Vertigo geyeri
{{Short description|Species of gastropod}}
{{Speciesbox
| image = Vertigo geyeri-2009-27-09.jpg
| image_caption = Apertural view of a shell of Vertigo geyeri
| image2 = Vertigo geyeri.jpg
| image2_caption = Six shells of Vertigo geyeri, scale bar in mm
| status = LC
| status_system = IUCN3.1
| taxon = Vertigo geyeri
| authority = Lindholm, 1925{{in lang|de}} Lindholm W. A. 1925. Studien an palaearktischen Vertigo-Arten. Archiv für Molluskenkunde 57 (5/6): 241-251.
| synonyms =
- Vertigo geyerii Lindholm, 1925 [orth. error]
- Vertigo (Glacivertigo) geyeri Lindholm, 1925 (unaccepted subgeneric classification)
- Vertigo (Vertigo) geyeri Lindholm, 1925 · alternate representation
- Vertigo genesii var. geyeri Lindholm, 1925
|display_parents= 3
}}
Vertigo geyeri is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusc or micromollusc in the family Vertiginidae, the whorl snails.MolluscaBase eds. (2023). MolluscaBase. Vertigo geyeri Lindholm, 1925. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1050662 on 2023-02-08
The specific name geyeri is in honor of German zoologist David Geyer (1855–1932).
Description
The egg-shaped-oval shell measures just {{convert|1.7|to|1.9|mm|in|2|abbr=on}}. in length and {{convert|1.2|mm|in|abbr=on|2}} in width. There are up to five whorls with deep seams. The aperture has four small protrusions (called "teeth") (on parietal one columellar and two palatal), it can also have fewer teeth. The colour of the shell is reddish-brown and the surface is shiny. The shell has regular growth striations and is almost smooth.{{cite web |url=http://www.animalbase.uni-goettingen.de/zooweb/servlet/AnimalBase/home/species?id=1687 |title=Vertigo geyeri Lindholm, 1925 |publisher=AnimalBase |access-date=15 March 2020}}{{cite web |url=http://www.staff.amu.edu.pl/%7Epolmal/smp/v103.htm |archive-url=https://web.archive.org/web/20050306175638/http://www.staff.amu.edu.pl/%7Epolmal/smp/v103.htm |url-status=dead |archive-date=6 March 2005 |title=Vertigo (Vertigo) geyeri LINDHOLM, 1925 |publisher=Uniwersytet im. Adama Mickiewicza w Poznaniu |access-date=15 March 2020}}
Habitat
This species lives in constantly wet, calcareous flush-fens that are fed by tufa-depositing springs. In the British Isles (Ireland and United Kingdom) it often lives in association with black bog-rush Schoenus nigricans and yellow sedge Carex viridula, in dense short grasses and sedges with little Sphagnum moss.{{cite web |url=https://sac.jncc.gov.uk/species/S1013/ |title=Geyer's whorl snail Vertigo geyeri |publisher=JNCC |access-date=15 March 2020}}
Distribution and conservation status
File:Vertigo-geyeri Presence in European countries.png
Vertigo geyeri is a boreo-alpine species, probably endemic to Europe. It occurs in the boreal, alpine, continental and Atlantic zones with a range extending from Ireland to Russia. Its populations are scattered and local extinctions of isolated populations can occur. It is mentioned in Annex II of the European Union's Habitats Directive.
In the British Isles it is included in the List of United Kingdom Biodiversity Action Plan species, Great Britain (endangered in Great Britain).2001–2007. [http://www.ukbap.org.uk/UKPlans.aspx?ID=628 Action plan for Vertigo geyeri]. UK Biodiversity Action Plan, Joint Nature Conservation Committee It occurs in such scattered locations as on Beinn a' Ghlò in Eastern Scotland, in North Yorkshire, in Cumbria and in Corsydd Môn in Anglesey, where there is a large, low-altitude population in a calcareous fen.
It is considered critically endangered in the Czech Republic,{{cite web|url=http://stanoviste.natura2000.cz/index.php?page=zivocich_detail&ZivocichID=133 |title=Evropsky významné lokality v České republice |year=2003|language=cs}}{{cite web|url=http://mollusca.sav.sk/malacology/redlist.htm |title=Red List of the molluscs (Mollusca) of the Czech Republic |date=2006-07-14}} Its conservation status in Czech Republic in 2004-2006 is bad (U2) in report for European Commission in accordance with Habitats Directive.{{in lang|cs}} 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. and it occurs in Denmark, Finland, France, Germany, Latvia, Lithuania, Norway, Poland, Slovakia, Ukraine,Balashov I. & Gural-Sverlova N. 2012. An annotated checklist of the terrestrial molluscs of Ukraine. Journal of Conchology. 41 (1): 91-109. Sweden and Switzerland.
{{Clear}}
References
{{Commons category|position=left}}
{{Reflist}}
- Bank, R. A.; Neubert, E. (2017). Checklist of the land and freshwater Gastropoda of Europe. Last update: July 16, 2017.
{{Taxonbar|from=Q1810878}}
Category:Gastropods described in 1925