Classification of Reguero and Prevosti 2010

Or. †Notoungulata Roth 1903 [notoungulate]
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Subor. †Typotheria Zittel 1892
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Fm. †Interatheriidae Ameghino 1887
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Subfm. †Interatheriinae Simpson 1945
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G. †Eopachyrucos Ameghino 1901
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†Eopachyrucos pliciformis Simpson 1967
G. †Proargyrohyrax Hitz et al. 2000
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†Proargyrohyrax curanderensis Hitz et al. 2000
G. †Santiagorothia Hitz et al. 2000
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†Santiagorothia chiliensis Hitz et al. 2000
Subfm. †Notopithecinae Ameghino 1897
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G. †Antepithecus Ameghino 1901
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G. †Guilielmoscottia Ameghino 1901
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†Guilielmoscottia plicifera Ameghino 1901
G. †Notopithecus Ameghino 1897
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†Notopithecus adapinus Ameghino 1897
G. †Transpithecus Ameghino 1901
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†Transpithecus obtentus Ameghino 1901
Superfm. †Typotherioidea Reguero and Castro 2004
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Fm. †Archaeohyracidae Ameghino 1897
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G. †Archaeohyrax Ameghino 1897
G. †Archaeotypotherium Roth 1903
G. †Eohyrax Ameghino 1901
G. †Protarchaeohyrax Reguero et al. 2003
G. †Pseudhyrax Ameghino 1901
Fm. †Hegetotheriidae Ameghino 1894
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Subfm. †Hegetotheriinae Ameghino 1894
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G. †Prohegetotherium Ameghino 1897
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Invalid names: Ethegotherium Simpson et al. 1962 [synonym]
Fm. †Mesotheriidae Alston 1876
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Invalid names: Trachytheriinae Ameghino 1889 [empty]