• Permian of China (1 collection), Greenland (2), Indonesia (1), Mongolia (1), Peru (1), the Russian Federation (15), United States (3: Alaska, Texas)

• Namurian of Australia (1)

• Carboniferous of Antarctica (1), Argentina (1), Australia (2), Canada (1: Alberta), Germany (1), United States (43: Arkansas, California, Indiana, Iowa, Kentucky, Nevada, New Mexico, Tennessee)

• Devonian to Carboniferous of the United Kingdom (3)

• Devonian of Australia (9), Canada (4: Alberta, Manitoba, Quebec), China (1), Colombia (13), the Czech Republic (1), France (1), Germany (2), Italy (1), Kazakhstan (1), Morocco (2), New Zealand (2), Poland (2), the Russian Federation (1), Turkey (1), the United Kingdom (1), United States (90: Alaska, Indiana, Maryland, Nevada, New York, Ohio, Pennsylvania), Venezuela (1)

• Silurian of Australia (1), China (2), the Czech Republic (1), Poland (1), Sweden (7), the United Kingdom (5), United States (11: Indiana, New York, Tennessee, Wisconsin)

• Arenig of China (3)

• Ordovician of China (1), Sweden (2), the United Kingdom (1)

• Tremadoc of China (2)

Total: 247 collections including 258 occurrences