''Hegetotherium'' is an extinct genus of mammals from the Early to Middle Miocene (

Colhuehuapian The Colhuehuapian age is a period of geologic time (21.0–17.5 Ma) within the Early Miocene epoch of the Neogene, used more specifically within the SALMA classification in South America. It follows the Deseadan and precedes the Santacrucian ag ...

Colloncuran The Colloncuran ( es, Colloncurense) age is a period of geologic time (15.5–13.8 Ma) within the Middle Miocene epoch of the Neogene, used more specifically within the SALMA classification in South America. It follows the Friasian and precedes ...

in the SALMA classification) of

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southe ...

. Fossils of this genus have been found in the Cerro Bandera, Cerro Boleadoras,

Chichinales Chichinales is a village and municipality in Río Negro Province in Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an a ...

, Collón Curá, Santa Cruz and

Sarmiento Formation The Sarmiento Formation (Spanish: ''Formación Sarmiento''), in older literature described as the Casamayor Formation, is a geological formation in Chubut Province, Argentina, in central Patagonia, which spans around 30 million years from the mid- ...

s of

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...

, the

Nazareno Formation Nazareno is a Brazilian municipality located in the state of Minas Gerais. The city belongs to the mesoregion of Campo das Vertentes and to the microregion of Sao Joao del Rei. In 2020, the estimated population was 8,660. See also * List of mun ...

Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...

, and the Galera and

Río Frías Formation Río Frías Formation ( es, Formación Río Frías) is a Miocene, Middle Miocene geologic formation made up sedimentary rock located in Aysén Region, western Patagonia. The formation crops out along the upper couse of Cisnes River ( es, Río Cisn ...

s of Chile.

Taxonomy

''Hegetotherium'' is currently restricted to the type species, ''H. mirable'', of which ''H. convexum'', ''H. anceps'', ''H. minum'' and ''H. andinum'' are synonyms, but also ''H. cerdasensis''. ''"Hegetotherium" arctum'' was formerly assigned to this genus, but is clearly not a member of Hegetotheriidae. ''"Hegetotherium" novum'' was formerly referred to the closely related genus ''

Prohegetotherium ''Prohegetotherium'' is an extinct genus of Hegetotheriidae, hegetotheriid Notoungulata, notoungulates from the Oligocene, Late Oligocene to Miocene, Early Miocene (Deseadan-Santacrucian in the South American land mammal age, SALMA classificatio ...

'', but is now considered generically distinct from that genus.F. D. Seoane, S. R. Juñent, and E. Cerdeño. 2017. Phylogeny and paleobiogeography of Hegetotheriidae (Mammalia, Notoungulata). Journal of Vertebrate Paleontology 37(1):e1278547:1-13.

References

Typotheres Miocene mammals of South America Colloncuran Friasian Santacrucian Colhuehuapian Neogene Argentina Fossils of Argentina Fossil taxa described in 1887 Taxa named by Florentino Ameghino Prehistoric placental genera Austral or Magallanes Basin Golfo San Jorge Basin Neuquén Basin Santa Cruz Formation Sarmiento Formation Chichinales Formation Cerro Bandera Formation {{paleo-mammal-stub