Lingulata - Lingulida - Trematidae
Parent taxon: Discinoidea according to A. Williams et al. 2000
See also Holmer 1989, Popov 2000 and Wright 1963
Sister taxa: none
Subtaxa: Drabodiscina Schizobolus Schizocrania Trematis
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Carboniferous of United States (1: Indiana collection)
• Devonian of United States (5: New York)
• Silurian of Canada (3: Québec), the United Kingdom (5)
• Dobrotivian of Portugal (2), Spain (2)
• Uhaku of Sweden (1)
• Letna of the Czech Republic (1)
• Chazyan of United States (1: Alabama)
• Ordovician to Silurian of Canada (1: Québec), South Africa (1)
• Ordovician of Bolivia (1), Canada (7: Ontario), the Czech Republic (4), Ireland (1), Kazakhstan (5), Norway (2), South Africa (1), Spain (1), Sweden (2), the United Kingdom (56), United States (56: Illinois, Iowa, Indiana, Kentucky, Michigan, Minnesota, Missouri, New York, Ohio, Tennessee)
Total: 159 collections including 170 occurrences