• Silurian of United States (1: Alaska collection)

• Dobrotivian of the Czech Republic (1)

• Whiterockian of Canada (4: Newfoundland and Labrador)

• Arenigian of United States (2: Alaska)

• Arenig of China (5), Norway (1), the United Kingdom (1)

• Ningkuo of China (10)

• Ordovician of Argentina (9), Australia (1), Bolivia (1), Canada (8: British Columbia, New Brunswick, Northwest Territories, Quebec, Québec, Yukon), China (35), Lithuania (3), New Zealand (33), Norway (3), Peru (1), the Russian Federation (10), Sweden (3), the United Kingdom (2), United States (31: Alaska, Idaho, Michigan, Nevada, New York, Oklahoma), Venezuela (1)

Total: 166 collections including 226 occurrences