Classification of Marshall et al. 1986

Fm. †Hegetotheriidae Ameghino 1894
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G. †Prohegetotherium Ameghino 1897
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†Prohegetotherium sculptum Ameghino 1897
G. †Oldfieldthomasia Ameghino 1901
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†Oldfieldthomasia debilitata Ameghino 1901