• Permian of Afghanistan (5 collections), Armenia (3), Azerbaijan (1), Canada (2: British Columbia, Yukon), China (59), Iran (14), Japan (12), Laos (1), Malaysia (2), Mexico (16), Myanmar (3), Oman (55), Pakistan (7), Peru (6), the Russian Federation (21), Thailand (9), Tunisia (1), Turkey (28), Ukraine (1), United States (145: Alaska, California, Idaho, Kansas, Montana, Nevada, New Mexico, Oregon, Texas, Utah, Wyoming), Vietnam (1)

• Carboniferous to Permian of United States (10: California, Texas)

• Carboniferous of Belize (3), China (2), India (2), Pakistan (1), the Russian Federation (2), Spain (1), Ukraine (4), United States (285: Arizona, California, Illinois, Iowa, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Mexico, Ohio, Oklahoma, Pennsylvania, Texas, Utah, Wyoming)

Total: 702 collections including 755 occurrences