After McKenna & Bell, 1997

<==o Suina [Suiformia] (pigs, peccarines and hippos; sikaeläimet)
   |?- †Aksyiria oligostus Gabunia, 1973
   |?- Hippopotamidae (virtahevot) [are selenodonts?? M. Fortelius, personal conversation]
   |?- †Raoellidae [treated as basal Ceteartiodactyls by Thewissen et al. (2007)]
   |-- Suoidea Gray, 1821 (siansukuiset sikaeläimet)
   `--+-- †Anthracotheroidea Leidy, 1869 sensu McKenna & Bell, 1997 (terrorpigs; anthrocotheroids; hirviösiat)
      `--+-- †Anoplotheroidea
         `--+-- †Oreodontoidea [Merycoidodontoidea; Oreodonta] (oreodontit)
            `-- †Entelodontoidea (entelodontoids; entelodontit)

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