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

Gray J.E., 1839

Description (shell):
Shell solid, with well-developed spire of five or six moderately tumid whorls; last whorl comprises >75 % of shell height. Sculpture of irregular prosocline growth lines and strap-like spiral striae; a shallow central groove on striae of last whorl. Outer lip meets last whorl almost at right angles, margin slightly crenulate, internally thickening rapidly towards throat; inner lip reflected over columella region, extending to meet outer lip adapically as a glaze on last whorl. No umbilicus or umbilical groove (L. nigrolineata-drawing).

Size:
Up to 30 x 27 mm, commonly 20 x 18 mm.

Colour:
Whitish, yellow or deep orange-red, often with dark brown pigmentation in grooves between spiral striae; peristome white, throat brown.

Animal:
Body similar to Littorina littorea , penis with very short tip, close to which are 12 large glands. Female oviparous, ovipositor conspicuous below right eye. A pale streak extends diagonally from right to left across floor of mantle and through the penis/ovipositor.

Habitat:
Among weeds and stones; higher on exposed shores (barnacle/Fucus spiralis zone), extending down to Ascophyllum belt in sheltered areas.

Distribution:
Distribution imperfectly known (Distr. L. nigrolineata).

Littorina nigrolineata