Rhynchonellata - Spiriferida - Spiriferidae
Parent taxon: Spiriferidae according to A. Williams et al. 2006
See also Waterhouse 2004
Sister taxa: Allanaria, Brachythyrinae, Delthyrinae, Gypospiriferinae, Intermedites, Purdonellinae, Sergospiriferinae, Spiriferinae
Subtaxa: Andreaspira Atylephorus Austrochoristites Finospirifer Kinghiria Parallelora Prospira Subspirifer Unispirifer
Ecology: stationary epifaunal suspension feeder
Distribution:
• Carboniferous of Afghanistan (2 collections), Australia (54), Belgium (1), Canada (59: Alberta), China (6), France (1), Iran (2), Ireland (2), Libya (5), the United Kingdom (15), United States (35: Arkansas, California, Idaho, Illinois, Indiana, Iowa)
• Devonian of Afghanistan (1), Belgium (1), Canada (1: Alberta), China (3), France (4), Iran (1), the Russian Federation (1), United States (1: Montana, and Wyoming)
Total: 195 collections including 220 occurrences