• Permian of Armenia (5 collections), Azerbaijan (13), Canada (1: Yukon), China (9), Colombia (1), Iran (14), Japan (2), Kazakhstan (3), Mexico (1), Pakistan (15), the Russian Federation (5), Tajikistan (1), United States (28: Arizona, Kansas, New Mexico, Texas, Wyoming)

• Carboniferous of Morocco (1), the Russian Federation (20), Ukraine (1), United States (33: Illinois, Kansas, Kentucky, Missouri, Oklahoma, Pennsylvania, Texas)

Total: 153 collections including 219 occurrences