Leuctotype. Complete adult internal mould with 4 whorls developed on both sides. Ribbing shows well and is interupted by a smooth ventral band. The last suture is visible and the body chamber occupies 4/5 whorl, shows uncurling of the umbilical seam and has a complete peristome on one side. From Saint Vigor, Calvados, France.
Size: 90 mm
Size: 90 mm