• Permian of Afghanistan (3 collections), Armenia (9), Australia (4), Azerbaijan (18), Bolivia (26), Cambodia (2), Canada (6: British Columbia, Nunavut), China (231), Croatia (2), East Timor (1), Indonesia (1), Iran (64), Italy (9), Japan (14), Laos (1), Malaysia (7), Myanmar (4), Nepal (8), New Zealand (1), Oman (3), Pakistan (67), Peru (4), the Russian Federation (19), Slovenia (1), Svalbard and Jan Mayen (2), Tajikistan (1), Thailand (11), Tunisia (26), Turkey (6), Ukraine (4), United States (287: Alaska, Arizona, California, New Mexico, Oregon, Texas, Utah, Wyoming), Venezuela (3)

• Carboniferous to Permian of China (1)

• Carboniferous of Australia (2), Bolivia (4), Brazil (1), Canada (4: Northwest Territories, Nunavut), China (3), Ireland (3), Libya (1), Malaysia (1), Peru (1), South Korea (1), Spain (1), the United Kingdom (21), United States (157: Alaska, Arkansas, Illinois, Iowa, Kansas, Missouri, Nevada, New Mexico, Oklahoma, Pennsylvania, Texas, Utah)

Total: 1046 collections including 1259 occurrences