• Carboniferous of Ireland (1 collection)

• Devonian of Canada (2: New Brunswick, Quebec), Colombia (1), the Czech Republic (9), Germany (2), United States (1: New York)

• Silurian of Canada (3: Ontario, Québec), China (6), the Czech Republic (6), the United Kingdom (1), United States (33: Alaska, Illinois, Indiana, New York, Oklahoma, Wisconsin)

• Whiterockian of United States (1: Nevada)

• Klabava of the Czech Republic (1)

• Arenig of Argentina (1), Australia (1), Bolivia (1), China (5), France (1), Morocco (1), United States (1: Montana)

• Dawan of China (2)

• Ordovician to Silurian of the Russian Federation (1)

• Canadian of United States (2: Idaho, Utah)

• Ordovician of Algeria (1), Argentina (1), Australia (1), Canada (1: Quebec), China (8), the Czech Republic (2), Estonia (6), France (1), Latvia (2), Lithuania (6), New Zealand (2), Norway (3), the Russian Federation (8), Spain (2), the United Kingdom (2), United States (10: Montana, Nevada, Ohio, Oklahoma, Utah), Venezuela (1)

• Tremadoc of Argentina (3), Bolivia (3), Canada (1: Newfoundland and Labrador), China (46), the Czech Republic (1), Morocco (1), the Russian Federation (6), Sweden (1), United States (4: Montana, New York, Utah, Vermont)

• Cambrian of Australia (1), Canada (2: Northwest Territories), China (1), Poland (1), the Russian Federation (2), United States (2: Alaska, Montana)

Total: 215 collections including 322 occurrences