Studies on the Streptaxidae (Mollusca, Gastropoda, Pulmonata) of Malaŵi 13. Gulella menkhorsti Van Bruggen, 2011, and Gulella proxima spec. nov.¹

Gulella menkhorsti Van Bruggen, 2011, described from the Mpita Forest, Zomba District, Malaŵi, appears to be widely distributed in this country from the south to the north, albeit with an artificial (?) gap in Central Malaŵi. Details referring to individual variation are discussed; particular attention is drawn to the open umbilicus. North of about Mzuzu a species is found characterized by a densely costulate, seemingly similar, shell that on close examination reveals numerous differences such as the presence of a closed umbilicus and a lower columellar process in the aperture: G. proxima spec. nov