After Modesto, Rubidge & Welman, 2002, Kammerer & Angielczyk, 2009, and Botha-Brink & Angielczyk, 2010

<==o ††Endothiodontia Owen, 1876 sensu  Modesto, Rubidge & Welman, 2002, and  Kammerer & Angielczyk, 2009 [Endothiodontoidea Owen, 1876 (non Lydekker, 1890)]
   `--o †Endothiodontidae Owen, 1876 non Lydekker, 1890
      |-- †Lanthanostegus mohoii (Modesto, Rubidge & Welman, 2002) Modesto, Rubidge & Welman, 2003 [Lanthanocephalus mohoii Modesto, Rubidge & Welman, 2002 (non Lanthanocephalus Williams & Starmer, 2000 (Cnidaria: Anthozoa: Octocorallia: Alcyoniidae)]
      `--+-- †Chelyodontops altidentalis Cluver, 1975
         `--+-- †Pachytegos stockleyi Haughton, 1932
            `--o †Endothiodon [Esoterodon, Emydochampsa, Endogomphodon]
               |-- †E. platyceps Owen, 1876 [Emydochampsa]
               |-- †E. bathystoma Owen, 1876
               |-- †E. paucidens
               |-- †E. seeleyi
               |-- †E. sp.
               |-- †E. mahalanobisi Ray, 2000
               |-- †E. angusticeps [Esoterodon]
               |-- †E. uniseries Owen, 1879 [Esoterodon]
               `-- †E. whaitsi [Esoterodon]

Reference(s):