Cymbiola nusatenggara (Nusa Tenggara volute)

Endemic to Nusa Tenggara (Sumbawa, Mojo Island, Labuan Bajo). It has a weakly ribbed protoconch compared to the smooth protoconch of the innexa and heavily ribbed ones of the vespertilio. C. mariaemma has also a weakly ribbed protoconch but it is more globulous.