• Quaternary of Canada (3: Newfoundland and Labrador, Nunavut, Quebec collections), Greenland (1), Iceland (1), Ireland (1), Spain (1), the United Kingdom (3), United States (5: Alaska, Massachusetts, Oregon, Virginia)

• Pliocene of Belgium (3), Iceland (1), the United Kingdom (4), United States (6: Alaska, California)

• Miocene to Pliocene of United States (2: Alaska)

• Miocene of Denmark (1), United States (4: Alaska)

• Oligocene of Japan (3), the Russian Federation (2), United States (6: Alaska, Washington)

• Eocene to Oligocene of United States (2: Washington)

• Eocene of Japan (1), United States (3: Oregon, Washington)

• Paleocene of Antarctica (1), Argentina (1)

Total: 55 collections including 57 occurrences