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- ›Alzoniella
Alzoniella perrisii
Alzoniella perrisii is a species of very small aquatic snail, a spring snail, an operculate gastropod mollusc in the family Hydrobiidae.
Subspecies
From the article Alzoniella perrisii on Wikipedia (CC BY-SA), quoted section by section
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.
Where it lives
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
Drag the globe to turn it. Dots are where records exist, not a range map; darker means more records.
In the stacks
Searching the stacks…
Every page naming Alzoniella perrisii in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 93766.