is today Argentine Patagonia.
Henricosbornia is an extinct genus of Notoungulate. It lived from the Late Paleocene to the Middle Eocene, in what is today South America.
Eohyrax is an extinct genus of Notoungulate, belonging to the suborder Typotheria. It lived during the Middle Eocene, and its remains were discovered in 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.
Propachyrucos is an extinct genus of Notoungulate, belonging to the suborder Hegetotheria. It lived from the Late Oligocene to the Early Miocene, in what is today South America.
Antofagastia is an extinct genus of Notoungulate, belonging to the family Interatheriidae. It lived during the Late Eocene in what is today South America.
Pseudotypotherium is an extinct genus of Notoungulates, belonging to the suborder Typotheria. It lived from the Late Miocene to the Late Pliocene, and its fossilized remains were discovered in South America.
Isotemnus is an extinct genus of Notoungulate, belonging to the suborder Toxodonta. It lived from the Late Paleocene to the Middle Eocene, and its fossilized remains were found in South America.
Periphragnis is an extinct genus of Notoungulate, belonging to the suborder Toxodonta. It lived from the Middle Eocene to the Early Oligocene, and its fossilized remains were found in South America.
Pleurostylodon is an extinct genus of Notoungulate, from the suborder Toxodonta. It lived during the Middle Eocene, in what is today 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.
Eurygenium is an extinct genus of Notoungulate, belonging to the suborder Toxodonta. It lived during the Late Oligocene in what is today South America.
Morphippus is an extinct genus of Notoungulate, belonging to the suborder Toxodonta. It lived from the Middle to the Late 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.
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.
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