Home|Search|Identify|Taxonomic tree|Quiz|About this site|Feedback
Developed by ETI BioInformatics
Characteristics, distribution and ecology
Taxonomische classification
Synonyms and common names
Literature references
Images, audio and video
Distribution map
Links to other Web sites

(Mohr, 1786)

Description (shell):
Shell similar to Colus gracilis , differing only in minor detail. Protoconch bulbous, often of greater diameter than next whorl and set more obliquely on spire; whorls more tumid. Spiral striae often more pronounced, less than 40 on last whorl; triangular area of last whorl lacking periostracum relatively smaller than in Colus gracilis . Aperture with long narrow siphonal canal; (about 25 % of shell height), not markedly inclined to left; outer lip arises at level of spiral stria 10-12 on last whorl (C. islandicus-drawing).

Size:
Up to 150 x 50 mm.

Colour:
White, with light horn-coloured periostracum.

Animal:
Indistinguishable from that of Colus gracilis.

Habitat:
On soft substrata, from 10-3000 m.

Distribution:
A northern species extending south to Shetland and the north coast of Scotland (Distr. C. islandicus); subfossil shells may be encountered in more southern waters.

Colus islandicus