The present species is characterized by 1) turriculate, straight-sided, relatively slender shell attaining 11.5 mm in height, 2) protoconch small, conical, of 3 convex smooth whorls, 3) teleoconch whorls convex, meeting at deep, nearly fenestrate sutures, 4) base apparently fenestrate but actually imperforate, 5) thick peristome and 6) sculpture of 8 thick, continuous, broadly reflexed axial lamellae rising across suture; intervals smooth and shining. The Thai material conforms to the figure of the holotype of Scalaria angusta Dunker, 1861, published by JANSSEN (1993). This taxon was previously assigned to Laeviscala de Boury, 1909, which is characterized by intercostal spaces with cancellate microsculpture. The smooth intercostal spaces favor the allocation in the subgenus Nitidiscala de Boury, 1909.
DISTRIBUTION AND HABITAT. The species ranges from the Gulf of Thailand to the Philippines and Japan. It is a sand-related element occurring in the 5-30 m depth range (HABE, 1968). FOSSIL RECORDS. Pleistocene of Japan.