• Permian of Australia (24 collections), India (1), New Zealand (5), the Russian Federation (15), United States (5: Nevada, Oklahoma, Texas)

• Carboniferous of Belgium (1), Canada (1: Alberta), Iran (4), Ireland (1), Peru (1), the United Kingdom (6), United States (56: Arizona, Arkansas, California, Illinois, Indiana, Iowa, Kansas, Kentucky, Missouri, Montana, New Mexico, Ohio, Oklahoma, Texas, West Virginia)

• Devonian of Antarctica (1), Australia (7), Canada (6: Ontario), the Czech Republic (2), France (1), Germany (7), Italy (3), Morocco (2), the Russian Federation (1), the United Kingdom (4), United States (31: Alaska, Illinois, Indiana, Kentucky, Maine, Maryland, Michigan, New York, Ohio)

• Whitwellian of Canada (3: Northwest Territories)

• Silurian of Australia (1), Canada (9: Alberta, Northwest Territories, Quebec), Poland (1), Sweden (4), the United Kingdom (1), United States (4: California, Indiana, Oklahoma, Tennessee)

• Chazyan of Canada (1: Quebec), United States (11: New York, Vermont)

• Ordovician of Australia (1), Canada (1: Quebec), Estonia (1), Germany (2), Ireland (1), the Netherlands (1), Sweden (2), the United Kingdom (2), United States (10: Alabama, Illinois, Kentucky, Missouri, Oklahoma, Virginia)

• Cambrian of Australia (1)

Total: 242 collections including 290 occurrences