• Permian of Afghanistan (3 collections), Armenia (9), Australia (40), Austria (2), Azerbaijan (17), Bolivia (26), Canada (13: British Columbia, Nunavut, Yukon), China (267), Croatia (2), East Timor (1), Greece (1), India (1), Indonesia (3), Iran (70), Italy (8), Japan (16), Malaysia (10), Mongolia (3), Myanmar (4), Nepal (11), New Zealand (2), Oman (6), Pakistan (72), Peru (4), the Russian Federation (43), Slovenia (2), Svalbard and Jan Mayen (2), Tajikistan (2), Thailand (24), Tunisia (26), Turkey (17), Ukraine (6), United States (307: Alaska, Arizona, California, New Mexico, Oregon, Texas, Utah), Venezuela (3)

• Virgilian of United States (44: Illinois, New Mexico, Texas)

• Desmoinesian of United States (68: Kansas, Missouri, New Mexico, Oklahoma, Pennsylvania, Utah)

• Pennsylvanian of China (1), United States (3: Alaska, Utah)

• Namurian of Argentina (1), Australia (2)

• Chesterian of United States (17: Arkansas, California, Montana, Oklahoma, Wyoming)

• Osagean of Canada (2: Northwest Territories), Mexico (2), United States (10: Indiana, Montana, New Mexico, Utah, Virginia)

• Carboniferous of Australia (54), Bolivia (4), Brazil (1), Canada (23: Alberta, Northwest Territories, Nunavut, Yukon), China (8), Ireland (3), Libya (2), Malaysia (1), Peru (1), the Russian Federation (1), South Korea (1), Spain (1), the United Kingdom (22), United States (140: Alabama, Alaska, Arkansas, California, Idaho, Illinois, Indiana, Iowa, Iowa/Illinois, Kansas, Kentucky, Missouri, Montana, Nevada, New Mexico, New mexico, Oklahoma, Pennsylvania, Texas, Utah)

• Mississippian of Canada (1: Northwest Territories), United States (7: Alaska, California, Idaho, Washington, Oregon, Idaho, Montana, Nevada, Utah, California)

• Devonian of Afghanistan (1), Canada (9: Alberta, Northwest Territories, Ontario), China (3), Colombia (20), Germany (7), the Russian Federation (2), the United Kingdom (2), United States (170: Arizona, Indiana, Iowa, Maryland, Michigan, Missouri, Nevada, New Mexico, New York, Ohio, Pennsylvania, Wisconsin), Venezuela (2)

• Silurian to Devonian of Pakistan (1)

Total: 1660 collections including 1960 occurrences