• Cretaceous of Canada (1: Nova Scotia collection)

• Jurassic of Canada (1: Nova Scotia), Indonesia (1), Slovenia (1), Spain (1)

• Triassic of Australia (1), Austria (7), Hungary (1), India (1), Iran (1), Romania (1), the Russian Federation (5), Slovenia (8), Tajikistan (2), United States (7: Alaska, California, Nevada, Oregon)

• Permian of Canada (6: British Columbia, Nunavut), China (4), Iran (1), Italy (1), United States (53: Nevada, New Mexico, Texas, Wyoming), Venezuela (4)

• Carboniferous of United States (2: Arkansas, Oklahoma)

• Devonian of Australia (6), Belgium (2), Canada (1: Alberta), France (1), Germany (1), Poland (2), United States (1: Michigan)

• Silurian of Canada (33: Northwest Territories, Nunavut, Quebec), Kazakhstan (1), United States (7: Indiana, Tennessee)

• Chazyan of Canada (7: Quebec), United States (10: New York, Tennessee, Vermont)

• Whiterockian of Canada (1: Newfoundland and Labrador), United States (13: California, Nevada)

• Arenig of Argentina (4), Canada (2: Newfoundland and Labrador), China (13), United States (8: Oklahoma, Texas)

• Arenigian of Argentina (2), Canada (1: Quebec), South Korea (1), United States (1: Nevada)

• Canadian of United States (1: Maryland)

• Ordovician of Argentina (7), Australia (7), Canada (9: British Columbia, Manitoba, Newfoundland, Newfoundland and Labrador, Nunavut, Quebec), China (12), Norway (1), South Korea (3), United States (80: California, Iowa, Kentucky, Minnesota, Missouri, Nevada, Oklahoma, Tennessee, Texas, Utah, Virginia)

• Tremadoc of Argentina (1), China (5), South Korea (1), United States (1: Utah)

• Ibexian of United States (1: Utah)

• Solvan of Argentina (1)

• Ordian of Australia (4)

• Delamaran of Canada (5: British Columbia)

• Cambrian of Antarctica (1), China (1), Iran (2), Kyrgyzstan (1), United States (10: California, Colorado, Nevada, Texas, Wyoming)

Total: 382 collections including 707 occurrences