Parent taxon: Lingulata according to L. E. Holmer 1989
Sister taxa: Acrotretida, Lingulida, Siphonotretida
Subtaxa: Discinacea
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Quaternary of Japan (1 collection), United States (1: California)
• Pliocene of Italy (2), Peru (3), United States (7: Florida, Oregon, South Carolina, Virginia)
• Miocene of Argentina (5), Austria (1), Belgium (2), Chile (1), Poland (4), South Africa (1), United States (23: California, Florida, Maryland, New Jersey)
• Oligocene of Austria (1), Germany (11), United States (1: California)
• Eocene of New Zealand (1), the United Kingdom (4), United States (3: California, Washington)
• Cretaceous of Cameroon (1), Chile (3), Germany (1), United States (18: Arizona, Colorado, Mississippi)
• Jurassic of Chile (1), France (1), Greenland (4), New Zealand (2), Norway (1), Portugal (1), the Russian Federation (2), the United Kingdom (18)
• Triassic of Austria (1), Bosnia and Herzegovina (1), China (1), Germany (2), Hungary (2), Italy (1), Jordan (1), the Russian Federation (1), Svalbard and Jan Mayen (2), Türkiye (1), the United Kingdom (1), United States (1: Utah)
• Permian of China (1), the Russian Federation (3), Ukraine (1)
• Carboniferous of Ireland (1), Libya (2), Peru (3), United States (6: California, Kansas, Kentucky, Ohio, Oklahoma)
• Devonian to Carboniferous of Libya (1)
• Devonian of Czechia (4), Germany (1), Ghana (1), Libya (1), Morocco (1), Poland (1), United States (8: Iowa, New York, Wisconsin)
• Silurian of Czechia (1), Sweden (1)
• Ordovician of Australia (1), Czechia (1), United States (1: Ohio)
• Cambrian of Pakistan (2)
Total: 182 collections including 183 occurrences