• Dobrotivian of the Czech Republic (1 collection), France (4), Morocco (1), Portugal (4), Spain (14)

• Letna of the Czech Republic (1)

• Whiterockian of Canada (35: Newfoundland, Newfoundland and Labrador, Northwest Territories, Quebec), Norway (2), United States (66: California, Nevada, New York, Oklahoma, Utah, Vermont)

• Chazyan of Canada (8: Newfoundland and Labrador, Quebec), United States (27: New York, Oklahoma, Tennessee)

• Fennian of France (1), United States (1: Nevada)

• Volkhov of the Russian Federation (2)

• Valaste of Sweden (1)

• Arenigian of Canada (1: Northwest Territories), China (10), United States (5: Nevada, Utah)

• Dawan of China (2)

• Arenig of Argentina (6), Australia (3), Bolivia (1), Canada (1: Newfoundland and Labrador), China (11), France (1), Greenland (1), the Russian Federation (2), Sweden (3), the United Kingdom (4)

• Canadian of Canada (2: Northwest Territories, Québec)

• Ordovician of Argentina (18), Australia (52), Canada (16: Alberta, British Columbia, Newfoundland, Newfoundland and Labrador, Ontario), China (80), the Czech Republic (1), Estonia (2), France (1), Iran (2), Italy (2), Kazakhstan (4), Morocco (5), Norway (4), the Russian Federation (14), Spain (25), Sweden (21), the United Kingdom (14), United States (201: California, Idaho, Iowa/Wisconsin, Montana, Nevada, Utah, Virginia)

• Tremadoc of Argentina (21), Bolivia (1), Canada (14: Alberta), China (1), the Russian Federation (6), Sweden (2)

• Ibexian of Canada (2: Quebec), Norway (1), United States (1: Nevada)

Total: 732 collections including 839 occurrences