Flat top shell (Steromphala umbilicalis)
|Researched by||Paolo Pizzolla||Refereed by||Admin|
|Authority||(da Costa, 1778)|
|Other common names||-||Synonyms||Gibbula umbilicaris (Linnaeus, 1758)|
Recorded distribution in Britain and IrelandGibbula umbilicalis is found on western shores of the UK as far north as Scotland and on suitable shores in Ireland. It is absent from the North Sea coast and eastern English Channel.
HabitatFound from the upper shore into the sublittoral on sheltered rocky shores and is tolerant of emersion and brackish waters.
- Small topshell 1.6 cm high, 2.2 cm across.
- Large round umbilicus.
- Dull greenish grey in colour with reddish-purple broad diagonal stripes.
Additional informationA form without the umbilicus has been recorded in south-east Cornwall and south-west Devon.
- none -
Fish, J.D. & Fish, S., 1996. A student's guide to the seashore. Cambridge: Cambridge University Press.
Hayward, P., Nelson-Smith, T. & Shields, C. 1996. Collins pocket guide. Sea shore of Britain and northern Europe. London: HarperCollins.
Hayward, P.J. & Ryland, J.S. (ed.) 1995b. Handbook of the marine fauna of North-West Europe. Oxford: Oxford University Press.
Howson, C.M. & Picton, B.E., 1997. The species directory of the marine fauna and flora of the British Isles and surrounding seas. Belfast: Ulster Museum. [Ulster Museum publication, no. 276.]
JNCC (Joint Nature Conservation Committee), 1999. Marine Environment Resource Mapping And Information Database (MERMAID): Marine Nature Conservation Review Survey Database. [on-line] http://www.jncc.gov.uk/mermaid
Picton, B.E. & Costello, M.J., 1998. BioMar biotope viewer: a guide to marine habitats, fauna and flora of Britain and Ireland. [CD-ROM] Environmental Sciences Unit, Trinity College, Dublin.
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Last Updated: 17/04/2008