Anthozoa - Stauriida - Hapsiphyllidae
Parent taxon: Hapsiphyllidae according to D. Hill 1981
Sister taxa: Adradosiinae, Allotropiochisma, Allotropiophyllum, Euryphyllum, Innixiphyllum, Monophyllum
Subtaxa: Allophyllum Amplexizaphrentis Barytichisma Canadiphyllum Clinophyllum Duplophyllum Famennelasma Hapsiphyllum Longiclava Meniscophyllum Neozaphrentis Zaphrentites Zaphrentula
Ecology: stationary epifaunal suspension feeder
Distribution:
• Permian of Azerbaijan (1 collection), China (8), East Timor (1), Greece (1), Greenland (3), Hong Kong (1), Tunisia (1)
• Carboniferous of Algeria (4), Australia (1), Canada (10: Alberta, Northwest Territories, Yukon), China (14), Egypt (3), Germany (1), Ireland (8), Mexico (1), Morocco (4), Poland (1), the Russian Federation (5), Spain (1), Ukraine (1), the United Kingdom (19), United States (209: Arizona, Arkansas, California, Colorado, Idaho, Illinois, Indiana, Iowa, Kentucky, Montana, Nevada, New Mexico, Oklahoma, Tennessee, Texas, Utah, Virginia, Wyoming)
• Devonian of China (1), Germany (1), Spain (4), United States (8: Missouri, Montana, Montana, and Wyoming, New York)
• Niagaran of United States (1: Indiana)
• Silurian of Canada (23: Manitoba, Ontario), the Russian Federation (1), United States (5: Iowa, New York, Wisconsin)
• Ordovician of Canada (3: Manitoba)
Total: 345 collections including 391 occurrences