Mammalia - Notoungulata - Isotemnidae

Synonyms: Amphitemnus nucleatus Ameghino 1904, Amphitemnus transitorius Ameghino 1904, Dimerostephanos angustus Ameghino 1897, Eochalicotherium cretaceum Ameghino 1901, Isotemnus conspiquus Ameghino 1897, Trimerostephanos angustus Ameghino 1897

Full reference: F. Ameghino. 1897. Mammiféres crétacés de l’Argentine (Deuxième contribution à la connaissance de la fauna mammalogique de couches à Pyrotherium) [Cretaceous mammals of Argentina (second contribution to the knowledge of the mammalian fauna of the Pyrotherium Beds)]. Boletin Instituto Geografico Argentino 18(4–9):406-521

Belongs to Isotemnus according to G. G. Simpson 1967

See also Ameghino 1897, Ameghino 1901, Ameghino 1902 and Ameghino 1904

Sister taxa: Isotemnus colhuehuapiensis, Isotemnus ctalego, Isotemnus haugi, Isotemnus latidens, Prostylops typus

Type specimens:

• Isotemnus primitivus: Its type locality is Casamayoran of Patagonia, which is in a Casamayoran terrestrial horizon in Argentina
• Amphitemnus nucleatus: Its type locality is Barranca south of Lago Colhue-Huapi, Gran Barranca, which is in a Bartonian terrestrial claystone in the Sarmiento Formation of Argentina.
• Amphitemnus transitorius: Its type locality is Barranca south of Lago Colhue-Huapi, Gran Barranca, which is in a Bartonian terrestrial claystone in the Sarmiento Formation of Argentina.
• Eochalicotherium cretaceum: Its type locality is Casamayoran of Patagonia, which is in a Casamayoran terrestrial horizon in Argentina.
• Isotemnus conspiquus: Its type locality is Barranca south of Lago Colhue-Huapi, Gran Barranca, which is in a Bartonian terrestrial claystone in the Sarmiento Formation of Argentina.
• Trimerostephanos angustus: Its type locality is Barranca south of Lago Colhue-Huapi, Gran Barranca, which is in a Bartonian terrestrial claystone in the Sarmiento Formation of Argentina.

Ecology: scansorial herbivore

Distribution:

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Specimen images are retrieved through the ePANDDA API.