Argentina, Taxonomy, Holocene, Paleobiogeography, South America, Pleistocene, Atlantic Ocean, Paleoenvironment, Gastropoda, gastropod, Patagonia, Mollusca, bivalve, palaeoenvironments, Mytilus edulis, Bivalvia, Southamerica, fossil assemblage, Hypsithermal, littoral environment, Santa Cruz [Argentina], Acanthina, Adelomelon, Aequipecten tehuelchus, Ataxoceri...