Zilchogyra franzi Weyrauch, 1965 (Gastropoda: Charopidae), a minute landsnail rediscovered in Sierra de la Ventana (Southern Pampas, Argentina)

Abstract

Zilchogyra franzi was described on the basis of a single specimen (holotype in Fundación Miguel Lillo: FML 1217, Fig. 1) from the Ventania mountain system (Weyrauch 1965b) and this was so far the only publication on this species. Weyrauch (1965b) described the shell and gave a brief account of the habitat, based on the information provided by the collector Dr. Herbert Franz. Franz had found Z. franzi in a ravine in Sierra de la Ventana, in a humid hollow in the rock, lined with dark soil with ferns and “bromeliads” (probably Eryngium spp., Apiaceae).