After Yates, 1999

<==o †Stereospondyli
   |--o †Archegosauroidea [Archegosauridae sensu Yates & Warren, 2000 ??]
   |  |-- †Actinodon [Actinodontidae]
   |  `--+-- †Intasuchus [Intasuchidae]
   |     `--o †Archegosauridae
   |        |-- †Archegosaurus
   |        |-- †Bashkirosaurus
   |        |-- †Platyoposaurus
   |        `-- †Prionosuchus
   `--+--o †Rhinesuchidae
      |  |-- †Laccocephalus
      |  |-- †Muchocephalus
      |  |-- †Rhineceps
      |  |-- †Rhinesuchoides
      |  |-- †Rhinesuchus
      |  `-- †Uranocentrodon
      `--+-- †Capitosauroidea?? [Mastodontosauridae sensu Yates & Warren, 2000??]
         `--+-- †Brachyopomorpha Warren & Marsicano, 2000
            `--o †“Rhytidosteoidea” [Rhytidosteidae sensu Yates & Warren, 2000??]
               |?- †Peltostega [Peltostegidae]
               |?-o ?†Indobrachyopidae
               |  |-- †Indobrachyops
               |  |-- †Mahavisaurus
               |  `-- †Reuana
               |?- †Laidleria [Laidleridae]
               `--o †Rhytidosteidae
                  |-- †Arcadia
                  |-- †Boreopelta
                  |-- †Deltasaurus
                  |-- †Derwentia
                  |-- †Pneumatostega
                  `-- †Rhytidosteus

Reference(s):