Vitrea pygmaea
Vitrea pygmaea is a species of gastropods belonging to the family Pristilomatidae. Description
The shell is very small: 0.7-0.8 mm x 1.4-2.1 mm. It is colourless, sometimes slightly pale greenish yellow. The shell contains 3.5-4 whorls. The body whorl is twice as wide as penultimate whorl, or even more. The umbilicus is very wide and perspectivical, all whorls well visible inside. This species can usually not be confounded with any other species. Distribution

The species inhabits Turkmenistan, Northern Iran, Iraq-Kurdistan, Caucasus region, Crimea, Turkey, Bulgaria, Croatia, Albania, Greece, possibly also Italy. The type locality is contained in Georgia. This species can be found in deciduous oak/hornbeam and pinetree forests with pH 4.5. It can survive continuous periods of drought. In Bulgaria it occurs between 300 and 1400 m.

References

 Pintér, L. (1972). Die Gattung Vitrea Fitzinger, 1833 in den Balkanländern (Gastropoda: Zonitidae). Annales Zoologici, 29 (8): 209-315. Warszawa 
 Riedel, A. (1995). Zonitidae sensu lato (Gastropoda, Stylommatophora) der Türkei. Übersicht der Arten. Fragmenta Faunistica, 38 (1): 1-86. Warszawa
 Sysoev, A. V. & Schileyko, A. A. (2009). Land snails and slugs of Russia and adjacent countries. Sofia/Moskva (Pensoft). 312 pp., 142 plates
 Bank, R. A.; Neubert, E. (2017). Checklist of the land and freshwater Gastropoda of Europe. Last update: July 16th, 2017

External links
 Boettger, O. (1880). Kaukasische Mollusken gesammelt von Herrn Hans Leder, z. Z. in Tiflis. Jahrbücher der Deutschen Malakozoologischen Gesellschaft. 7 (2): 109-150, pl. 4. Frankfurt am Main

Pristilomatidae