Amastra transversalis is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.

Its coloration is blackish-red, covered by a tawny-gray epidermis that is interrupted by spots and bands, adding a pattern of visual interest.

The peristome is unexpanded, whitish on the interior or delicately edged with a rose tint, enhancing the shell's elegance.

These spirals vary greatly, ranging from deep, strong, and numerous to faint and sparse, with some shells displaying only trace vestiges that are difficult to discern.

The shell's ground color is a rich dark red-brown, partially obscured by intricate whitish tracery that forms a wonderfully varied pattern.