(Bruguière, 1792)
Description (shell):
Glossy; cylindrical, with longitudinal striations.
Size:
Shell up to 5 mm, total length up to 7 mm.
Colour:
Translucent white or yellowish.
Animal:
Body white. Cephalic shield indented anteriorly at midline, cephalic tentacles pointed. Foot elongate, with rounded corners, indented anteriorly.
Habitat:
Burrows in sand, muddy sand, and mud; lower intertidal to about 50 m. Feeds on Hydrobia ulvae and perhaps foraminiferans and small lamellibranchs.
Distribution:
Common in the North Sea (Distr. R. truncatula).