Full reference: C. W. Walcott. 1908. Cambrian Brachiopoda: descriptions of new genera and species. Smithsonian Miscellaneous Collections 53(3):53-137
Parent taxon: Lingulida according to C. B. Skovsted et al. 2017
See also Skovsted and Holmer 2005 and Williams et al. 2000
Sister taxa: Craniidina, Discinoidea, Linguloidea, Shouxianella, Trimerellacea
Subtaxa: Acrothelidae Botsfordiidae
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Klabava of the Czech Republic (1 collection)
• Arenig of China (1)
• Ordovician of China (3), the Czech Republic (3), Iran (1), Norway (1), Poland (1), Sweden (4)
• Cambrian of Antarctica (2), Australia (38), Canada (40: British Columbia, Labrador, Newfoundland, Newfoundland and Labrador), China (38), the Czech Republic (4), Denmark (3), France (1), Greenland (16), India (1), Kazakhstan (9), Kyrgyzstan (1), Mauritania (2), Mexico (7), New Zealand (1), Norway (2), Pakistan (3), the Russian Federation (1), Spain (3), Sweden (3), United States (34: Alaska, Idaho, Montana, Nevada, New York, Pennsylvania, Texas, Utah)
• Templetonian of Australia (4)
• Amgan of the Czech Republic (1), Norway (1)
• Solvan of Australia (1), Kazakhstan (2), Sweden (1)
• Caerfai of Canada (1: Nunavut), India (1), United States (1: Nevada)
Total: 237 collections including 270 occurrences