Vertigo genesii
| Vertigo genesii | |
|---|---|
 | |
| Drawing of the shell of Vertigo genesii. | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Superfamily: | Pupilloidea |
| Family: | Vertiginidae |
| Subfamily: | Vertigininae |
| Tribe: | Vertiginini |
| Genus: | Vertigo |
| Subgenus: | Vertigo |
| Species: | V. genesii |
| Binomial name | |
| Vertigo genesii (Gredler, 1856)[2] | |
| Synonyms | |
|
Pupa Genesii Gredler, 1856[2] | |
Vertigo genesii, common name the round-mouthed whorl snail, is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusc or micromollusc in the family Vertiginidae, the whorl snails.
Shell description
The shell is very small, ovate, obtuse, indistinctly, spaced striate, glossy purplish brown. The shell has 4½ whorls, that are rather convex, high, rapidly increasing, joined by a somewhat impressed suture, the penult large, almost ventricose. Umbilical opening is moderate.[3]
The aperture is semirotund, nearly quadratic, without any folds. Peristome is scarcely expanded, thickened liplike, bordered with bluish black, the margins are connected by a very weak callus, the right margin is arched at the insertion.[3]
The width of the adult shell is 1.03–1.20 mm, the height is 1.63–2.00 mm.[4]
Anatomy
The animal body color is raven-black. The tentacles are short, contracted in the middle.[3]
Distribution and conservation status
- IUCN red list - conservation dependent
- It is mentioned in Annex II of the European Union's Habitats Directive.
This species occurs in:
- British Isles (in the United Kingdom only): Great Britain. It is endangered in Great Britain[5] and it is listed in List of endangered species in the British Isles.
- Continental Europe: Finland, Germany, Norway, Poland, Romania, Russian Federation, Sweden, and Switzerland.
References
This article incorporates public domain text from reference.[3]
- ↑ Mollusc Specialist Group (1996). "Vertigo geyeri". 2006 IUCN Red List of Threatened Species. IUCN. Retrieved 2007-04-30.
- 1 2 (German) Gredler V. 1856. Tirol's Land- und Süsswasser-Conchylien. I. Die Landconchylien. Verhandlungen des Zoologisch-Botanischen Vereins in Wien (Abhandlungen) 6: 25-162, Table 2, figure 3.
- 1 2 3 4 Pilsbry H. A. & Cooke C. M. 1918-1920. Manual of Conchology. Second series: Pulmonata. Volume 25. Pupillidae (Gastrocoptinae, Vertigininae). Philadelphia. page 204.
- ↑ Vertigo (Vertigo) genesii (GREDLER, 1856). In: The Vertiginidae of Poland, accessed 2 July 2009.
- ↑ 2001-2007. Action plan for Vertigo genesii. UK Biodiversity Action Plan, Joint Nature Conservation Committee.