• Permian of Australia (32 collections), Azerbaijan (1), Cambodia (3), Canada (7: Nunavut), China (31), East Timor (1), Greece (1), Greenland (3), Hong Kong (1), India (1), Japan (1), Mongolia (2), New Zealand (3), the Russian Federation (2), Svalbard and Jan Mayen (2), Thailand (5), Tunisia (1), United States (10: Texas)

• Carboniferous of Algeria (4), Australia (2), Canada (11: Alberta, Northwest Territories, Yukon), China (14), Egypt (3), Germany (1), Ireland (8), Mexico (1), Morocco (5), Poland (1), the Russian Federation (5), Spain (1), Ukraine (2), the United Kingdom (28), United States (209: Arizona, Arkansas, California, Colorado, Idaho, Illinois, Indiana, Iowa, Kentucky, Montana, Nevada, New Mexico, Oklahoma, Tennessee, Texas, Utah, Virginia, Wyoming)

• Devonian of China (1), Germany (1), Spain (5), United States (8: Missouri, Montana, Montana, and Wyoming, New York)

• Niagaran of United States (1: Indiana)

• Silurian of Canada (23: Manitoba, Ontario), the Russian Federation (1), United States (6: Iowa, New York, Oklahoma, Wisconsin)

• Ordovician of Canada (3: Manitoba)

Total: 451 collections including 527 occurrences