There are 4 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 24851 | M. Carrano | Pretty Butte, Cannonball Creek (coll. 1963) Late Maastrichtian - Cretaceous 8 - North Dakota | Holland (1997) |
| 33437 | R. Lupia | Bergad & JWHall Slide #332-3, Morton Co., ND (= Slide 332-3, Morton Co., about 1 mile south of Huff, North Dakota (Hell Creek Fm., Pretty Butte Member)) Late Maastrichtian - Cretaceous 8 - North Dakota | Bergad and Hall (1971) |
| 137718 | R. Benson | Pretty Butte, UCMP loc. V.86095 (= UCMP V-86095) Late Maastrichtian - Cretaceous 8 - North Dakota | Holroyd and Hutchison (2002) |
| 137720 | R. Benson | Pretty Butte 2, UCMP loc. V.86096 (= UCMP V-86096) Late Maastrichtian - Cretaceous 8 - North Dakota | Holroyd and Hutchison (2002) |