Fig. 42 in Late Campanian (Cretaceous) Heteromorph Ammonites From The Western Interior Of The United States

Fig. 42. Exiteloceras jenneyi jenneyi (Whitfield, 1877). A. USNM 482482, USGS Mesozoic locality D304 (fig. 2, loc. 35). B, C. USNM 12295, holotype, from ''limestone of the Fort Pierre Group, on the west side of Beaver Creek, southwest Black Hills'' (Whitfield, 1877: 40). Figures are ×1.