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:
• Arenig of China (1 collection)
• Klabava of the Czech Republic (1)
• Ordovician of China (3), Sweden (4)
• Tremadoc of the Czech Republic (3), Iran (1), Norway (1), Poland (1)
• Solvan of Australia (1), Kazakhstan (2), Sweden (1)
• Amgan of the Czech Republic (1), Norway (1)
• Delamaran of Canada (4: British Columbia), Mexico (3), United States (5: Idaho, Montana, Nevada)
• Ordian of Australia (1)
• Caerfai of Canada (1: Nunavut), India (1), United States (1: Nevada)
• Cambrian of Antarctica (2), Australia (41), Canada (36: British Columbia, Labrador, Newfoundland, Newfoundland and Labrador), China (37), the Czech Republic (4), Denmark (3), France (1), Greenland (16), India (1), Kazakhstan (9), Kyrgyzstan (1), Mauritania (2), New Zealand (1), Norway (2), Pakistan (3), the Russian Federation (1), Spain (3), Sweden (3), United States (29: Alaska, Idaho, Montana, Nevada, New York, Pennsylvania, Texas, Utah)
Total: 232 collections including 263 occurrences