After Yates & Warren, 2000

<==o †Dvinosauria Yates & Warren, 2000
   |--o †Trimerorhachidae Cope, 1882 [non? Cope, 1891]
   |  |?- †Doragnathus woodi Smithson, 1980
   |  |?- †Lafonius lehmani Berman, 1973(?)
   |  |?- †Nannospondylus stewarti Olson, 1965
   |  |-- †Neldasaurus wrightae Chase, 1965
   |  `--+-- †Procuhy nazariensis Cisneros, Marsicano, Angielczyk, Smith, Richter, Fröbisch, Kammerer & Sadleir, 2015
   |     `--o †Trimerorhachis Cope, 1878
   |        |-- †T. greggi Milner & Schoch, 2013
   |        |-- †T. insignis Cope, 1878
   |        |-- †T. mesops Cope, 1896
   |        |-- †T. rogersi Olson, 1955
   |        `-- †T. sandovalensis Berman & Reisz, 1980
   `--o †Dvinosauroidea Watson, 1919 sensu Säve-Söderbergh, 1935
      |-- †Timonya anneae Cisneros, Marsicano, Angielczyk, Smith, Richter, Fröbisch, Kammerer & Sadleir, 2015
      |--o †Eobrachyopidae Shishkin, 1964 [Saurerpetontidae Chase, 1965]
      |  |?- †Erpetosaurus radiatus (Cope, 1874a) Cope, 1874 [Tuditanus radiatus Cope, 1874; Diceratosaurus laevis Moodie, 1909; Diceratosaurus robustus Moodie, 1909]
      |  |-- †Isodectes obtusum (Cope, 1868) Cope, 1896 [Saurerpeton obtusum (Cope, 1868); Acheloma casei Broili, 1913; Colosteus foveatus Cope, 1869; Eobrachyops casei Broili, 1913; Eobrachyops townendae Watson, 1956; Isodectes megalops Cope, 1883; Pariotichus megalops Cope, 1883; Saurerpeton latithorax Cope, 1897; Sauropleura latithorax Cope, 1897; Trimerorhachis conangulus Cope, 1896; Tuditanus minimus Moodie, 1909; Tuditanus sculptilis Moodie, 1909; Tuditanus tabulatus Cope, 1877]
      |  `-- †Acroplous vorax Hotton, 1959
      `--+--o †Dvinosaurus Amalitskii, 1921 [Dvinosauridae Amalitskii, 1921; Dwinasauridae Watson, 1919]
         |  |-- †D. primus Amalitskii, 1921
         |  |-- †D. egregius Shishkin, 1968
         |  |-- †D. purlensis Shishkin, 1968
         |  `-- †D. campbelli Gubin, 2004
         `--o Tupilakosauridae Kuhn, 1960
            |-- †Dvinosauria genera et species indet.
            |-- †Kourerpeton bradyi Olson & Lammer, 1976 [Kourerpetontidae]
            `--+-- †Slaugenhopia texensis Olson, 1962 [Slaughenhopia Romer, 1966, lapsus calami]
               `--+-- †Thabanchuia oomie Warren, 1999
                  `--o †Tupilakosaurus Nielsen, 1954
                     |-- †T. heilmani Nielsen, 1954
                     `-- †T. wetlugensis Shishkin, 1961

After Cisneros, Marsicano, Angielczyk, Smith, Richter, Fröbisch, Kammerer & Sadleir, 2015

<==o †Dvinosauria
   |--o †Trimerorhachidae
   |  |-- †Neldasaurus wrightae
   |  `--+-- †Procuhy nazariensis
   |     `-- †Trimerorhachis ssp.
   `--o †Dvinosauroidea
      |-- †Timonya anneae
      `--+-- †Acroplous vorax
         `--+-- †Isodectes obtusum
            `--+-- †Dvinosaurus primus
               `--+-- †Slaugenhopia texensis
                  `--+-- †Thabanchuia oomie
                     `-- †Tupilakosaurus ssp.

Reference(s):

  • Cisneros, J. C., Marsicano, C., Angielczyk, K. D., Smith, R. M. H., Richter, M., Fröbisch, J., Kammerer, C. F. & Sadleir, R. W., 2015: New Permian fauna from tropical Gondwana.
    –Nature Communications: Vol. 6, Art.nr. pp. (8676) [doi: 10.1038/ncomms9676]

Reference(s):