• Carboniferous of Australia (2 collections)

• Devonian of Afghanistan (3), Algeria (1), Australia (12), Belgium (4), Canada (24: Alberta, Northwest Territories, Nunavut, Ontario), China (7), the Czech Republic (14), France (10), Libya (1), 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), the Czech Republic (8), the Russian Federation (1)

Total: 254 collections including 289 occurrences