Clausilia bidentata, the two-toothed door snail, is a species of door snails, terrestrial pulmonate gastropod mollusks in the genus Clausilia belonging to the family Clausiliidae, all of which have a clausilium.
Subspecies Clausilia bidentata abietina Dupuy, 1849 Clausilia bidentata bidentata (Ström, 1765) Clausilia bidentata crenulata Risso, 1826 Clausilia bidentata moniziana Lowe, 1852
Distribution This species is present in much of western Europe, including:
Czech Republic - in Bohemia only Great Britain Ireland
Habitat This species is commonly found under bark of trees or in crevices of rocks. The snails are often encountered when they are most active, at night during wet weather, at which time they often climb up trees and feed on lichens.
Ecology
It selectively grazes on calcareous-rock lichens, particularly the crustose lichen species Verrucaria nigrescens.
Description The shell of this snail is a small and cylindrical snail, very high-spired and narrow. The shell length reaches . The shell is dark brown with noticeable spiral ribs, slight longitudinal grooves, and a horny operculum.
Gallery
References
Anderson, R. 2005, An Annotated List of the Non-Marine Mollusca of Britain and Ireland, Journal of Conchology, London, 38: 607-638 Kerney, M, 1999, Atlas of the Land and Freshwater Molluscs of Britain and Ireland, Harley Books, Colchester
External links
Clausilia bidentata at Animalbase taxonomy, short description, distribution, biology, status (threats), images Fauna Europaea Biolib Habitas Naturespot