Clausiliidae · skląsteniniai

• door snails
• Schließmundschnecken
• skląsteniniai
• vārpstiņgliemežu dzimta
• świdrzykowate, świdrzyki

en.wikipedia.org/wiki/Clausiliidae

Clausiliidae, common name door snails, are a taxonomic family of small, very elongate, air-breathing land snails, terrestrial pulmonate gastropod mollusks.

All the species of Clausiliidae have an anatomical structure known as a clausilium, which enables the snail to close off the aperture of the shell with a sliding "door". Almost all the species of snails in the family of door snails are left-handed, which is an uncommon feature in gastropod shells in general.

These snails have shells which are extremely high-spired, with numerous whorls. The shells tend to be club-shaped, tapering at both ends to a rounded nub. The aperture usually has visible folds.

Kiautas laibas, verpstės pavidalo su 9-14 apsisukimų. Turi dangtelį vadinamą klausilija (lot. clausilium), kuriuo gali užsidaryti angą. Rūšių atskyrimui svarbūs požymiai yra angoje išsidėsčiusios raukšlės ir plokštelės, kurios kiekvienos rūšies yra skirtingos ir pastovios.‥