• Devonian of Norway (1 collection)

• Silurian of Canada (1: Northwest Territories), United States (3: Alaska, Michigan, New York)

• Chazyan of Canada (3: Ontario, Quebec), United States (2: New York, Virginia)

• Whiterockian of Canada (1: Northwest Territories), United States (5: Nevada, Oklahoma, Virginia)

• Ordovician of Argentina (1), Canada (6: Newfoundland, Northwest Territories, Nunavut, Ontario), United States (48: Georgia, Indiana, Kentucky, Missouri, Nevada, New York, Tennessee, Virginia)

Total: 71 collections including 73 occurrences