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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.
1.8-2 mm.
Found the Alps, in scattered relict localities across the north European lowlands, and into north and central Scandinavia. Distribution type: Suboceanic Boreal-montane (42).
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.
Wikipedia page for Vertigo geyeri
Anderson, R., (2016). Vertigo (Vertigo) geyeri Lindholm 1925. [In] MolluscIreland. http://www.habitas.org.uk/molluscireland/species.asp?ID=183 Accessed on 2022-05-28. |