Hegetotherium

Hegetotherium is an extinct genus of mammals from the Middle Miocene (Santacrucian in the SALMA classification) of Argentina (Collón Curá, Sarmiento and Santa Cruz Formations) and Chile (Río Frías Formation), South America. 

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, but is now considered generically distinct from that genus. 

References 

Category:Notoungulates
Category:Miocene mammals of South America
Category:Santacrucian
Category:Neogene Argentina
Category:Fossils of Argentina
Category:Fossil taxa described in 1887
Category:Taxa named by Florentino Ameghino