Clausilia

Clausilia is a European genus of small, air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Clausiliidae, the door snails, all of which have a clausilium.

Snails in this genus have left-handed coiling in their shells, which are very elongate in shape.

Species
Species within the genus Clausilia include:
 * †Clausilia baudoni Michaud, 1862
 * Clausilia bidentata (Strøm, 1765)
 * Clausilia brembina Strobel, 1850
 * † Clausilia ceresolensis H. Nordsieck, 2013
 * Clausilia corynodes Held, 1836
 * Clausilia cruciata (Studer, 1820)
 * † Clausilia dehmi (H. Nordsieck, 2007)
 * Clausilia dubia Draparnaud, 1805
 * Clausilia gracilis C. Pfeiffer, 1821
 * Clausilia plicatula Draparaud
 * † Clausilia portisii Sacco, 1886
 * † Clausilia produbia H. Nordsieck, 1976
 * † Clausilia prostrobeli (H. Nordsieck, 2013)
 * Clausilia pumila Pfeiffer, 1828
 * † Clausilia rolfbrandti (Schlickum, 1969)
 * Clausilia rugicollis Rossmässler, 1836
 * Clausilia rugosa (Draparnaud, 1801)
 * † Clausilia stranzendorfensis H. Nordsieck, 1990
 * † Clausilia strauchiana H. Nordsieck, 1972
 * Clausilia strobeli Strobel, 1850
 * Clausilia ventricova
 * Clausilia whateliana Charpentier, 1850
 * Synonyms:
 * Clausilia (Alinda) H. Adams & A. Adams, 1855 : synonym of Alinda H. Adams & A. Adams, 1855