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
Links to other Web sites

(da Costa, 1778)

Description (shell):
Shell elongate, conical, up to 16 (usually 10-12) moderately tumid whorls; apex pointed. Sculpture of strong costae and spiral striae, interacting to give oval tubercles: four rows on lower whorls, three on upper whorls; no tubercles on lowest spiral ridge of each whorl, or on basal ridges of last whorl. One costa, the varix, often more prominent than rest; varix of last whorl close to aperture. Aperture oval, drawn out to a short sinus basally; outer lip crenulate, without anal sinus. Inner lip reflected over columella region and base of last whorl; no umbilicus (B. reticulatum-drawing).

Up to 15 x 6 mm, commonly half this size.

Buff to light chestnut-brown; tubercles, varices, and columella lighter.

Snout long, bifid; cephalic tentacles long, slender with eyes on prominent bulge at base. Mantle edge broadly lobed; foot long, narrow, with doubled-edged anterior margin; large opercular lobe projects posteriorly from below oval operculum.

On soft substrata, associated with Zostera and other weeds; from LWST to 250 m.

Locally abundant. Widely distributed from Canaries to Lofoten Isles; absent from continental shores of the southern North Sea and east Channel (Distr. B. reticulatum).

Bittium reticulatum