Inoceramid data were used to characterize the lower Maastrichtian strata in Western Fore-Balkan (Bulgaria), based on newly discovered Oslen Krivodol section. The upper part of Kunino Formation yielded a well-defined inoceramid-bearing level. A number characteristic taxa make up inoceramid assemblage, including Cataceramus palliseri (Douglas, 1942), C. subcircularis (Meek, 1876), barabini (Morto...