• Permian of Australia (1 collection), Austria (3), Azerbaijan (1), Canada (4: British Columbia, Nunavut), China (2), India (2), Indonesia (4), Italy (2), Laos (1), Slovenia (1), United States (6: Alaska, California), Vietnam (1)

• Namurian of Thailand (1)

• Carboniferous to Permian of United States (1: California)

• Carboniferous of Argentina (1), India (1), Italy (1), Mexico (1), Spain (1), Svalbard and Jan Mayen (3), the United Kingdom (10), United States (23: Alaska, Arizona, California, Iowa, Missouri, Montana, Texas)

• Givetian of France (2)

• Devonian of Australia (3), Belgium (7), Canada (22: Northwest Territories, Nunavut), China (14), the Czech Republic (2), France (9), Germany (8), Italy (1), the Russian Federation (7), United States (17: Alaska, Colorado, Maryland, Nevada), Vietnam (3)

• Silurian of Canada (1: Quebec), United States (12: Alabama, Maryland, New York)

Total: 179 collections including 190 occurrences