Alvania mamillata
Alvania mamillata is a species of small sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Description
The length of the shell attains 4.8 mm.The imperforate shell is strong and opaque. It is covered by rounded granules in longitudinal and spiral series. It has a white or light fulvous to chestnut color, unicolored or bifasciate. The lip is thick, labiate and sulcate within, white-varicose externally.