• Triassic of Afghanistan (1 collection), Austria (23), Bosnia and Herzegovina (6), Canada (1: British Columbia), China (17), Egypt (1), Germany (12), Hungary (19), India (11), Indonesia (2), Israel (7), Italy (23), Jordan (1), Kazakhstan (3), Malaysia (1), Nepal (1), New Zealand (1), Pakistan (4), Papua New Guinea (4), Poland (2), Romania (2), the Russian Federation (155), Slovakia (2), Slovenia (1), Spain (7), Svalbard and Jan Mayen (5), Switzerland (2), Tunisia (1), Türkiye (1), United States (53: Alaska, California, Idaho, Montana, Nevada, Utah)

• Permian of Armenia (10), Australia (1), Azerbaijan (21), Canada (1: Yukon), China (67), Colombia (2), India (1), Indonesia (2), Iran (13), Italy (12), Japan (11), Kazakhstan (5), Malaysia (2), Mexico (3), Pakistan (46), the Russian Federation (17), Saudi Arabia (3), Tajikistan (4), Thailand (1), Ukraine (1), United States (72: Arizona, California, Kansas, Nebraska, Nevada, New Mexico, Texas, Utah, Wyoming)

• Carboniferous of Algeria (1), Australia (2), Canada (5: Nova Scotia), Czechia (1), Ireland (20), Kazakhstan (9), Kyrgyzstan (1), Morocco (4), the Russian Federation (33), Ukraine (4), the United Kingdom (16), United States (112: Arizona, Arkansas, Illinois, Indiana, Kansas, Kentucky, Maryland, Missouri, Montana, Nevada, New Mexico, Ohio, Oklahoma, Pennsylvania, Texas, Utah)

Total: 872 collections including 1313 occurrences