After Rasmussen & Simons, 1988, Prothero & Schoch, 1989 and McKenna & Bell, 1997

<==o †Pliohyracidae Osborn, 1899
   |-- †Pliohyracidae genera et species indet. [Undescribed taxon from Libya]
   |-- †Titanohyracinae
   |-- †Geniohyinae
   |-- †Saghatheriinae
   `-- †Pliohyracinae

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