• Triassic of Austria (5 collections), China (1), Egypt (1), Germany (11), Hungary (7), India (2), Israel (6), Italy (15), Pakistan (2), Papua New Guinea (4), Poland (2), the Russian Federation (38), Slovakia (1), Spain (4), Svalbard and Jan Mayen (3), Switzerland (1), Tunisia (1), United States (24: Alaska, Nevada, Utah)

• Permian of Azerbaijan (6), China (52), Iran (13), Italy (11), Japan (8), Malaysia (1), Pakistan (13), Saudi Arabia (3), Thailand (1), United States (16: Arizona, Nebraska, New Mexico, Texas, Wyoming)

• Carboniferous of Kazakhstan (1), the Russian Federation (5), Ukraine (1), the United Kingdom (6), United States (44: Arkansas, Illinois, Maryland, Montana, Nevada, New Mexico, Oklahoma, Texas)

Total: 309 collections including 368 occurrences