Parent taxon: Dipnoi according to J. S. Nelson et al. 2016
See also Sepkoski 2002
Sister taxa: Adelargo, Amadeodipterus, Apatorhynchus, Ballagadus, Cathlorhynchus, Celsiodon, Ceratodonti, Ceratodontidae, Ceratodontoidei, Chirodipteroidea, Coccovedus, Ctenodontiformes, Ctenodontoidei, Ctenodus, Devonesteus, Devonosteus, Diabolepidiformes, Dianodipterus, Dipnoiformes, Dipnorhynchiformes, Dipnorhynchina, Dipnorhynchoidei, Dipteri, Dipterida, Dipteroidei, Dongshanodus, Ferganoceratodus, Gnathorhizidae, Gosfordia, Harajicadipterus, Holodipterida, Jessenia, Limanichthys, Megapleuron, Melanognathus, Neoceratodontidae, Nielsenia, Occludus, Oervigia, Persephonichthys, Pinnalongus, Proceratodus, Protoceratodontidae, Protopteri, Ptychoceratodontidae, Rhinodipteridae, Sagenodontidae, Sinodipterus, Sirenoidei, Speonesydrionidae, Speonesydrionina, Speonysedrion, Synthetodus, Tarachomylax, Uranolophina, Uronemoidei, Westollrhynchus, Xylognathus
Subtaxa: Dipteridae Fleurantiidae Iranorhynchus Phaneropleuridae Rhynchodipteridae Sponysedrion Stomiahykidae
Ecology:
Distribution:
• Carboniferous of the United Kingdom (1 collection)
• Givetian of the United Kingdom (1)
• Devonian of Australia (3), Belarus (2), Belgium (1), Canada (2: Quebec, Yukon), Estonia (3), Germany (4), Greenland (2), Iran (2), Latvia (4), Poland (2), the Russian Federation (3), the United Kingdom (20), United States (3: Colorado, Pennsylvania)
• Silurian of Norway (1), United States (2: Wisconsin)
Total: 56 collections including 70 occurrences