After Carroll, 1988, Long 1990 and Williams, 1999-2000

<==o †Phoebodontidae Williams, in Zangerl, 1981
   |?-o †Acondylacanthus St. John & Worthen, 1875; Miss. NA.
   |  |-- †A. nuperus
   |  `-- †A. gracilis
   |?- †Anaclitacanthus semicostatus (St. John & Worthen, 1875a) Miss. NA. 
   |?- †Asteroptychius semiornatus (M'Coy, 1848a) Miss. Eu. 
   |?- †“Bathycheilodus” (St. John & Worthen, 1875)
   |?- †“Dittodus grabavi” Hossakof & Bryant, 1918
   |?- †“Pristodadodus springeri” (St. John & Worthen, 1875a) Miss. NA.
   |?-o †Thrinacodus St. John & Worthen, 1975 [non Thrinacodus Günther, 1879, invalid sr. synon. of Olallamys Emmons, 1988 (Mammalia: Eutheria: Rodentia: Hystricognathi: Echimyidae: Dactylomyinae)] [Harpagodens] [is a xenacanthid? (Carroll, 1988)]
   |  |-- †T. incurvus (Newberry & Worthen, 1866) [Diplodus incurvus Newberry & Worthen, 1866]
   |  |-- †T. ferox Turner, 1982
   |  `-- †T. nanus St. John & Worthen, 1875
   `--o †Phoebodus St. John & Worthen, 1875 M. Dev. Penn. NA. U. Dev. or L. Carb. EAs. 
      |-- †P. brodiei Woodward, 1893
      |-- †P. floweri Wells, 1944
      |-- †P. gothicus Ginter, 1990
      |-- †P. helsonum [=? P. hesleronum => Heslerodus divergens]
      |-- †P. keuperensis Seilacher, 1948
      |-- †P. limpidus Ginter, 1990
      |-- †P. sophiae St. John & Worthen, 1875 [type]
      |-- †P. polidus Wang & Turner, 1985
      `-- †P. australiensis Long, 1990

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