After Yates, 1999, Yates & Warren, 2000, Warren & Marsicano, 2000, and Damiani, 2001

Four alternative phylogenies of stereospondyls.

<==o †Stereospondyli Zittel, 1887 (non? Fraas, 1889) sensu Yates & Warren, 2000
   |-- †Peltobatrachus pustulatus (Panchen, 1959) [Peltobatrachidae]
   `--+--o †Lapillopsidae
      |  |-- †Lapillopsis nana
      |  `-- †Rotaurisaurus contundo
      `--+--o †Rhinesuchidae Watson, 1919 sensu Romer, 1947 [incl. Uranocentrodontidae]
         |  |-- †“Lydekkerina” kitchingi Broom
         |  |-- †Laccosaurus watsoni Haughton [Laccocephalus??]
         |  |-- †Muchocephalus muchos Watson
         |  |-- †Rhineceps nyasaensis
         |  |-- †Rhinesuchoides
         |  |--o †Rhinesuchus
         |  |  |?- †Rhinesuchus indet. [Phrynosuchus whaitsi]
         |  |  `-- †R. rubidgei Broom, U. Perm. SA.
         |  |-- †Uranocentrodon U. Perm. SA.
         |  `-- †Broomistega putterilli (Broom, 1930) Shishkin & Rubidge, 2000 [“Lydekkerina” putterilli Broom, 1930] L. Trias. SA.
         `--+--o †Lydekkerinidae Broom, 1909 [Deltacephalidae Marya´nska & Shishkin, 1996]
            |  |?- †Broomulus
            |  |-- †Chomatobratrachus hali Cosgriff, 1974
            |  |-- †Cryobatrachus kitchingi
            |  |?- †Deltacephalus whitei Swinton, 1956
            |  |?- †Indobenthosuchus panchetensis (Tripathi, 1969) [also treated as a Indobrachyopid]
            |  |-- †Limnoiketes
            |  |-- †Lydekkerina huxleyi (Lydekker, 1889) Broom, 1909
            |  `?- †Putterillia
            `--+-- †Mastodonsauroidea Lydekker, 1885b sensu Damiani, 2001 [Capitosauria Yates & Warren, 2000] 
               `-- †Trematosauria Yates & Warren, 2000 [Trematosauroidea (Watson, 1919) sensu Damiani, 2001]

Stereospondyli incertae sedis sensu Damiani, 2001:

Benthosuchus madagascariensis (Lehman, 1961) [==> recently been treated as a species of Watsonisuchus]
    †Wetlungasaurus sp. (Lehman, 1961) or †Wetlungasaurus milloti [nomen nudum]


Stereospondyli indeterminate sensu Damiani, 2001:

Mastodonsaurus meyeri (Münster, 1834)
    †Odontosaurus voltzii (Meyer, 1835)
    †Labyrinthodon laniarius (Owen, 1942a)
    †Labyrinthodon ventricosus (Owen, 1942)
    †Labyrinthodon leptognathus (Owen, 1842a)
    †Xestorrhytias perrini (Meyer, 1855)
    †Pachygonia incurvata (Huxley, 1865)
    †Diadetognathus varvicensis (Miall, 1874)
    †Mastodonsaurus indicus (Lydekker, 1890)
    †Cyclotosaurus albertyni (Broom, 1904)
    †Ptychosphenodon browni (Seeley, 1907)
    †Syphonodon thecomastodon (Seeley, 1908)
    †Calamops paludosus Sinclair, 1917
    †Hemprichisaurus kauperinus (Kuhn, 1939) [Mastodonsaurus keuperinus?]
    †Parotosaurus turfanensis (Young, 1966)
    †Labyrinthodon panchetensis (Tripathi, 1969)
    †Ferganobatrachus riabinini Nesov, 1990

Alternative phylogenies of Stereospondyli:

After Milner 1994

<==o †Stereospondyli
   |--+-- †Chigutisauridae
   |  `--+-- †Lydekkerinidae
   |     `--o †“Rhytidosteoidea”
   |        |?- †Peltostega [Peltostegidae]
   |        |?- ?†Indobrachyopidae
   |        |?- †Laidleria [Laidleridae]
   |        `-- †Rhytidosteidae
   `--o †Capitosauroidea
      |-- †Capitosauridae
      `--o †“Benthosuchoidea”
         |==Benthosuchidae [paraphyletic]
         |--+-- †Benthosuchidae: Heylerosaurinae
         |  `-- †Mastodonsauridae
         `--+-- †Benthosuchidae: Thoosuchinae
            `--+-- †Trematosauridae
               `--o †Metoposauroidea
                  |-- †Latiscopidae [Almasauridae]
                  `-- †Metoposauridae

    

After Yates, 1999

<==o †Stereospondyli
   |--o †Archegosauroidea [Archegosauridae sensu Yates & Warren, 2000??]
   |  |-- †Actinodon [Actinodontidae]
   |  `--+-- †Intasuchus [Intasuchidae]
   |     `-- †Archegosauridae
   `--+-- †Rhinesuchidae
      `--+--o †Capitosauroidea?? [Mastodontosauridae sensu Yates & Warren, 2000??]
         |  |-- †Capitosauridae
         |  `--o †“Benthosuchoidea”
         |     |==Benthosuchidae [paraphyletic]
         |     |--+-- †Benthosuchidae: Heylerosaurinae
         |     |  `-- †Mastodonsauridae
         |     `--+-- †Benthosuchidae: Thoosuchinae
         |        `--+-- †Trematosauridae
         |           `--o †Metoposauroidea
         |              |-- †Latiscopidae [Almasauridae]
         |              `-- †Metoposauridae
         `--+--o †Brachyopomorpha Warren & Marsicano, 2000
            |  |-- †Bothriceps australis
            |  `--o †Brachyopoidea (Lydekker, 1885) sensu Broom, 1915
            |     |-- †Chigutisauridae Rusconi, 1949 [1951?]
            |     `-- †Brachyopidae (Lydekker, 1885) sensu Broom, 1915
            `--o †“Rhytidosteoidea” [Rhytidosteidae sensu Yates & Warren, 2000??]
               |?- †Peltostega [Peltostegidae]
               |?- ?†Indobrachyopidae
               |?- †Laidleria [Laidleridae]
               `-- †Rhytidosteidae

After Yates & Warren, 2000, and Warren & Marsicano, 2000

<==o †Stereospondyli
   |-- †Peltobatrachus [Peltobatrachidae]
   `--+-- †Lapillopsidae
      `--+-- †Rhinesuchidae [incl. Uranocentrodontidae]
         `--+--o †Trematosauria Yates & Warren, 2000
            |  |--+-- †Luzocephalus blomi Shishkin, 1980
            |  |  `-- †Trematosauroidea (Watson, 1919)
            |  `--+--o †Metoposauroidea (Watson, 1919)
            |     |  |-- †Latiscopidae [Almasauridae]
            |     |  `-- †Metoposauridae
            |     `--+--o †Plagiosauroidea (Abel, 1919)
            |        |  |-- †Laidleria [Laidleridae]
            |        |  `-- †Plagiosauridae Abel, 1919
            |        `--+--o †Brachyopomorpha Warren & Marsicano, 2000
            |           |  |-- †Bothriceps australis
            |           |  `--o †Brachyopoidea (Lydekker, 1885) sensu Broom, 1915
            |           |     |-- †Chigutisauridae Rusconi, 1949 [1951?]
            |           |     `-- †Brachyopidae (Lydekker, 1885) sensu Broom, 1915
            |           `--o †Rhytidosteoidea Huene, 1920 [Rhytidosteidae sensu Yates & Warren, 2000]
            |              |?- †Peltostega [Peltostegidae Säve-Söderbergh, 1935]
            |              |?- ?†Indobrachyopidae
            |              `-- †Rhytidosteidae Huene, 1920
            `--o †Capitosauria Yates & Warren, 2000
               |-- †Sclerothorax hypselonotus v. Huene, 1932 [Sclerothoracidae v. Huene, 1932]
               |-- †Lydekkerinidae [Deltacephalidae Marya´nska & Shishkin, 1996]
               `--o “Capitosauroidea” [Capitosauridae sensu lato]
                  |?- †Yarengia perplexa Shishkin, 1960 [Yarengiidae]
                  |==Benthosuchidae
                  |--+-- †Heylerosauridae Shishkin, 1980 [Eucyclotosauridae Morales & Kamphausen]
                  |  `-- †Mastodonsauridae Lydekker, 1885b
                  `--+-- †Benthosuchus Efremov, 1937 [paraphyletic Benthosuchidae]
                     `-- †Capitosauridae sensu stricto?
    

After Schoch, 2008

<==o †Stereospondyli
   |-- †Rhinesuchidae
   `--+-- †Lydekkerina
      `--+--o “BPR clade”
         |  |--o †Rhytidosteoidea Huene, 1920 [Rhytidosteidae sensu Yates & Warren, 2000]
         |  |  |?- †Peltostega [Peltostegidae Säve-Söderbergh, 1935]
         |  |  |?- ?†Indobrachyopidae
         |  |  `-- †Rhytidosteidae
         |  `--o †“Brachyopoidea plus”
         |     |--o †Brachyopomorpha Warren & Marsicano, 2000
         |     |  |?- †Bothriceps australis
         |     |  `--o †Brachyopoidea
         |     |     |-- †Chigutisauridae Rusconi, 1949 [1951?]
         |     |     `-- †Brachyopidae (Lydekker, 1885) sensu Broom, 1915
         |     `--o †Plagiosauroidea (Abel, 1919)
         |        |-- †Laidleria [Laidleridae]
         |        `-- †Plagiosauridae Abel, 1919
         `--+-- “Capitosauroidea” [Capitosauridae sensu lato]
            `--o †Trematosauria Yates & Warren, 2000
               |-- †Trematosauroidea (Watson, 1919)
               `--+-- †Luzocephaliscus [=? Luzocephalus blomi Shishkin, 1980]
                  |-- †Rileymillerus cosgroffi Bolt & Chatterjee, 2000
                  `--o †Metoposauroidea (Watson, 1919)
                     |-- †Latiscopidae [Almasauridae]
                     `--+-- †Callistomordax kugleri Schoch, 2008; M.Trias CEu.
                        `-- †Metoposauridae

    

 

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