Alzoniella perrisii

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Alzoniella perrisii
Alzoniella perrisii 001.jpg
Shell of Alzoniella perrisii (holotype)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Family: Hydrobiidae
Genus: Alzoniella
Species:
A. perrisii
Binomial name
Alzoniella perrisii
(Dupuy, 1851)
Synonyms
  • Alzoniella (Alzoniella) perrisii(Dupuy, 1851)
  • Hydrobia perrisiiDupuy, 1851 (original combination)

Alzoniella perrisii is a species of very small aquatic snail, a spring snail, an operculate gastropod mollusc in the family Hydrobiidae. [1]

Contents

Subspecies

Description

(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

This species occurs in France.

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References

  1. ↑ Alzoniella perrisii (Dupuy, 1851) . 26 September 2024. Retrieved through: World Register of Marine Species .
  2. ↑ 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.PD-icon.svg This article incorporates text from this source, which is in the public domain .


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