Distribution:
• Quaternary of Saudi Arabia (1 collection)
• Miocene of Colombia (1), United States (1: Nebraska)
• Oligocene of Italy (2)
• Eocene of French Guiana (1), the United Kingdom (1)
• Paleocene of French Guiana (2)
• Cretaceous of Argentina (4), Costa Rica (1), Sudan (17), Turkmenistan (1), United States (1: Wyoming)
• Jurassic of Colombia (1), Slovakia (1)
• Triassic of Canada (1: British Columbia), Italy (3), Norway (1), Slovakia (1), United States (2: Utah)
• Permian of China (1), Malaysia (1), Norway (1), Tunisia (2), United States (3: Nevada, Utah)
• Virgilian of United States (51: New Mexico, Texas)
• Atokan of United States (1: New Mexico)
• Pennsylvanian of United States (2: New Mexico)
• Chesterian of United States (2: Montana)
• Carboniferous of Spain (5), United States (20: Texas, Utah)
• Devonian of Austria (4), Canada (3: Alberta, Nunavut, Quebec), China (1), the Czech Republic (1), Germany (2), Italy (1), Spain (1), United States (4: Nevada, New York)
• Silurian of Australia (1), China (1), the Czech Republic (3), Estonia (1), Norway (3), the Russian Federation (2), Sweden (14), Ukraine (1), the United Kingdom (1), United States (6: Iowa, Maryland, New York)
• Ordovician of Argentina (1), Canada (1: Ontario), China (2)
• Llandeilo of the United Kingdom (1)
• Cambrian of Canada (14: British Columbia), United States (1: Nevada)
Total: 202 collections including 213 occurrences