After Ahlberg & Johanson, 1998, Johanson & Ahlberg, 1998, and Brazeau, 2005

<==o †Rhizodontida Andrews & Westoll, 1970
   |?- †Propycnotenion
   |?- †Pycnoctenion Vorobyeva, in Vorobeva & Obrucheva, in Menner (ed.), 1977
   |-- †Gooloogongia loomesi Johanson & Ahlberg, 1998
   `--+-- †Notorhizodon macelveyi Young, Long & Ritchie, 1992; L.Dev. Aust. [treated as tristichopterid by Clement (2002)]
      |?- †Spodichthys buetleri Jarvik, 1985; L.Dev. NENA. (Greenland) [treated as tristichopterid by Clement (2002)]
      |?-o †Sauripteridae Davis, Shubin & Daeschler, 2004
      |  |-- †Aztecia mahalae Johanson & Ahlberg, 2001; E.Carb. Ant.
      |  `--o †Sauripterus Hall, 1843 [Sauripteris] L.Dev. NA.
      |     |-- †S. taylori Hall, 1843
      |     `-- †S. halli
      `--o †“Rhizodontidae” sensu stricto?
         |?- †Archichthys portlocki (Portlock, 1843 ex Agassiz MS) Hancock & Athey, 1870 [taxonomic history] Carb. WEu.
         |?- †Letognathus hardingi (Dawson, 1868) Brazeau, 2005 [taxonomic history] E.Carb. NA.
         |-- †Barameda decipiens (Woodward, 1909) Long, 1989 [Strepsodus decipiens Woodward, 1909] L.Carb. Aust.
         `--+-- †Screbinodus ornatus Andrews, 1985
            `--+-- †Rhizodus hibberti Owen, 1840
               `-- †Strepsodus sauroides (Binney, 1841) Huxley, in Huxley & Etheridge, 1865 [taxonomic history] Carb. WEu. ENAm. Aust.

Reference(s):