• Quaternary of Canada (9: New Brunswick, Ontario, Yukon collections), United States (144: Alabama, Alaska, Arkansas, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Maryland, Michigan, Minnesota, Mississippi, Nebraska, New Jersey, New York, Ohio, Oklahoma, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Virginia, West Virginia, Wisconsin)

• Blancan of United States (14: Florida, Kansas, Nebraska, Oregon, South Dakota, Washington)

• Pliocene of China (1)

• Hemphillian of United States (42: Arizona, California, Florida, Idaho, Montana, Nebraska, Nevada, New Mexico, Oklahoma, Oregon, Washington)

• Miocene of Bulgaria (1), Canada (1: Saskatchewan), China (10), France (3), Kazakhstan (1), Spain (8), Turkey (1), United States (73: California, Colorado, Delaware, Florida, Georgia, Idaho, Kansas, Montana, Nebraska, Nevada, Oregon, South Dakota, Wyoming)

• Oligocene of China (1)

Total: 309 collections including 323 occurrences