mainly after McKenna & Bell, 1997

<==o †Procreodi [Arctocyonia Van Valen, 1969]
   |?-o †Quettacyonidae Gingerich, Abbas & Arif, 1997 [Arctocyonidae: Quettacyoninae Gingerich, Abbas & Arif, 1997]
   |  |-- †Machocyon abbasi Gingerich, Arif, Khan, Clyde & Bloch, 1999
   |  |-- †Obashtakaia aeruginis Gingerich et al., 1998
   |  |-- †Quettacyon parachai Gingerich, Abbas & Arif, 1997
   |  `-- †Sororocyon usmalii Gingerich et al., 1998
   |-- †Oxyclaenidae
   `--+?-o †“Protungulatidae”
      |  |-- †Tiznatzinia vanderhoofi
      |  `--o †Protungulatum Sloan & Van Valen, 1965 [Proungulatum lapsus calami]
      |     |-- †P. gorgun Van Valen, 1978
      |     |-- †P. sloani Van Valen, 1978
      |     |-- †P. donnae Sloan & Van Valen, 1965
      |     `-- †P. mckeeveri Archibald, 1982
      `--+-- †Arctocyonidae Giebel, 1855
         `-- Other Eparctocyonan ungulates

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