• Permian of Canada (3: Yukon collections), Mexico (3), the Russian Federation (2), United States (9: Idaho, Texas, Utah, Wyoming)

• Carboniferous of Argentina (2), Australia (1), Czechia (3), Iran (3), Peru (1), the United Kingdom (5), United States (25: Alaska, California, Colorado, Idaho, Indiana, Missouri, Montana, Nevada, New Mexico, Utah)

• Devonian of Afghanistan (6), Australia (3), Canada (27: Alberta, British Columbia, Northwest Territories, Northwest Territories and Yukon, Nunavut, Ontario, Yukon), China (16), Colombia (1), Czechia (4), France (1), Germany (5), Iran (6), Libya (10), Morocco (1), Poland (7), the Russian Federation (3), United States (553: Alaska, Arizona, Colorado, Iowa, Maryland, Michigan, Montana, Nevada, New Jersey, New Mexico, New York, Ohio, Oklahoma, Pennsylvania, Virginia)

• Silurian of Canada (2: Quebec, Québec), Czechia (3), Spain (1), United States (1: California)

Total: 707 collections including 755 occurrences