Rhynchonellata - Spiriferida - Cyrtospiriferidae
Alternative spelling: Crytospiriferidae
Parent taxon: Cyrtospiriferoidea according to A. Williams et al. 2006
See also Balinski 1995, Savage and Baxter 1995 and Savage et al. 1978
Sister taxa: Conispiriferidae, Spinocyrtiidae
Subtaxa: Cyrtiopsinae Cyrtospiriferinae Pripyatispirifer Pyramidaspirifer Sphaenospira
Type: Cyrtospirifer
Ecology: stationary epifaunal suspension feeder
Distribution:
• Permian of the Russian Federation (1 collection)
• Carboniferous to Permian of China (1)
• Carboniferous of Argentina (1), Mexico (1), United States (3: California, Colorado, Indiana)
• Devonian to Carboniferous of the United Kingdom (2)
• Devonian of Afghanistan (33), Australia (7), Belgium (4), Canada (10: Alberta, British Columbia, Northwest Territories), China (23), France (29), Germany (13), Iran (30), Libya (8), Mauritania (1), Morocco (2), Poland (31), the Russian Federation (12), Spain (4), Tajikistan (5), the United Kingdom (6), United States (204: Alaska, Arizona, California, Colorado, Iowa, Maryland, West Virginia, Virginia, Montana, Nevada, New Mexico, New York, Ohio, Pennsylvania, Virginia, West Virginia), Venezuela (1), Vietnam (2)
Total: 434 collections including 633 occurrences