(Linné, 1767)
Description:
Shell resembles that of Trophon truncatus but has fewer, taller costae raised into conspicuous spurs at the edge of the subsutural flat area, and a longer and more obliquely set siphonal canal. The number and shape of the lamellae is variable. The larval whorl is tall. No spiral sculpture on the teleoconch.
Size:
Up to 15-40 mm.
Colour:
Variable from white to dark brown.
Animal:
Distal third of cephalic tentacles narrow, with eyes set on lateral bulges at junction with broader basal portion. Foot with double-edged anterior margin and slight anterio-lateral horns; operculum small, oval.
Habitat:
All types of bottoms between 1 and 1100 m deep.
Distribution:
A northern Atlantic species. (Distr. T. clathratus).