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Alzoniella perrisii

From Wikipedia, the free encyclopedia

Alzoniella perrisii
Shell of Alzoniella perrisii (holotype)
Scientific classification Edit this classification
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 perrisii Dupuy, 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]

Subspecies
  • Alzoniella perrisii irubensis Boeters, 2000
  • Alzoniella perrisii perrisii (Dupuy, 1851)

Description

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(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

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This species occurs in France.

References

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  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. Public Domain This article incorporates text from this source, which is in the public domain.