• 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 (12), Peru (6), the Russian Federation (21), Thailand (9), Tunisia (1), Turkey (28), Ukraine (1), United States (143: 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 (271: Arizona, California, Illinois, Iowa, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Mexico, Ohio, Oklahoma, Pennsylvania, Texas, Utah, Wyoming)

Total: 691 collections including 743 occurrences