Classification of Marshall 1977
Fm. †Borhyaenidae Savage 1951
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Subfm. †Borhyaeninae Ameghino 1894
Subfm. †Hathliacyninae Ameghino 1894
Subfm. †Proborhyaeninae Ameghino 1897
Subfm. †Prothylacyninae Ameghino 1894