After Laurin & Reisz, 1997

Alternative phylogeny after Paton, Smithson, & Clack, 1999

<==o Reptiliomorpha sensu Laurin & Reisz, 1997
   |-- †Tulerpeton curtum Lebedev, 1984
   |?- †Eldeceeon rolfei Smithson, 1994
   |?- †Caerorhachis bairdi Holmes & Carroll, 1977 [Caerorhachidae Holmes & Carroll, 1977]
   |?- †Tokosaurus perforatus Tverdochlebova & Ivachnenko, 1984 [Tokosauridae Tverdochlebova & Ivachnenko, 1984]
   |?-o †Chroniosuchia Kuhn, 1972 [ChroniosuchidaTatarinov, 1972]
   |  |?-o †Bystrowianidae Vjuschkov, 1957 [has been treated as Kotlassiid seymouriamorphs ()]
   |  |  |--o †Axitectum Shishkin & Novikov, 1992
   |  |  |  |-- †A. vjushkovi Shishkin & Novikov, 1992
   |  |  |  `-- †A. georgi Shishkin & Novikov, 1992
   |  |  |-- †Bystrowiana permira Vjuschkov, 1957
   |  |  |-- †Bystrowiella schumanni Witzmann, Schoch & Maisch, 2008
   |  |  |-- †Dromotectum spinosum Novikov & Shishkin, 1996
   |  |  `-- †Synesuchus muravjevi Novikov & Shishkin, 2000
   |  `--o †Chroniosuchidae Vjuschkov, 1957
   |     |--o †Chroniosuchus Vjuschkov, 1957 [incl. Buzulukia Vjuschkov, 1957?]
   |     |  |-- †C. paradoxus Vjuschkov, 1957
   |     |  `-- †C. licharevi (Ryabinin, 1962)
   |     |--o †Chroniosaurus Tverdokhlebova, 1972
   |     |  |-- †C. dongusensis (Tverdokhlebova, 1972)
   |     |  `-- †C. levis Golubev, 1998
   |     |-- †Jarilinus mirabilis (Vjuschkov, 1957)
   |     |-- †Uralerpeton tverdokhlebovae Golubev, 1998
   |     `-- †Suchonica vladimiri Golubev, 1998
   `--+-- †Emblomeri Cope, 1884 [Anthracosauroideae Watson, 1929]
      `--o Batrachomorpha sensu Laurin & Reisz, 1997 [Batrachosauria Gauthier et al., 1988]
         |--o †Gephyrostegida
         |  `--o †Gephyrostegidae Jaekel, 1909
         |     |-- †Gephyrostegus bohemicus Jaeckel, 1902 [Gephyrostega (lapsus calami)]
         |     |-- †Bruktererpeton fiebigi Boy & Bandel, 1973
         |     `-- †Eusauropleura digitata (Cope, 1868) [Sauropleura digitata Cope, 1868]
         `--+-- †Seymouriamorpha Watson, 1917
            `--+-- †Solenodonsaurus janenschi Broili, 1924 [Solenodonsauridae]
               `--o Tetrapoda Haworth, 1825 sensu stricto [the last common ancestor of modern amphibians and amniotes]
                  |-- Amphibia Gray, 1825 sensu Laurin, 1998a [Lepospondyli Zittel, 1888 sensu Laurin & Reisz, 1997]
                  `--+-- †Westlothiana lizziae Smithson & Rolfe, 1990
                     `--o Cotylosauria [Amniota sensu Lee & Spencer, 1997]
                        |-- †Diadectomorpha Watson, 1917 (Diadectes and relatives)
                        `-- Amniota Haeckel, 1866 (amniotes; vesikalvolliset selkärankaiset)

After Danto, Witzmann & Müller, 2012

<==o Reptiliomorpha
   |--o †Emblomeri
   |  |-- †Eoherpeton
   |  `--+-- †Proterogyrinus
   |     `--+-- †Pholiderpeton
   |        |-- †Archeria
   |        `--+-- †Eogyrinus
   |           `-- †Anthracosaurus
   `==o †Gephyrostegida
      |-- †Gephyrostegus
      `--+-- †Bruktererpeton
         `==o †Seymouriamorpha
            |-- †Discosauriscus
            `--+-- †Seymouria
               `--+-- †Kotlassia
                  `--+--+-- †Westlothiana
                     |  `--+-- †Solenodonsaurus
                     |     `-- †Lepospondyli
                     `--o Cotylosauria
                        |-- †Diadectomorpha
                        `-- Amniota


Reference(s):

  • Danto, M., Witzmann, F. & Müller, J., 2012: Redescription and phylogenetic relationships of Solenodonsaurus janenschi Broili, 1924, from the Late Carboniferous of Nırany, Czech Republic.
    –Fossil Record: Vol. 15, #2, pp. (45-59) [doi: 10.1002/mmng.201200003]

After Paton, Smithson, & Clack, 1999

<==o Reptiliomorpha
   |-- †Tulerpeton
   |?- †Eldeceeon
   |?- †Caerorhachis [Caerorhachidae]
   `--+-- †Anthracosauria
      `--+?- †Solenodonsaurus [Solenodonsauridae]
         |?- †Tokosaurus [Tokosauridae]
         |?-o †Chroniosuchidae
         |  |-- †Chroniosaurus
         |  `-- †Chroniosuchus
         |-- †Seymouriamorpha
         `--o Amniotamorpha
            |?- Microsauria
            |?- †Lysorophia
            `--o “Amniotaformes”
               |?- †Diadectomorpha
               `-- Amniota

Reference(s):

  • Paton, R. L., Smithson, T. R., & Clack, J. A., 1999: An amniote-like skeleton from the Early Carboniferous of Scotland.
    –Nature: Vol. 398, 8 April, pp. 508-513

Reference(s):