MolluscIreland - land and freshwater
  • Zenobiella subrufescens (J. S. Miller 1822) Brown Snail
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Zenobiella subrufescens
© Dr Roy Anderson
Zenobiella subrufescens
© Dr Roy Anderson

Map hosted by the National Biodiversity Data Centre, Waterford
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A very fragile, thin, depressed-globular shell with a low spire of 4-5 convex whorls with moderate sutures. Slightly shouldered at the periphery. Mouth elliptical, lacking a rib. Surface slightly glossy, thin and translucent, pale brown with fine irregular growth ridges. Widespread but local.

Key characteristics

  • A very thin, translucent brown shell
  • Depressed-globular spire with 4-5 convex whorls with moderate sutures
  • Slightly shouldered at the periphery
  • Animal variable in color from pale to dark grey to lmost black
  • Mouth elliptical lacking an internal rib or thickening

Size

8-10 mm.

World Distribution

Range centred upon the British Isles with a few localities on the western coasts of France. Distribution type: Oceanic temperate (71).

Irish Distribution

Widespread in an arc around the south, west and north of Ireland but rare or very local in the central plain and in eastern counties.

Ecology

  • An old woodland relict and confined to old woodland and scrub in glens, river valleys and scarps
  • It often occurs in association with the wood rush, Luzula
  • Appears adept at climbing trees and may often be swept or beaten off trees such as hazel and beech

Red List status

  • Vulnerable (VU).

Wikipedia link

Wikipedia page for Zenobiella subrufescens

 Anderson, R., (2016). Zenobiella subrufescens (J. S. Miller 1822). [In] MolluscIreland.
http://www.habitas.org.uk/molluscireland/species.asp?ID=194 Accessed on 2017-10-17.