• Miocene of United States (3: Massachusetts collections)

• Eocene of United States (55: Alabama, Alaska, California, Georgia, Louisiana, Mississippi, Texas, Virginia)

• Paleocene to Eocene of United States (6: Virginia)

• Paleocene of United States (13: California, Mississippi, Missouri, Virginia)

• Cretaceous of China (1), Romania (1)

Total: 79 collections each including a single occurrence