| Alinda stabilis | |
|---|---|
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| Shell of Alinda stabilis (holotype) | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Clausiliidae |
| Genus: | Alinda |
| Species: | A. stabilis |
| Binomial name | |
| Alinda stabilis (L. Pfeiffer, 1847) | |
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| Synonyms | |
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Alinda stabilis is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Clausiliidae, the door snails. [1]
The length of the shell attains 14 mm, its diameter 3.5 mm.
(Original description in Latin) The shell shows an arched slit, it is club-shaped and spindle-like. It is solid, tightly folded, translucent, and glossy with a horn-yellow hue. The spire tapers abruptly above, with a somewhat blunt tip. It comprises 11 convex whorls. The body whorl is swollen behind the aperture, rough in texture, and features a short crest at the base. The aperture is oval-pyriform, distinctly canaliculated at the base, with a thick palatal callus that narrows linearly. The upper lamella is relatively large, while the lower one is deep and subvertical, marked by a distinct crescent-shaped fold. The upper palatal fold is visible, and the columellar fold is slightly submerged. The peristome is continuous, free, and expanded, with sinuated upper and outer margins. [2]
This species occurs in Eastern Europe, mainly in Poland, Hungary and Romania. [3]
The aperture is an opening in certain kinds of mollusc shells: it is the main opening of the shell, where the head-foot part of the body of the animal emerges for locomotion, feeding, etc.
The gastropod shell is part of the body of a gastropod or snail, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage. Some gastropods appear shell-less (slugs) but may have a remnant within the mantle, or in some cases the shell is reduced such that the body cannot be retracted within it (semi-slug). Some snails also possess an operculum that seals the opening of the shell, known as the aperture, which provides further protection. The study of mollusc shells is known as conchology. The biological study of gastropods, and other molluscs in general, is malacology. Shell morphology terms vary by species group.
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