"Five miles southeast of mouth of Pat O'Hara Creek, Clark's Fork Basin, Wyoming", United States [details]
"East Fork of Torrejon Arroyo, New Mexico", United States [details]
"Three miles southeast of mouth of Pat O'Hara Creek, Wyoming", United States [details]
"Big Horn Basin, Wyoming" (no exact locality provided), USA; Wasatchian, early Eocene [details]