Anthozoa - Stauriida - Cyathaxoniidae
Parent taxon: Metriophyllina according to D. Hill 1981
See also Hill 1956
Sister taxa: Combophyllidae, Famaxonia, Gymnophyllum, Hadrophyllidae, Kielcephyllidae, Laccophyllidae, Lindstroemiidae, Lyliophyllum, Metriophyllidae, Petraiidae, Rhipidophyllum, Ridderia
Subtaxa: Cyathaxonella Cyathaxonia Cyathocarinia Hamaraxonia
Type: Cyathaxonia
Ecology: stationary epifaunal suspension feeder
Distribution:
• Permian of Cambodia (2 collections), China (10), the Russian Federation (2)
• Carboniferous of Australia (2), China (3), France (1), Germany (3), Ireland (4), Japan (5), Mexico (1), Morocco (2), the Russian Federation (2), Spain (1), Svalbard and Jan Mayen (1), Turkey (1), the United Kingdom (14), United States (40: Alaska, California, Idaho, Indiana, Iowa, Kentucky, Montana, Nevada, Tennessee, Utah)
• Devonian of Morocco (1), Poland (1)
• Silurian of United States (4: Wisconsin)
Total: 100 collections including 107 occurrences