New species of Gastrocopta from Argentina (Mollusca Eupulmonata Gastrocoptidae)

Abstract

: The species of Gastrocopta here described share the angular lamella united with the parietal lamella at the inner end of the former, giving the shape of a “Y”. We describe two new species inhabiting the central and northern part of Argentina, and we report G. iheringi (Suter, 1900), which has the same structural feature, for the first time in the country. Present species of Gastrocopta live in Argentine temperate and tropical areas, but previous records indicate that the most ancient fossil record with such a characteristic anguloparietal lamella is from the Early Miocene of Santa Cruz Province (southern Patagonia).