• Carboniferous of Australia (2 collections)

• Couvinien of Australia (1)

• Devonian of Afghanistan (3), Algeria (1), Australia (15), Belgium (4), Canada (24: Alberta, Northwest Territories, Nunavut, Ontario), China (8), Czechia (14), France (10), Libya (2), Morocco (2), Poland (1), the Russian Federation (7), Spain (1), United States (147: Alaska, Iowa, Missouri, Nevada, New Mexico, New York, Pennsylvania)

• Silurian of Canada (5: Northwest Territories, Nunavut), China (4), Czechia (8), the Russian Federation (1), the United Kingdom (1)

Total: 261 collections including 297 occurrences