Vertigo pygmaea

Vertigo pygmaea
	Apertural view of a shell of Vertigo pygmaea
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Superfamily:	Pupilloidea
Family:	Vertiginidae
Subfamily:	Vertigininae
Tribe:	Vertiginini
Genus:	Vertigo
Subgenus:	Vertigo
Species:	V. pygmaea
Binomial name
	Vertigo pygmaea; (Draparnaud, 1801)
Synonyms
	Helix (Isthmia) cylindrica Gray, 1821 (junior synonym); Pupa (Vertigo) pygmaea (Draparnaud, 1801) (superseded combination); Pupa pygmæa Draparnaud, 1801; Vertigo (Vertigo) pygmaea (Draparnaud, 1801)· accepted, alternate representation;

Vertigo pygmaea, common name the "crested vertigo", is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Vertiginidae, the whorl snails.

Shell description

The shell is extremely small, oval-cylindric and obtuse at the summit, of a more or less deep brown, smooth and dull. The spire consists of five whorls.^[2]

The aperture is scarcely longer than wide, and nearly round, furnished with four teeth, of which the superior is acute, two deeply placed inferior, and finally one on the columellar margin. A fifth tooth is often found in the base of the aperture. The lateral margin is slightly angular in the middle. Peristome is reflected below. The umbilical crevice quite pronounced.^[2]

This snail lives under hedges.^[2]

Distribution

This species occurs in Europe in the following countries and islands:

And in America, in various places including:

Michigan - special concern, see List of threatened fauna of Michigan

References

This article incorporates public domain text from reference.^[2]

^ Draparnaud J. P. R. 1801. Tableau des mollusques terrestres et fluviatiles de la France. pp. [1-2], 1-116. Montpellier, Paris. (Renaud; Bossange, Masson & Besson).
^ ^a ^b ^c ^d Pilsbry H. A. & Cooke C. M. 1918-1920. Manual of Conchology. Second series: Pulmonata. Volume 25. Pupillidae (Gastrocoptinae, Vertigininae). Philadelphia. page 174.
^ Balashov I. & Gural-Sverlova N. 2012. An annotated checklist of the terrestrial molluscs of Ukraine. Journal of Conchology. 41 (1): 91-109.

External links

Vertigo pygmaea at Animalbase taxonomy, short description, distribution, biology, status (threats), images
images representing Vertigo pygmaea at Encyclopedia of Life
winter survival

[1] Draparnaud J. P. R. 1801. Tableau des mollusques terrestres et fluviatiles de la France. pp. [1-2], 1-116. Montpellier, Paris. (Renaud; Bossange, Masson & Besson).

[Pilsbry-2] Pilsbry H. A. & Cooke C. M. 1918-1920. Manual of Conchology. Second series: Pulmonata. Volume 25. Pupillidae (Gastrocoptinae, Vertigininae). Philadelphia. page 174.

[Balashov-3] Balashov I. & Gural-Sverlova N. 2012. An annotated checklist of the terrestrial molluscs of Ukraine. Journal of Conchology. 41 (1): 91-109.

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