• Quaternary of Japan (1 collection)

• Pliocene of Germany (1)

• Miocene to Pliocene of Japan (1)

• Miocene to Oligocene of United States (1: Montana)

• Miocene of China (1), Germany (4), Japan (1), Switzerland (1), United States (1: Montana)

• Oligocene to Miocene of Germany (1), United States (3: Montana)

• Oligocene of Czechia (1), United States (8: Idaho, Montana, Oregon)

• Eocene of Canada (3: British Columbia, Nunavut), China (3), the United Kingdom (1), United States (42: Alaska, California, Colorado, Idaho, North Dakota, Oregon, Washington, Wyoming)

• Clarkforkian of United States (25: North Dakota, Wyoming)

• Paleocene to Eocene of United States (2: Alaska)

• Tertiary of Japan (1)

• Paleocene of Canada (5: Alberta, Saskatchewan), China (2), the United Kingdom (2), United States (100: Alaska, Colorado, Montana, New Mexico, North Dakota, South Dakota, Wyoming)

• Cretaceous of United States (35: Colorado, New Mexico, North Dakota, Utah, Wyoming)

Total: 246 collections including 262 occurrences

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