• Miocene of Japan (1 collection)

• Eocene of United States (2: Colorado, Oregon)

• Clarkforkian of United States (2: Wyoming)

• Paleocene of United States (25: Colorado, Montana, North Dakota, Wyoming)

• Givetian of Canada (1: Northwest Territories)

• Devonian of Canada (4: Northwest Territories, Nunavut)

• Silurian of Brazil (1), Canada (1: Ontario), China (2), Paraguay (1), the United Kingdom (4)

• Dobrotivian of Czechia (1), France (3), Spain (3)

• Whitlandian of the United Kingdom (3)

• Arenig of Argentina (7), China (1), France (3), the United Kingdom (1)

• Ordovician of Argentina (5), Australia (6), Canada (4: Ontario), China (6), Czechia (10), Norway (1), Spain (1), Sweden (1), the United Kingdom (8), United States (40: Indiana, Kentucky, Maryland, Minnesota, Minnesota, Illinois, Iowa, Missouri, New York, Ohio, Virginia)

Total: 148 collections including 172 occurrences