354 Neogene Paleontology in the Northern Dominican Republic 18

Neogene Paleontology in the Northern Dominican Republic: 18. The super family Volutacea (in part) (Mollusca: Gastropoda) - BAP #354 This study concerns a group of taxa formerly included in the Superfamily Volutacea, most characterized by the presence of columellar plications. In all there are 19 species, divided among eight genus-group taxa. Numerically, the largest genera are Vasum, with six species, and Turbinella, with four species. The other groups include only a few species each: Scaphella s.s.- 1; Lyria s.s. – 3; Lyria (Enaeta) -1; Harpa-1; Morum s.s. -1; and Morum (Oniscidia)-2. Only one species, Scaphella (Scaphella) striata (Gabb), occurs in beds of the Gurabo Formation that represent deep-water deposition. All other occur in shallow-water beds, often in association with coralline facies. The shallow-water portion of the Gurabo Formation contains the largest number of species, 11 in all; however, only two are confined to these beds, the other also in the other shallow-water