Alvania canariensis
Alvania canariensis is a species of minute sea snail, a marine gastropod or micromollusk in the family Rissoidae.
Description
The length of the shell varies between 1 mm and 3 mm.The imperforate, white shell is solid. It is covered with rounded nodules by the intersection of longitudinal and spiral ribs. The shell contains five whorls, slightly convex, with a rather deep suture. The outer lip is thickened and margined.
About 3 1/2 of the whorls are in the teleoconch, while the other 1 1/2 are in the protoconch.
The protoconch is white, with a black or brown spot at the apex. The teleoconch is usually brown.