Diancta macrostoma (Mousson, 1870). 2 Lectotype ZMZ 526691 Fiji, Ovalau, H = 2.84 mm 3 paratype, last whorl opened to show internal lamellae (enlarged, not to scale) 4 operculum 4a inner surface 4b outer surface. Figure 1 ×10, Figure 3 ×40 magnification.