Synonym: Cyrtiacea Frederiks 1919 [replaced name]
Parent taxon: Spiriferidina according to A. Williams et al. 2006
See also Brunton and Champion 1974 and Jin and Chatterton 1997
Sister taxa: Adolfioidea, Ambocoelioidea, Brachythyridoidea, Cyrtospiriferoidea, Delthyridacea, Martinioidea, Paeckelmanelloidea, Spirifera paucicostata, Spirifera trapezoidalis, Spirifera vespertilio, Spiriferoidea, Theodossioidea
Subtaxa: Costispiriferidae Cyrtiidae Hedeinopsidae
Ecology: stationary epifaunal suspension feeder
Distribution:
• Triassic of United States (1: Alaska collection)
• Devonian of Afghanistan (1), Australia (14), Austria (3), Canada (1: Yukon Territory), China (12), Czechia (10), France (1), Germany (2), Kazakhstan (1), Mongolia (1), New Zealand (3), the Russian Federation (11), Spain (1), Tajikistan (4), Ukraine (1), United States (8: Alaska, New York, Tennessee), Uzbekistan (1), Vietnam (2)
• Whitwellian of Canada (3: Northwest Territories)
• Jaani of Estonia (9), Lithuania (4)
• Niagaran of Canada (3: Québec), United States (1: Indiana)
• Silurian to Devonian of Australia (1)
• Silurian of Afghanistan (1), Australia (17), Belarus (2), Canada (49: British Columbia, New Brunswick, Northwest Territories, Nunavut, Ontario, Québec), China (68), Czechia (28), Estonia (12), Greenland (1), Iran (6), Ireland (1), Kazakhstan (5), Latvia (1), Lithuania (29), Mexico (12), Mongolia (10), Morocco (1), Norway (3), the Russian Federation (13), Spain (2), Sweden (36), Tajikistan (1), Ukraine (8), the United Kingdom (36), United States (143: Alabama, Arkansas, California, Georgia, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Missouri, Nevada, New Hampshire, New York, Oklahoma, Tennessee, Utah, Wisconsin), Venezuela (3)
• Ordovician of Australia (2), China (22), Spain (1)
Total: 612 collections including 928 occurrences