Amastra rubens

The ovate aperture is bordered by a simple lip, thickened internally and tinged with a roseate hue, while the throat is white.

The first half-whorl of the shell is smooth, transitioning into extremely fine, sharp, closely spaced, and slightly arcuate longitudinal striae, which persist for the next two whorls.

These are covered by a thin, glossy, yellowish or flesh-tinted inner cuticle, which in turn is often overlain by a brown outer layer (ranging from blackish-brown to olivaceous-brown).

The interior of the basal and outer lips is typically rose-colored, though in some instances, it exhibits a bluish-white hue, adding a striking variation to the shell’s appearance.

Highly timid by nature, it resides buried beneath leaves and other decaying vegetation, making it well-adapted to its concealed lifestyle.

Amastra rubens rubinia - paralectotypes in the Smithsonian Institution