• Permian of Australia (3 collections), Azerbaijan (1), Canada (1: Nunavut), Myanmar (1), the Russian Federation (1), United States (11: Alaska, Texas), Vietnam (1)

• Carboniferous of Argentina (2), Ireland (1), the Russian Federation (1), the United Kingdom (10), United States (22: Alaska, Georgia, Idaho, Iowa, Pennsylvania, Texas, Utah, Virginia)

• Devonian of Afghanistan (2), Australia (4), Austria (1), Canada (11: Alberta, New Brunswick, Northwest Territories, Ontario, Quebec), Czechia (3), Germany (5), Kazakhstan (10), Mongolia (1), Morocco (3), New Zealand (3), the Russian Federation (2), South Africa (4), Spain (11), the United Kingdom (1), United States (120: Alaska, Arizona, Colorado, Indiana, Iowa, Kentucky, New York, Ohio, Pennsylvania), Venezuela (1)

• Silurian of Canada (4: Northwest Territories, Ontario, Quebec), United States (34: Alaska, California, Illinois, New York, Wisconsin)

• Ordovician of Canada (2: Nunavut), United States (2: Illinois)

Total: 279 collections including 338 occurrences