• Permian of Afghanistan (1 collection), Australia (22), Azerbaijan (1), Bolivia (15), Cambodia (1), Canada (36: British Columbia, Northwest Territories, Nunavut, Yukon), China (69), East Timor (1), Germany (2), Greece (2), Greenland (29), Hungary (1), India (3), Indonesia (10), Iran (1), Italy (5), Japan (7), Laos (1), Lithuania (19), Madagascar (1), Malaysia (6), Mexico (4), Mongolia (6), Myanmar (8), Nepal (3), New Zealand (3), Oman (2), Pakistan (98), the Russian Federation (27), Slovenia (3), Svalbard and Jan Mayen (9), Tajikistan (3), Thailand (10), Tunisia (3), Turkey (1), Ukraine (5), the United Kingdom (26), United States (359: Alaska, California, New Mexico, Oregon, Texas)

• Namurian of Thailand (1)

• Carboniferous of Australia (12), Bolivia (1), Canada (6: Nunavut, Yukon), China (3), the Czech Republic (1), India (8), Italy (1), Libya (1), Nepal (1), Pakistan (1), the Russian Federation (5), South Korea (1), Spain (1), Svalbard and Jan Mayen (3), the United Kingdom (12), United States (73: Alaska, Arizona, Arkansas, California, Illinois, Indiana, Kentucky, Missouri, Montana, Nevada, New Mexico, Oklahoma, Texas)

• Givetian of United States (1: Missouri)

• Devonian of Canada (5: Alberta, Ontario), France (1), Italy (1), United States (40: Arizona, Indiana, Iowa, Michigan, Missouri, New York)

Total: 982 collections including 1295 occurrences