MolluscIreland - land and freshwater
  • Leiostyla (Leiostyla) anglica (A. Férussac 1821) English chrysalis snail
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Leiostyla (Leiostyla) anglica
© Dr Roy Anderson
Leiostyla (Leiostyla) anglica
© Dr Roy Anderson

Map hosted by the National Biodiversity Data Centre, Waterford
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A handsome chestnut snail with four strong teeth in the aperture. Shell broad, slightly barrel-shaped, of 6-7 whorls. The lip is thickened and reflected outwards and has a conspicuous central indentation. Whorls flattened, not convex.

Key characteristics

  • A small barrel-shaped shell with acuminate spire i.e. rapidly narrowing to apex
  • Colour a rich red-brown when fresh but often oxidised to a dull whitish - a pure white form occurs locally in eastern counties
  • Aperture with a conspicuous central indentation and lip thickened and reflected outwards
  • Four strong teeth present - 2 parietal, 1 columellar, 1 palatal - entering the aperture in a complex curved trajectory

Size

3.5-3.8 mm.

World Distribution

Confined to extreme western seaboards in Europe from the British Isles to Portugal and into north Africa. Distribution type: Oceanic Southern-temperate (81).

Irish Distribution

Commoner in Ireland than elsewhere in Europe (Kerney, 1999). Widespread and locally common, particularly in the north and west.

Ecology

  • Common in wet, shaded habitats on neutral to base-rich soils
  • Usually found attached to twigs or larger branches in leaf litter on the ground - not a species which climbs on trees or walls
  • Towards the west coast recorded from more open habitats such as acid coastal heath and rough pasture

Red List status

  • Vulnerable (VU).

Wikipedia link

Wikipedia page for Leiostyla anglica

 Anderson, R., (2016). Leiostyla (Leiostyla) anglica (A. Férussac 1821). [In] MolluscIreland.
http://www.habitas.org.uk/molluscireland/species.asp?ID=102 Accessed on 2017-12-17.