Parent taxon: Tetrapoda according to J. A. Clack and A. R. Milner 2015
See also Anderson 2001
Sister taxa: Acanthostegidae, Aistopoda, Amphibia, Antlerpeton, Austrobrachyops, Austrobrachyops jenseni, Aytonerpeton, Brittagnathus, Caerorhachidae, Casineria, Characichnos, Chroniosuchia, Collettosaurus, Colosteidae, Crassigyrinidae, Crucipes, Diploradus, Dipodiscus, Doragnathus, Eldeceeon, Embolomeri, Erpetopus, Gaiasia, Hemispondyla, Janusichnus, Janusichnus bifrons, Kirktonecta, Koilops, Laoporus, Limnosceloides, Limnosceloides brachycoles, Limnosceloides dunkardensis, Lunaepes, Merifontichnus, Mesanerpeton, Microsauropus, Miosauria, Namuncurania malarguense, Nasopus grimmi, Nothosaurops occiduus, Ossirarus, Paleosauropus, Parmastega, Perittodus, Plesiosaurus vaccinsulensis, Polyptychodon mackesoni, Reniformichnus, Reptiliomorpha, Romeriscus, Romeriscus periallus, Saurichnium parallelum, Sigournea, Silvanerpeton, Solenodonsaurus, Solidopus, Solidopus perissodactylus, Tambachichnium, Tantallognathus, Tetrapodium, Thecodontichnus, Theriodesmus, Typopus, Wangwusaurus, Wangwusaurus tayuensis, Westlothiana, Whatcheeriidae
Subtaxa: Baphetidae Eucritta Spathicephalidae
Ecology: planktonic suspension feeder
Distribution:
• Carboniferous of Canada (3: Nova Scotia collections), Czechia (1), the United Kingdom (21), United States (2: Ohio)
Total: 27 collections including 32 occurrences