• Carboniferous of Australia (1 collection), Canada (1: Nunavut), Mexico (1), United States (11: Illinois, Iowa, Missouri, Montana, Oklahoma, Texas)

• Devonian of Afghanistan (1), Austria (1), Belarus (1), Belgium (7), Canada (1: Ontario), China (2), Czechia (12), Germany (3), Italy (2), Morocco (3), Myanmar (2), Poland (1), the Russian Federation (6), Ukraine (3), United States (12: Maryland, Missouri, Montana, New York, West Virginia, Maryland, Pennsylvania)

• Whitwellian of Canada (3: Northwest Territories)

• Niagaran of Canada (1: Québec)

• Silurian of Canada (29: Northwest Territories, Nunavut, Ontario, Québec, Yukon Territory), Czechia (3), Italy (1), Mexico (9), Mongolia (1), the Russian Federation (6), Spain (1), United States (37: Arkansas, California, Illinois, Indiana, Iowa, Missouri, Oklahoma, Tennessee, Wisconsin), Venezuela (1)

• Ordovician of the United Kingdom (1)

Total: 164 collections including 174 occurrences