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New barnacle records from the Upper Cretaceous of Alabama

Collins (1973), in a major systematic study of the Upper Cretaceous cirripeds of the eastern Gulf Coast, described four species of Cretiscalpellum, four of Arcoscalpellum, one of Virgiscalpellum (with two subspecies), and one of Brachylepas. In a companion paper, Mellen (1973) analyzed the stratigraphic and geographic distribution of these species and established the following biostratigraphic zones (Figure 1):