Vertigo angustior

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.^[3]

Subspecies

• † Vertigo angustior intermedia Schlickum & Strauch, 1979

Narrow-mouthed whorl snail
Six shells of Vertigo angustior, scale bar in mm
Conservation status
Near Threatened  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Stylommatophora
Family:	Vertiginidae
Subfamily:	Vertigininae
Genus:	Vertigo
Species:	V. angustior
Binomial name
Vertigo angustior Jeffreys, 1830[2]
Synonyms
Vertigo (Vertilla) angustior Jeffreys, 1830 · alternate representation Vertigo hamata Held, 1837 (junior synonym) Vertigo nana Michaud, 1831 · unaccepted (junior synonym) Vertigo plicata A. Müller, 1838 (junior synonym)

Drawing: two views of a shell of Vertigo angustior

Fossil, Pleistocene

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:^[1]

Western Europe:

• Great Britain in List of endangered species in the British Isles (Ireland, United Kingdom). Endangered in Great Britain.^[4]
• Ireland Conservation status: Vulnerable (VU)^[5]
• Belgium
• France^[6]
• Liechtenstein
• Netherlands^[7]
• Switzerland

Central Europe:

• Austria
• Czech Republic - vulnerable (VU).^[8][9] 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.^[10]
• Germany
• Hungary
• Poland - endangered^[11]
• 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.