Parent taxon: Sarcopterygii according to R. van der Laan 2019
See also Brazeau 2005, Davis et al. 2004, Holland et al. 2007, Jeffery 2006, Jeffery 2012, Johanson and Ahlberg 1998, Johanson and Ahlberg 2001 and Nelson et al. 2016
Sister taxa: Achoania, Actinistia, Actinistia, Akinetia, Dipnomorpha, Dipnotetrapodomorpha, Guiyu, Lepidosireniformes, Ligulalepis, Onychodontia, Onychodontida, Osteolepidida, Psarolepis, Ptyctolepis, Rhipidistia, Tetrapoda, Amii, Osteolepidae, Saurodipterini, Taxistia, Belonostomi, Platysomi, Haplistia, Belonorhynchi, Cyclolepidi, Lepidostei, Heterocerci, Polypterini, Eugnathi
Subtaxa: Archichthys Barameda Floydus Letognathus Pycnoctenion Rhizodontidae Rhizodontiformes Sauripteridae
Distribution:
• Carboniferous of Australia (2 collections), Belarus (3), Canada (1: Nova Scotia), Ireland (1), the Russian Federation (2), the United Kingdom (24), United States (4: Iowa, Montana, West Virginia)
• Devonian of Antarctica (3), Australia (1), Belarus (1), China (1), Colombia (1), the United Kingdom (2), United States (1: Pennsylvania)
Total: 47 collections including 52 occurrences