MolluscIreland - land and freshwater
  • Vertigo (Vertigo) substriata (Jeffreys, 1833) Striated whorl snail

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A short, slightly barrel-shaped, dextral shell with the penultimate whorl slightly but noticeably broader than the last (body) whorl. Colour a distinctive yellow to pale brown with distinctive regular striations on the upper whorls. Aperture with 5-6 fine denticles: 2 parietal; 1-2 columellar; 2 palatal. No other species has the combination of pale colour, broad penultimate whorl and regular striations. Widespread.

Key characteristics

  • A very small, dextral, barrel-shaped shell with the penultimate whorl noticeably broader than the body whorl
  • Colour pale, a distinctive yellow-brown with strong radial striations on the upper whorls
  • Aperture with 5-6 slender teeth: 2 parietal; 1-2 columellar; 2 palatal
  • Lip thin, barely reflected, but strengthened by an internal callus which connects the teeth
  • Animal pale

Size

1.7-1.9 mm.

World Distribution

Widespread in central and northern Europe to beyond the Arctic Circle. Distribution type: European Boreo-temperate (53).

Irish Distribution

Widespread, particularly in the west and north but probably under-recorded.

Ecology

  • Recorded principally from wet unimproved pasture in areas with underlying calcareous bedrock
  • Also found in wet scrub, particularly in the west
  • At altitude or on deep peat it trends to be confined to the margins of calcareous flushes
  • Marsh and field drainage and the general intensification of agriculture appear to be inimical

Red List status

  • Near threatened (nt).

Wikipedia link

Wikipedia page for Vertigo substriata

 Anderson, R., (2016). Vertigo (Vertigo) substriata (Jeffreys, 1833). [In] MolluscIreland.
http://www.habitas.org.uk/molluscireland/species.asp?ID=187 Accessed on 2017-10-18.