• Devonian of Canada (2: New Brunswick, Quebec collections), the Czech Republic (6), Germany (1), United States (1: New York)

• Silurian of Canada (3: Ontario, Québec), China (6), the Czech Republic (5), the United Kingdom (1), United States (31: Alaska, Illinois, Indiana, New York, Wisconsin)

• Whiterockian of United States (1: Nevada)

• Arenig of Argentina (1), Australia (1), Bolivia (1), China (4), France (1), Morocco (1), United States (1: Montana)

• Klabava of the Czech Republic (1)

• Dawan of China (1)

• Ordovician to Silurian of the Russian Federation (1)

• Ordovician of Argentina (1), Australia (1), Canada (1: Quebec), China (7), the Czech Republic (1), Estonia (5), France (1), Latvia (2), Lithuania (6), New Zealand (2), Norway (3), the Russian Federation (2), Spain (1), the United Kingdom (2), United States (9: Montana, Nevada, Ohio, Oklahoma, Utah)

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

• Tremadoc of Argentina (3), Bolivia (3), Canada (1: Newfoundland and Labrador), China (35), Morocco (1), the Russian Federation (5), 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 (1), United States (1: Alaska)

Total: 176 collections including 196 occurrences

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