• Permian of Cambodia (1 collection), China (3), Iran (1), Japan (1), Myanmar (1), Pakistan (4), the Russian Federation (1), the United Kingdom (4), United States (6: Alaska)

• Carboniferous of Svalbard and Jan Mayen (1), the United Kingdom (1), United States (11: Alaska, Arizona, Iowa, Kentucky)

• Devonian of Belgium (1), China (1), Germany (2), Iran (1)

• Silurian of China (1), the United Kingdom (1), United States (4: New York)

• Arenigian of United States (1: Maine)

• Ordovician of Argentina (1), Canada (4: Northwest Territories, Ontario, Quebec), China (1), Estonia (1), France (2), Sweden (1), United States (62: Indiana, Kentucky, Maryland, Michigan, Minnesota, Nevada, New York, Ohio, Oklahoma, Tennessee, Virginia)

Total: 119 collections including 137 occurrences