Vertigo angustior, the narrow-mouthed whorl snail, is a species of small land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Vertiginidae, the whorl snails.MolluscaBase eds. (2023). MolluscaBase. Vertigo angustior Jeffreys, 1830. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=426425 on 2023-02-07
Subspecies † Vertigo angustior intermedia Schlickum & Strauch, 1979
Description
The shell measures 1.6 to 2.0 mm (mean: 1.8 mm) in height and 0.9 1.05 mm (mean: 1 mm) in width. It is oblong ovoid with 4.5 to 5.35 whorls (mean 5). The aperture is sinistral and relatively small. The aperture edge is bent (indented) and slightly thickened and the aperture is slightly notched, the notch continuing outside as a spiral groove. The aperture bears 5-6 mainly short denticles: 2 parietal; 2 columellar; 1 palatal, the latter relatively long. The shell is brown to yellowish brown or horn coloured and has a fine growth striation.
Distribution IUCN red list - conservation dependent It is mentioned in Annex II of the European Union's Habitats Directive.
The species occurs in many countries in Europe and in Asia:
Western Europe: Great Britain in List of endangered species in the British Isles (Ireland, United Kingdom). Endangered in Great Britain.2000-2007. Action plan for Vertigo angustior . UK Biodiversity Action Plan. Joint Nature Conservation Committee. Ireland Conservation status: Vulnerable (VU)Byrne et al., 2009. http://www.npws.ie/en/media/NPWS/Publications/Redlists/RL2.pdf Belgium France Liechtenstein Netherlands Switzerland
Central Europe: Austria Czech Republic - vulnerable (VU). Its conservation status in the Czech Republic in 2004-2006 is bad (U2) in pannonian area and favourable (FV) in continental area in report for European Commission in accordance with Habitats Directive. Dušek J., Hošek M. & Kolářová J. (2007) Hodnotící zpráva o stavu z hlediska ochrany evropsky významných druhů a typů přírodních stanovišť v České republice za rok 2004-2006. - Ochrana přírody, 62(5): appendix 5:I-IV. Germany Hungary Poland - endangered Slovakia Slovenia
Northern Europe: Denmark, Finland, Norway, Sweden
Eastern Europe: Belarus, Estonia, Latvia, Lithuania, Russian Federation, Ukraine
Southern Europe: Italy, Romania
Asia: Armenia, Azerbaijan, Georgia.
References
Further reading Zofia Książkiewicz. January 2008. The narrow-mouthed whorl snail Vertigo angustior (Pulmonata: Gastropoda: Vertiginidae) - distribution and habitat disturbance in northwestern Poland. Provoost, S.; Bonte, D. (Ed.) (2004). Animated dunes: a view of biodiversity at the Flemish coast [Levende duinen: een overzicht van de biodiversiteit aan de Vlaamse kust]. Mededelingen van het Instituut voor Natuurbehoud, 22. Instituut voor Natuurbehoud: Brussel, Belgium. ISBN 90-403-0205-7. 416, ill., appendices pp. Tentacle 16. 5–6. The narrow-mouthed whorl snail (Vertigo angustior) (1014) Conservation Status Assessment Report. Sysoev, A. V. & Schileyko, A. A. (2009). Land snails and slugs of Russia and adjacent countries. Sofia/Moskva (Pensoft). 312 pp., 142 plates.
External links
Jeffreys, J. G. (1830). A synopsis of the testaceous pneumonobranchous Mollusca of Great Britain. Transactions of the Linnean Society of London. 16: 323-392 Müller, A. (1838). Ueber einige vaterländische Landschnecken. Archiv für Naturgeschichte. 4, 1: 209-211, pl. 4. Berlin Michaud, A.-L.-G. (1831). Complément de l'Histoire des mollusques terrestres et fluviatiles de la France, de J.P.R. Draparnaud. i-xvi, 1-116, Errata (1 p.), 1-12, pls 14-16. (December). Verdun: Lippmann
Vertigo angustior at Animalbase taxonomy, short description, distribution, biology, status (threats), images photo of Vertigo angustior https://web.archive.org/web/20081108053410/http://www.staff.amu.edu.pl/~polmal/smp/v115.htm MNHN, Paris: specimen