MolluscIreland - land and freshwater
  • Vertigo (Vertigo) geyeri Lindholm 1925 Whorl Snail
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Vertigo (Vertigo) geyeri
© Dr Roy Anderson
Vertigo (Vertigo) geyeri
© Dr Roy Anderson
Vertigo (Vertigo) geyeri
© Dr Roy Anderson

Map hosted by the National Biodiversity Data Centre, Waterford
To view the species profile on Biodiversity Maps and access the live map, please click on the map.


Shell dextral. Slightly barrel-shaped with strongly tumid whorls. Aperture rounded, with 4 denticles: 1 parietal; 1 columellar; 2 palatal. Shell glossy, nearly smooth (fine growth lines) and pale red-brown but appearing dark because of the very dark animal. Lip with no thickening and lacking a pale callus around the denticles.

Key characteristics

  • A tiny dextral, barrel-shaped, red-brown shell
  • Aperture rounded, without indent
  • Four teeth present: 1 parietal; 1 columellar; 2 palatal
  • Lip with no thickening and lacking a pale callus around the denticles
  • Shell glossy, appearing smooth, but dark because of the dark animal inside


1.8-2 mm.

World Distribution

Found the Alps, in scattered relict localities across the north European lowlands, and into north and central Scandinavia. Distribution type: Suboceanic Boreal-montane (42).

GBIF distribution map [open in new tab]

Irish Distribution

This species is known historically from scattered sites across central and west Ireland (Cos. Offaly, Mayo and Sligo) (Phillips, 1935; Norris & Pickrell, 1972; Cawley, 1996a). In more recent times its range has been extended by field work to Cos Donegal, Leitrim, Fermanagh and Londonderry which suggests a wide distribution in base-rich flushes in the north and west.


  • The principal habitat appears to be base-rich flushes in ombrogenous bog, with communities isolated from each other by the spontaneous growth of bog following the end of the Boreal period of the Irish Postglacial
  • It requires short, mossy vegetation and an alkaline pH to thrive
  • Sward height may be critically important

Red List status

  • Vulnerable (VU).

Wikipedia link

Wikipedia page for Vertigo geyeri

 Anderson, R., (2016). Vertigo (Vertigo) geyeri Lindholm 1925. [In] MolluscIreland. Accessed on 2024-06-24.