Alvania scabra

Alvania scabra is a species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.

Description
The length of the shell varies between 1.5 mm and 3 mm.

The shell is longitudinally plicate, obsolete below, spirally lirate, forming mamillary tubercles. It contains 6 slightly convex whorls. The shell is white, maculated with chestnut. The outer lip is sulcate within, varicose externally.

Distribution
This species occurs in the Mediterranean Sea (Spain, Algeria, Italy, Greece); in the Atlantic Ocean off Madeira.