Parent taxon: Sarcopterygii according to J. S. Nelson et al. 2016
See also Brazeau 2005, Davis et al. 2004, Holland et al. 2007, Jeffery 2006, Johanson and Ahlberg 1998 and Johanson and Ahlberg 2001
Sister taxa: Achoania, Actinistia, Akinetia, Coelacanthimorpha, Dipnoi, Dipnomorpha, Dipnotetrapodomorpha, Guiyu, Lepidosireniformes, Ligulalepis, Onychodontia, Onychodontida, Onychodontiformes, Osteolepidida, Osteolepiformes, Psarolepis, Rhipidistia, Tetrapoda, Youngolepis
Subtaxa: Archichthys Barameda Gooloogongia Letognathus Rhizodontiformes Sauripteridae Strepsodus
Distribution:
• Carboniferous of Australia (1 collection), Belarus (3), Ireland (1), the United Kingdom (16), United States (4: Iowa, Montana, West Virginia)
• Devonian of Antarctica (3), Australia (1), Belarus (1), Colombia (1), United States (1: Pennsylvania)
Total: 32 collections including 35 occurrences