• Carboniferous of Australia (50 collections), Canada (7: Alberta, Yukon), China (1), Germany (2), Iran (2), Ireland (1), Mexico (1), the United Kingdom (33), United States (33: Arkansas, California, Idaho, Illinois, Indiana, Iowa, Missouri, Montana, Oklahoma, Texas, Utah)

• Givetian of France (4), United States (1: Missouri)

• Devonian to Carboniferous of the United Kingdom (2)

• Devonian of Afghanistan (4), Argentina (1), Australia (19), Canada (35: Northwest Territories, Nunavut, Ontario, Quebec, Yukon, Yukon Territory), China (18), Colombia (16), the Czech Republic (23), France (28), Germany (22), Italy (3), Kyrgyzstan (1), Libya (2), Mongolia (1), Morocco (4), Myanmar (2), Poland (5), the Russian Federation (11), Spain (10), Tajikistan (1), Turkey (1), Ukraine (6), United States (107: California, Colorado, Michigan, Nevada, New York, Oklahoma, Pennsylvania, Tennessee, West Virginia, Maryland, Pennsylvania), Venezuela (3), Vietnam (3)

• Whitwellian of Canada (3: Northwest Territories)

• Jaani of Estonia (22), Lithuania (6)

• Niagaran of Canada (3: Québec)

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

• Silurian of Afghanistan (1), Argentina (10), Australia (12), Belarus (5), Bolivia (1), Canada (97: New Brunswick, Northwest Territories, Nova Scotia, Nunavut, Ontario, Quebec, Québec), China (16), the Czech Republic (25), Estonia (36), Greenland (3), Iran (1), Ireland (1), Kazakhstan (1), Latvia (3), Lithuania (40), Mexico (15), Mongolia (9), Norway (30), Poland (1), the Russian Federation (14), Spain (2), Sweden (70), Ukraine (2), the United Kingdom (136), United States (197: Arkansas, California, Illinois, Indiana, Iowa, Maine, Maryland, Missouri, Nevada, New Hampshire, New York, Oklahoma, Tennessee, West Virginia, Wisconsin), Venezuela (3)

• Dobrotivian of France (2), Spain (1)

• Uhaku of Estonia (7)

• Letna of the Czech Republic (1)

• Whiterockian of United States (4: Nevada)

• Chazyan of Canada (7: Northwest Territories, Quebec), United States (52: New York, Tennessee, Vermont, Virginia)

• Arenig of China (2)

• Ordovician to Silurian of Canada (3: Québec), the Russian Federation (1)

• Ordovician of Argentina (1), Australia (5), Belarus (4), Belgium (12), Bolivia (2), Canada (155: British Columbia, Manitoba, Newfoundland, Northwest Territories, Northwest Terrorities, Nunavut, Nunvait, Ontario, Quebec, Québec), China (55), the Czech Republic (12), Estonia (189), France (5), Iran (5), Ireland (8), Italy (1), Kazakhstan (7), Latvia (29), Lithuania (23), Mongolia (2), Morocco (1), Myanmar (3), New Zealand (1), North Korea (1), Norway (50), Peru (1), Portugal (3), the Russian Federation (5), South Korea (1), Spain (16), Sweden (22), Turkey (1), the United Kingdom (226), United States (1177: Alaska, British Columbia, California, Georgia, Idaho, Illinois, Illinois, Iowa, Indiana, Kentucky, Maryland, Michigan, Minnesota, Missouri, Nevada, New York, Ohio, Oklahoma, Pennsylvania, Pennsylvania and Virginia, Tennessee, Virginia, Wisconsin), Venezuela (1)

• Tremadoc of China (2)

Total: 3337 collections including 3919 occurrences