Rhynchonellata - Spiriferida - Spiriferidae
Parent taxon: Spiriferidae according to A. Williams et al. 2006
Sister taxa: Allanaria, Brachythyrinae, Delthyrinae, Gypospiriferinae, Prospirinae, Purdonellinae, Spiriferinae
Subtaxa: Afghanospirifer Anthracospirifer Brachiokasakhstania Cancellospirifer Eobrachythyris Eochoristitella Sergospirifer
Type: Sergospirifer
Ecology: stationary epifaunal suspension feeder
Distribution:
• Permian of Afghanistan (1 collection), Australia (6), Canada (5: British Columbia, Nunavut)
• Namurian of Afghanistan (1)
• Carboniferous of Brazil (2), Canada (8: Alberta, Northwest Territories, Nunavut), Egypt (1), India (1), Italy (1), Pakistan (1), United States (279: Alabama, Arizona, Arkansas, California, Colorado, Georgia, Idaho, Idaho-Utah, Illinois, Indiana, Iowa, Kansas, Kentucky, Missouri, Montana, Nebraska, Nevada, New Mexico, Oklahoma, Pennsylvania, Utah, Virginia, Wyoming)
• Devonian of Afghanistan (6), Germany (8), Iran (2), Poland (6)
Total: 328 collections including 366 occurrences