Petaloconchus glomeratus

Petaloconchus glomeratus is a species of sea snail, a marine gastropod mollusk in the family Vermetidae, the worm snails or worm shells.

Description
Shells of Petaloconchus glomeratus can reach a size of 2 - 7 mm. They are elongated, tubular, and extremely irregular. These "worm shells" usually grow cemented in colonies onto a hard substrate.

Distribution
This species is present in the Mediterranean Sea - Eastern Basin and in North Atlantic Ocean.