South side of Polecat Bench, north of Powell, Park County, Wyoming, United States; Tiffanian (zone Ti3-Ti4), ... [details]
15 miles west of Basin, Wyoming, United States; Wasatchian (zone Wa3-Wa4), Ypresian, early Eocene [details]
"East of Stein's (holotype); 15 miles west of Basin; both in Park County, Wyoming", United States [details]