Vertigo pygmaea

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. 

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. 

This snail lives under hedges. 

Distribution
This species occurs in Europe in the following countries and islands:
 Czech Republic
 Netherlands
 Poland
 Slovakia
 Ukraine
 Great Britain
 Ireland
 Latvia
 and others

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. 

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

Category:Vertigo (gastropod)
Category:Gastropods described in 1801