Gyraulus parvus
species of mollusc
Gyraulus parvus is a species of freshwater snail in the family Planorbidae, the ram's horn snails. It is known by the common name ash gyro. It is native to much of North America and the Caribbean, where it occurs in Canada, the United States (including Puerto Rico), Mexico, Hispaniola, Jamaica, and Cuba. It is also an introduced species in Eurasia, including Austria, the Czech Republic, France, Germany, and Israel.
This common snail occurs in many types of freshwater habitat, such as ponds and lakes. It consumes diatoms and other periphyton that it scrapes off of surfaces. It sometimes rests attached to water plants.
This snail has a thin, transparent, whitish-gray shell measuring 2.5 to 5 millimeters wide. It has 4 to 5 whorls. The upper side is concave and the lower side is flat.
This brief starts where responsible research should: with the source description of “Gyraulus parvus” as species of mollusc. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the science & nature register because the source frames it as species of mollusc. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Mar 5, 2026. The linked authority identifier is Q3077082. None of the 0 selected statements returned an explicit reference.
A general summary may omit uncertainty, sample limits or methodological disagreement that is explicit in the technical record. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Gyraulus parvus” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.