• Givetian of France (5 collections)

• Devonian of Australia (5), Canada (30: British Columbia, Northwest Territories, Nunavut, Yukon, Yukon Territory), China (1), Czechia (8), Italy (1), Morocco (3), Poland (8), Ukraine (4), United States (23: Iowa, Nevada, New Mexico, New York, Tennessee)

• Whitwellian of Canada (4: Northwest Territories)

• Jaani of Estonia (7), Lithuania (4)

• Niagaran of Canada (2: Québec)

• Silurian to Devonian of Poland (1), United States (1: Oklahoma)

• Silurian of Australia (3), Belarus (3), Canada (24: New Brunswick, Northwest Territories, Nunavut, Quebec, Québec, Yukon, Yukon Territory), China (5), Czechia (6), Estonia (34), Iran (1), Ireland (1), Latvia (1), Lithuania (32), Mexico (1), Norway (24), the Russian Federation (1), Sweden (6), Ukraine (1), the United Kingdom (96), United States (49: California, Illinois, Indiana, Iowa, Missouri, Nevada, New York, Oklahoma, Tennessee, Wisconsin), Venezuela (1)

• Chazyan of Canada (1: Northwest Territories), United States (1: Alabama)

• Whiterockian of United States (4: Nevada)

• Arenig of Argentina (2), China (3), the United Kingdom (5)

• Arenigian of Argentina (4)

• Dawan of China (1)

• Ordovician to Silurian of Norway (1)

• Ordovician of Australia (4), Belgium (9), Canada (12: Northwest Territories, Nunavut, Ontario, Quebec, Québec), China (29), Estonia (11), Ireland (9), Italy (1), Kazakhstan (4), Latvia (1), Lithuania (5), Myanmar (1), Norway (16), Portugal (1), the Russian Federation (2), Sweden (5), Türkiye (1), the United Kingdom (56), United States (65: Alaska, California, Illinois, Iowa, Maine, Minnesota, Nevada, Oklahoma, Pennsylvania, Tennessee, Virginia, Wisconsin)

Total: 650 collections including 681 occurrences