Alzoniella perrisii
| Alzoniella perrisii | |
|---|---|
| |
| Shell of Alzoniella perrisii (holotype) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Hydrobiidae |
| Genus: | Alzoniella |
| Species: | A. perrisii
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| Binomial name | |
| Alzoniella perrisii (Dupuy, 1851)
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| Synonyms | |
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Alzoniella perrisii is a species of very small aquatic snail, a spring snail, an operculate gastropod mollusc in the family Hydrobiidae.[1]
- Subspecies
- Alzoniella perrisii irubensis Boeters, 2000
- Alzoniella perrisii perrisii (Dupuy, 1851)
Description
[edit](Original description in Latin) The very small shell is imperforate, with a blunt protoconch and a slightly elongated cylindrical shape, remarkably smooth. The aperture is somewhat ovate-pyriform, with a slightly obtuse angle at the top, and features a continuous, straight, simple, and sharp peristome. The shell contains 4 whorls, gradually increasing in size, slightly convex, and separated by a faintly visible suture. The body whorl accounts for at least half of the shell's total length.
The shell is thin, horn-colored, translucent, and glossy, though often obscured by a dark coating of mud.
The operculum is very thin, translucent, and horn-yellow, and is slightly recessed into the body whorl.[2]
Distribution
[edit]This species occurs in France.
References
[edit]- ^ Alzoniella perrisii (Dupuy, 1851). 26 September 2024. Retrieved through: World Register of Marine Species.
- ^ Dupuy, D. (1847–1851). Histoire naturelle des mollusques terrestres et d'eau douce qui vivent en France. Paris/Auch: Victor Masson / Brun. p. 563. Retrieved 26 September 2024.
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