Perpolita hammonis is a small land snail. It is also known as Nesovitrea hammonis. It lives in Palearctic. It is quite common species, that lives in forests as well as in open habitats. Although it belongs to Oxychilidae, it can be easily identified, because it has regular radial ribs on the shell that are clearly visible under any magnifying glass.
It prefer from moist to wet humidity, so I keep them rather in wet environment.
Falkner G., Obrdlík P., Castella E. & Speight M. C. D. (2001). Shelled Gastropoda of Western Europe. München: Friedrich-Held-Gesellschaft, 267 pp.
(in Slovak) Lisický M. J. (1991). Mollusca Slovenska [The Slovak molluscs]. VEDA vydavateľstvo Slovenskej akadémie vied, Bratislava, 344 pp.