Drilliola megalacme

Drilliola megalacme is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.

Description
The species has a small, conical shell with its spire well raised and is fairly solid. Its colour is whitish-brown, with a white protoconch. It has six turreted whorls that are regularly increasing. Below the carina appear numerous longitudinal riblets, decussated by spiral carinations, giving the shell a somewhat prickly or nodulous appearance. The mouth is small, with a well-marked sinuation above.

Distribution
This species occurs in European waters along Portugal.