Classification of Croft et al. 2004

Fm. †Toxodontidae Ameghino 1889
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Subfm. †Nesodontinae Murray 1866
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G. †Adinotherium Ameghino 1887
G. †Nesodon Owen 1846
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†Nesodon imbricatus Owen 1846
Fm. †Hegetotheriidae Ameghino 1894
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Subfm. †Hegetotheriinae Ameghino 1894
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G. †Hegetotherium Ameghino 1887
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†Hegetotherium mirabile Ameghino 1887
Fm. †Macraucheniidae Ameghino 1889
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Subfm. †Cramaucheniinae Ameghino 1902
Subfm. †Mesotheriinae Alston 1876
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G. †Altitypotherium Croft et al. 2004
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†Altitypotherium chucalensis Croft et al. 2004
†Altitypotherium paucidens Croft et al. 2004
G. †Eotypotherium Croft et al. 2004
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†Eotypotherium chico Croft et al. 2004
Subfm. †Cramaucheninae Ameghino 1902
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G. †Theosodon Ameghino 1887