• Permian of Afghanistan (3 collections), Australia (2), Bolivia (5), Canada (18: Alberta, British Columbia, Nunavut, Yukon), China (7), Greenland (18), Japan (4), Laos (1), Malaysia (7), Mexico (18), Mongolia (1), Nepal (1), Pakistan (32), Peru (2), Poland (2), the Russian Federation (62), Slovenia (1), Svalbard and Jan Mayen (3), Thailand (8), United States (174: Alaska, California, Idaho, Montana, Nevada, New Mexico, Oregon, Texas, Utah, Wyoming)

• Namurian of Australia (1)

• Carboniferous to Permian of Svalbard and Jan Mayen (1), United States (1: Texas)

• Carboniferous of Argentina (1), Australia (8), Bolivia (1), Chile (1), Egypt (1), France (1), India (4), Ireland (1), Peru (2), the Russian Federation (3), United States (112: Alaska, Arizona, Arkansas, California, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Missouri, Nevada, New Mexico, Oklahoma, Tennessee, Texas, Utah)

• Devonian of Afghanistan (2), Armenia (3), Belgium (4), Canada (1: Alberta), France (1), Iran (6), United States (20: Missouri, Ohio)

Total: 544 collections including 587 occurrences