• Permian of China (1 collection), the Russian Federation (2), United States (8: Nevada, New Mexico, Texas)

• Carboniferous to Permian of United States (2: California)

• Carboniferous of United States (9: Arizona, California)

• Devonian of Australia (4), Canada (1: Northwest Territories), the Czech Republic (3), France (3), Germany (1), Kazakhstan (1), Poland (3), United States (8: Alaska, New York, Ohio)

• Silurian of Canada (2: Ontario), China (1), the Czech Republic (3), Greenland (1), Norway (2), Sweden (4), Ukraine (1), United States (10: Iowa, Ohio, Virginia, Wisconsin)

• Ordovician of Canada (61: Manitoba, Newfoundland, Newfoundland and Labrador, Northwest Territories, Nunavut, Ontario, Quebec, Québec), China (1), Estonia (21), Germany (1), Greenland (2), Malaysia (3), North Korea (1), Norway (2), Sweden (1), United States (79: Alaska, California, Georgia, Illinois, Iowa, Kentucky, Minnesota, Missouri, Nevada, New Mexico, New York, Ohio, Tennessee, Virginia, Wisconsin)

• Chazy of United States (5: New York)

• Whiterockian of Canada (1: Newfoundland and Labrador), United States (2: Nevada)

• Cassinian of Canada (2: Quebec), the United Kingdom (1), United States (12: Missouri, Vermont)

Total: 265 collections including 497 occurrences