After Shoshoni & Tassy, (eds.), 1996

<==o †Gomphotheriidae Hay, 1922 sensu stricto [incl. Trilophodontidae]
   `--o †Gomphotherium Burmeister, 1837 [Serridentinus Osborn, 1923]
      |?- †G. intermedium
      |?- †G. ?inopiatum
      |?- †G. pygmaeus (Depéret, 1897)
      |-- †G. browni
      |-- †G. connexum
      |-- †G. productum
      |-- †G. republicum
      |-- †G. shensiense
      |-- †G. tongxinense
      |-- †G. wimani
      |--o †G. angustidens (Cuvier, 1806) [Trilophodon angustidens]
      |  |-- †G. a. libycum (Fourtau, 1918)
      |  |-- †G. a. steinheimense
      |  `-- †G. a. subtapiroideum
      `--o †G. annectes -group
         |-- †G. annectes
         |-- †G. cooperi [subspecies to G. annectes??]
         |-- †G. sylvanicum [subspecies to G. annectes??]
         `?- †G. sp. [subspecies to G. annectes??]

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