Amastra nubilosa

The length of the shell attains 22.3 mm, its diameter 11 mm. The shell is imperforate, oblong-conic, moderately robust, and lusterless. The apical whorls vary in color from white to light brown or pink, while the remaining whorls are cream-white and adorned with a thin cuticle. This cuticle features intricate olive-brown zigzag or V-shaped markings and narrow streaks, which often merge near the outer lip but are absent in front of the aperture. The spire is slightly convexly conic, with the penultimate whorl showing some degree of bulging. The second embryonic whorl displays fine, closely spaced, curved striae, while the subsequent whorl exhibits weaker striae except near the suture. The later whorls are decorated with low growth wrinkles, more pronounced near the suture. Both the penultimate and final whorls are distinctly convex. The shell's thin cuticle is characterized by distinctive zigzag or V-shaped olive-brown markings on a very pale background, contributing to its unique appearance. This variegation is often accentuated by the partial loss of the cuticle. While most specimens display these zigzag patterns, a few may lack them, exhibiting only subtle mottling or streaking. On the latter half of the body whorl, the cuticle may appear predominantly dark with occasional light streaks. …