• Permian of Italy (2 collections), Japan (2), Pakistan (2), the United Kingdom (1), United States (1: Texas)

• Carboniferous of United States (2: Virginia)

• Devonian of Antarctica (5), Argentina (3), Australia (5), Brazil (23), Canada (3: New Brunswick, Northwest Territories, Quebec), China (11), Colombia (1), France (1), Germany (5), Ghana (1), Libya (3), Morocco (4), New Zealand (3), Poland (7), the Russian Federation (1), South Africa (14), Spain (3), Turkey (1), United States (166: Alaska, Florida, Maryland, New York, Ohio, Pennsylvania), Uruguay (1)

• Silurian to Devonian of Argentina (1), Poland (2), Spain (1)

• Silurian of Argentina (6), Australia (2), Bolivia (1), Canada (14: Nova Scotia, Ontario, Québec), France (1), Lithuania (1), Paraguay (2), Poland (1), the Russian Federation (1), Sweden (2), the United Kingdom (21), United States (24: New York, Ohio)

• Arenig of France (2)

• Ordovician of Australia (2), Canada (6: Ontario, Quebec), China (1), the Czech Republic (2), Morocco (1), Norway (3), South Korea (1), the United Kingdom (12), United States (44: Illinois, Iowa, Indiana, Iowa, Kentucky, Michigan, Minnesota, Minnesota, Illinois, Iowa, Minnesota, Iowa, Wisconsin, Illinois, New York, Ohio, Pennsylvania, Virginia)

• Tremadoc of China (1)

Total: 426 collections including 494 occurrences