Alvania aspera

Alvania aspera 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 3.7 mm.

The shell resembles Alvania lineata, but the decussations are deeper, giving the nodules a rough appearance.

Distribution
This species occurs in the Mediterranean Sea off Tunisia and Greece.