Parent taxon: Temnospondyli according to R. R. Schoch and A. R. Milner 2014
Sister taxa: Almasauroidea, Anthichnium, Archegosauriformes, Archegosauroidea, Arkanserpeton, Arkanserpeton arcuatum, Baropezia, Capetus, Colosteoidea, Edopsoidea, Episcopopus, Eurycervix, Euskelia, Eutemnospondyli, Hemiprichisaurus, Hesperoherpeton, Hylopus, Ichthyostegalia, Labyrinthodon laniarius, Labyrinthodon pachygnathus, Labyrinthodon ventricosus, Limnarchia, Lissamphibia, Lysipterygiidae, Megapezia, Miobatrachus, Nanopus, Orthosauriscus, Otuminisaurus, Otuminisaurus limensis, Palaeosauropus, Palatinerpeton, Petrophryne major, Phrynosuchus, Phrynosuchus whaitsi, Pleuronoura, Porierpeton, Ptychosphenodon, Ptychosphenodon browni, Rhinesuchoidea, Rileymillerus, Saharastega, Saurischiocomes, Saurischiocomes keuperinus, Syphonodon, Syphonodon thecomastodon, Temnocorpichnus, Zatrachys conchigerus
Subtaxa: none
Ecology: amphibious carnivore
Distribution:
• Permian of Niger (2 collections), United States (12: New Mexico, Ohio, Texas)
• Carboniferous to Permian of United States (2: Texas)
• Carboniferous of Canada (1: Nova Scotia), Czechia (2), Ireland (1), United States (3: New Mexico, Ohio, West Virginia)
Total: 23 collections including 26 occurrences