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

(Kanmacher, 1798)

Description (shell):
Shell elongate, conical, glossy; with six tumid, semitransparent whorls; apical whorls smooth or finely reticulate, contrasting with strong flexuous costae and spiral striae on teleoconch. Spiral striae accentuated on base of shell, forming two prominent spiral keels; aperture small, oval, with thickened peristome and labial costa (varix); a deep umbilical groove but no umbilicus (M. crassa-drawing).

Size:
Up to 3.5 x 2 mm.

Colour:
White.

Animal:
Body of typical rissoid pattern, mantle edge smooth, with short pallial tentacle on right and slightly more prominent one on left. Metapodial tentacle narrow, extends to edge of foot; an additional, smaller projection on each metapodial lobe.

Habitat:
Fairly common among weeds and under stones at LWM; more common sublittorally, to 50 m, on sandy bottoms.

Distribution:
From Mediterranean to Norway; absent from continental coasts of North Sea (Distr. M. crassa).

Manzonia crassa