• Permian of Australia (5 collections), Azerbaijan (1), China (6), East Timor (1), Indonesia (5), Italy (1), Myanmar (1), United States (4: Alaska, Texas), Vietnam (1)

• Carboniferous of Australia (2), Belgium (1), China (2), Ireland (7), Morocco (4), the Russian Federation (2), Turkey (1), Ukraine (2), the United Kingdom (21), United States (48: Alaska, Arkansas, California, Colorado, Georgia, Idaho, Indiana, Iowa, Kentucky, Montana, Tennessee, Utah, Wyoming)

• Givetian of Morocco (2)

• Devonian of Afghanistan (1), Belgium (1), Canada (5: Northwest Territories, Ontario), China (6), the Czech Republic (2), Kazakhstan (2), Mongolia (1), Morocco (2), Spain (1), United States (95: Alaska, Indiana, Kentucky, Michigan, Nevada, New York, Ohio)

• Silurian of Australia (6), Canada (21: Manitoba, New Brunswick, Northwest Territories, Ontario, Quebec), China (13), Japan (1), Mongolia (4), the Russian Federation (1), United States (6: Alaska, California, Indiana, Nevada, Wisconsin)

• Ordovician to Silurian of Canada (2: Northwest Territories)

• Ordovician of China (1)

Total: 288 collections including 329 occurrences