• Quaternary of Canada (4: Alberta, Saskatchewan collections), Mexico (3), United States (167: Arizona, California, Colorado, Florida, Idaho, Kansas, Maryland, Montana, Nebraska, Nevada, New Mexico, Oklahoma, Oregon, Pennsylvania, South Dakota, Texas, Utah, West Virginia)

• Blancan of United States (28: California, Idaho, Nebraska, Nevada, Washington)

• Hemphillian of United States (3: California, Nebraska)

• Miocene of United States (3: California)

Total: 208 collections including 222 occurrences