Gibbula umbilicalis

(da Costa, 1778)

Description (shell):
Shell similar to Gibbula cineraria but distinguished by a markedly cyrtoconoid shape (especially in older shells), a more angular last whorl (especially in younger shells), fewer (8-11) spiral ridges on base of last whorl and larger and more circular umbilicus (G. umbilicalis-drawing). Non-umbilicate forms have been recorded from south-east Cornwall and south-west Devon.

Up to 16 x 22 mm.

Cream or greenish background colour with broad stripes or bands of red or reddish-purple.

Body similar to Gibbula cineraria;; papillae fringing foot more pronounced.

Habitat similar to that of Gibbula cineraria, with which it is often found; More tolerant of emersion and therefore exhibits higher vertical zonation (MHWS - MLWS).

A more southern species than Gibbula cineraria , extending along Atlantic coast of France and west coast of Britain, Ireland, and northwards to Orkney. Absent from North Sea and British coasts in eastern basin of Channel (Distr. G. umbilicalis).