After Lee, 1993, 1996, and 1997 (fig. 21), and Tsuji & Müller, 2009

<==o Pareiasauroidea Nopcsa, 1928
   |?-o †Sclerosauridae [maybe aberrant procolophonids (Sues & Baird, 1998, deBraga, 2003)]
   |  |?- †Basileosaurus freyi Wiedersheim, 1879
   |  `-- †Sclerosaurus armatus v. Meyer, 1859 [Aristodesmus]
   `--o Pareiasauria Seeley, 1888 [Pareiasauridae Cope, 1896 sensu lato]
      |--o †Bradysaurus Watson, 1914b [Brachypareia; Bradysuchus; Koalemasaurus; Platyoropha]; U.Perm.
      |  |?- †B. rogersi [Brachypareia]
      |  |?- †B. acutirostris [Koalemasaurus]
      |  `?- †B. whaitsi
      |-- †Bradysaurus baini (Seeley, 1892)  Watson, 1914b; U.Perm.
      `--+-- †“Bradysaurusseeleyi Haughton & Boonstra, 1929
         `--o Velosauria Lee, 1994 sensu Lee, 1997
            |-- †Nochelosaurus alexandri Haughton & Boonstra, 1929 [Nochelesaurus (lapsus calami)] U.Perm.
            `--+-- †Embrithosaurus schwarzi Watson, 1914 [Dolichopareia, Nochelesaurus]
               `--+-- †Bunostegos akokanensis Sidor, Blackburn & Gado, 2003; U.Perm. WCAf.
                  `--+-- †Deltavjatia vjatkensis (Hartmann-Weinberg, 1937) Lebedev in Ivakhnenko, 1987 [taxonomic history] U.Perm. EEu.
                     `--o Velosauria Lee, 1994 sensu Jalil & Janvier, 2005
                        `--o †Pareiasauridae Cope, 1896 sensu stricto?
                           |?- †Pareiasauria gen. et sp. indet. 1 [Argana Basin, Marocco] [Jalil & Janvier, 2005]
                           |?- †Pareiasauria gen. et sp. indet. 2 [Argana Basin, Marocco] [Jalil & Janvier, 2005]
                           |-- “Welgevonden pareiasaur”
                           `--+--+-- †Shansisaurus xuecunensis; U.Perm. EAs.
                              |  `--+-- †Shihtienfenia permica; U.Perm.
                              |     `--o †Pareiasuchus
                              |        |-- †P. peringueyi
                              |        `-- †P. nasicornis
                              `--+-- †Sanchuansaurus pygmaeus (sedis mutabilis); U.Perm. CAs.
                                 |--o †Pareiasaurus Owen, 1876; U.Perm. [Pareiasuchus Lydekker, 1890; Propappus Seeley, 1888; ?Pareiasuchus Broom & Haughton, 1913]
                                 |  |?- †P. strubeni
                                 |  `-- †P. serridens Owen, 1876 [Propappus serridens (Owen, 1876); Propappus omocratus Seeley, 1888; Pareiasaurus omocratus (Seeley, 1888); Pareiasaurus minor Seeley, 1892; Anthodon gregoryi Broom, 1930; Propappus rogersi Broom, 1912; Brachypareia rogersi (Broom, 1912); Bradysaurus rogersi (Broom, 1912); Pareiasaurus pinnatus Olson & Broom, 1937; Pareiasaurus rubidgei Broom, 1940; Anthodon nesemanni Broom, 1940]
                                 `--+-- †Scutosaurus karpinskii (Amalitskii, 1922) Hartmann-Weinberg, 1930 [Amalitzkia, Proelginia permiana]; U.Perm. EEu.
                                    `--+-- †Arganaceras vacanti Jalil & Janvier, 2005; U.Perm. NWAf.
                                       |-- †Parasaurus geinitzi von Meyer, 1857 (non Marsh, 1885) U.Perm.
                                       |-- “Kupferschiefer pareiasaur”; U.Perm.
                                       |--o †Elginia U.Perm. WEu.
                                       |   |?- †E. gordoni
                                       |   `-- †E. mirabilis Newton, 1893
                                       `--o Pumiliopareiasauria Lee
                                          |-- †Nanopareia luckhoffi; U.Perm.
                                          |-- †Provelosaurus americanus (Araújo, 1985) [Pareiasaurus americanus Araújo, 1985] U.Perm. SA.
                                          `--+--o †Anthodon Owen, 1876; U.Perm.
                                             |  |?- †A. gregoryi Broom, 1930 [=? Pareiasaurus serridens Owen, 1876]
                                             |  `-- †A. serrarius Owen, 1876
                                             `-- †Pumilopareia pricei Broom & Robinson, 1948 [“Nanoparia” pricei]; U.Perm.

After Lee, 1993, 1996, and 1997 (fig. 21), and Jalil & Janvier, 2005

<==o Hallucicrania
   |?-o †Lathanosuchoidea
   |  |--o †Acleistorhinidae
   |  |  |-- †Colobomycter
   |  |  `-- †Acleistorhinus
   |  `--o †Lanthanosuchidae
   |     |-- †Chalcosaurus
   |     |-- †Lanthaniscus
   |     `-- †Lanthanosuchus
   `--o Pareiasauroidea
      |?-o †Sclerosauridae
      |  |?- †Basileosaurus
      |  `-- †Sclerosaurus
      `--o Pareiasauria
         |-- †“Bradysaurusseeleyi
         `--+-- †Bradysaurus baini
            `--o Velosauria
               |-- †Nochelesaurus
               `--+-- †Embrithosaurus
                  `--+-- †Bunostegos
                     `--+-- †Deltavjatia
                        `--o Velosauria
                           |--o †Pareiasauridae
                           |  |--+-- †Shansisaurus
                           |  |  `--+-- †Shihtienfenia
                           |  |     `-- †Pareiasuchus
                           |  `--+?- †Sanchuansaurus (sedis mutabilis)
                           |     |-- †Pareiasaurus
                           |     `--+-- †Scutosaurus
                           |        `--+-- †Arganaceras
                           |           |-- †Parasaurus
                           |           |-- “Kupferschiefer pareiasaur”
                           |           `-- †Elginia
                           `--+-- †Pareiasauria gen. et sp. indet. 1 [Argana Basin, Marocco] [Jalil & Janvier, 2005]
                              `--o Pumiliopareiasauria
                                 |?- †Nanopareia
                                 |-- †Provelosaurus
                                 `--+-- †Anthodon
                                    `--+-- †Pumilopareia
                                       `-- Chelonia

Reference(s):