• Silurian of the United Kingdom (9 collections)

• Uhaku of Belarus (1), Estonia (1), the Russian Federation (2), Sweden (5)

• Dobrotivian of Portugal (1)

• Whiterockian of Canada (13: Newfoundland and Labrador, Northwest Territories, Quebec), United States (21: Nevada, New York, Oklahoma, Vermont, Virginia)

• Chazyan of Canada (21: Northwest Territories, Quebec), United States (18: New York, Oklahoma, Tennessee)

• Valaste of Sweden (2)

• Arenig of China (1), France (1), Morocco (1)

• Ordovician to Silurian of the Russian Federation (1)

• Ordovician of Belarus (4), Belgium (3), Canada (65: British Columbia, Newfoundland, Northwest Territories, Nunavut, Nunvait, Ontario, Quebec, Québec), China (2), Estonia (81), France (1), Germany (1), Ireland (10), Latvia (10), Lithuania (12), the Netherlands (1), Norway (56), the Russian Federation (98), Spain (5), Sweden (47), the United Kingdom (52), United States (168: Alaska, California, Colorado, Georgia, Illinois, Illinois, Iowa, Indiana, Iowa/Wisconsin, Kentucky, Minnesota, Missouri, Nevada, New York, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia)

• Ibexian of United States (1: Nevada)

Total: 715 collections including 860 occurrences