• Triassic of China (2 collections), Italy (4), Peru (1), United States (2: Alaska)

• Ordovician of Argentina (2), Australia (14), Canada (87: Alberta, British Columbia, Manitoba, Newfoundland, Newfoundland and Labrador, Northwest Territories, Nunavut, Nunvait, Ontario, Quebec, Yukon), China (26), the Czech Republic (1), Estonia (2), Greenland (4), Malaysia (3), Norway (6), the Russian Federation (2), Svalbard and Jan Mayen (8), Thailand (1), the United Kingdom (2), United States (153: Alabama, Alaska, Arkansas, British Columbia, California, Colorado, Georgia, Illinois, Illinois, Iowa, Kentucky, Minnesota, Missouri, Montana, Nevada, New Mexico, New York, North Dakota, Oklahoma, Pennsylvania, Tennessee, Texas, Utah, Vermont, Virginia, Wisconsin, Wyoming)

• Llandeilo of Australia (3), China (4), United States (1: California)

• Chazy of Canada (3: Quebec), United States (26: New York, Vermont)

• Whiterockian of Canada (5: Newfoundland, Newfoundland and Labrador), United States (23: California, Nevada, Oklahoma)

• Castlemainian of Australia (1)

• Arenig of Argentina (6), Australia (1), Bolivia (1), China (12), United States (1: Montana)

• Arenigian of Argentina (1)

• Cassinian of Canada (9: Newfoundland, Newfoundland and Labrador, Quebec), Greenland (1), the United Kingdom (1), United States (17: Arkansas, Missouri, Oklahoma, Vermont)

• Dawan of Mongolia (1)

• Canadian of United States (1: Maryland)

• Jeffersonian of Canada (1: Newfoundland)

Total: 439 collections including 538 occurrences