Clausilia dubia

Clausilia dubia is a species of small, very elongate, left-handed air-breathing land snail, a sinistral terrestrial pulmonate gastropod mollusk in the family Clausiliidae, the door snails, all of which have a clausilium.

Subspecies

 * Clausilia dubia alpicola Clessin, 1878
 * Clausilia dubia bucculenta Klemm, 1960
 * Clausilia dubia carpathica Brancsik, 1888
 * Clausilia dubia dubia Draparnaud, 1805
 * Clausilia dubia dydima F. J. Schmidt, 1847
 * Clausilia dubia floningiana Westerlund, 1890
 * Clausilia dubia geretica Bourguignat, 1877
 * Clausilia dubia gracilior Clessin, 1887
 * Clausilia dubia gratiosa Sajó, 1968
 * Clausilia dubia grimmeri L. Pfeiffer, 1848
 * Clausilia dubia huettneri Klemm, 1960
 * Clausilia dubia ingenua Hudec & Brabenec, 1963
 * Clausilia dubia kaeufeli Klemm, 1960
 * Clausilia dubia otvinensis H. von Gallenstein, 1895
 * Clausilia dubia runensis Tschapeck, 1883
 * Clausilia dubia schlechtii A. Schmidt, 1856
 * Clausilia dubia speciosa A. Schmidt, 1856
 * Clausilia dubia suttoni Westerlund, 1881
 * Clausilia dubia tettelbachiana Rossmässler, 1838
 * Clausilia dubia vindobonensis A. Schmidt, 1856

Distribution
The species is widespread in Europe, living in countries and islands including (among others):


 * Austria
 * Czech Republic
 * Great Britain, the north of England
 * Slovakia
 * Ukraine

Description
All the species of snails in the family of door snails are left-handed, which is an uncommon feature in gastropods in general. These snails have shells which are extremely high-spired, with numerous whorls.

Clausilia dubia is a relatively large species for this family, reaching 16 mm in height.

The weight of the adult live snail is about 123 mg.