• Permian of Afghanistan (1 collection), Canada (1: Nunavut), China (2), Greece (1), Iran (1), Japan (5), Laos (1), Malaysia (1), Peru (1), the Russian Federation (3), Tunisia (1), United States (32: Alaska, Arizona, Texas, Utah), Vietnam (1)

• Carboniferous of Ireland (1), Poland (3), the United Kingdom (6), United States (73: Alabama, Alaska, Arizona, Arkansas, California, Illinois, Indiana, Iowa, Kansas, Kentucky, New Mexico, Ohio, Oklahoma, Pennsylvania, Tennessee, Texas, Utah)

• Givetian of France (1), United States (1: New York)

• Devonian of Australia (3), China (1), the Czech Republic (1), France (1), Germany (3), the United Kingdom (2), United States (33: Illinois, Missouri, New York, Ohio, Pennsylvania), Venezuela (2)

• Niagaran of United States (1: Indiana)

• Silurian of Canada (1: Manitoba), Paraguay (2), the Russian Federation (2), the United Kingdom (1)

• Dobrotivian of France (2), Spain (4)

• Uhaku of Sweden (1)

• Chazyan of United States (4: Alabama, New York)

• Whiterockian of United States (1: Virginia)

• Arenig of China (1)

• Ordovician of Australia (1), Canada (39: Nunavut, Ontario, Quebec, Québec), China (2), the Czech Republic (4), Estonia (7), France (1), Germany (1), Kyrgyzstan (2), Morocco (5), North Korea (1), Norway (3), Portugal (1), Spain (3), Sweden (4), the United Kingdom (8), United States (85: Arkansas, California, Illinois, Illinois, Iowa, Indiana, Kentucky, Minnesota, Missouri, Nevada, New York, Ohio, Oklahoma, Tennessee, Utah, Virginia, Wisconsin)

Total: 369 collections including 449 occurrences