• Silurian of Canada (11: New Brunswick, Northwest Territories, Nunavut, Quebec, Québec collections), China (5), Estonia (9), Lithuania (5), Mongolia (7), the Russian Federation (11), Sweden (5), the United Kingdom (3), United States (6: California, Nevada, Utah)

• Whiterockian of United States (2: California)

• Ordovician to Silurian of Canada (2: Québec), United States (1: California)

• Ordovician of Australia (22), Belgium (2), Canada (116: British Columbia, Manitoba, Northwest Territories, Nunavut, Ontario, Quebec, Québec), China (17), the Czech Republic (2), Estonia (5), Latvia (1), Lithuania (1), Norway (4), the Russian Federation (5), the United Kingdom (28), United States (980: Alabama, Alaska, California, Colorado, Georgia, Idaho, Illinois, Iowa, Indiana, Iowa, Kentucky, Maryland, Michigan, Minnesota, Missouri, Nevada, New Mexico, New York, Ohio, Pennsylvania, Pennsylvania and Virginia, Tennessee, Texas, Virginia, Wyoming)

Total: 1250 collections including 1352 occurrences