• Permian of Afghanistan (1 collection), Australia (9), Austria (2), Bolivia (15), Canada (4: Nunavut), China (15), India (1), Indonesia (1), Iran (9), Italy (1), Japan (1), Mongolia (2), Nepal (2), Oman (11), Pakistan (1), Peru (9), the Russian Federation (31), Svalbard and Jan Mayen (7), Tajikistan (5), Thailand (2), the United Arab Emirates (2), United States (100: Alaska, Kansas, Nevada, New Mexico, Texas, Washington)

• Carboniferous of Australia (2), Bolivia (2), Canada (2: Northwest Territories), China (1), France (1), Ireland (4), Japan (1), Mongolia (3), Peru (3), the Russian Federation (1), Spain (12), Svalbard and Jan Mayen (1), the United Kingdom (8), United States (223: Alabama, Alaska, Arizona, California, Colorado, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Maryland, Missouri, Montana, Nebraska, Nevada, New Mexico, Ohio, Oklahoma, Pennsylvania, Tennessee, Texas, Utah, Virginia)

• Devonian of Belarus (1), Belgium (1), Canada (23: Alberta), China (2), France (2), Germany (3), Iran (1), Morocco (5), the Russian Federation (2), Spain (7), United States (16: Montana, New York, Virginia)

• Silurian of Sweden (1), the United Kingdom (2)

• Ordovician of Estonia (1)

Total: 562 collections including 621 occurrences