Alvania purpurea
species of mollusc
Alvania purpurea is a species of small sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Distribution
This species occurs in the Pacific Ocean off Monterey, California.
Description
(Original description) The small shell consists of four rounded whorls that are rather pointed.
The sculpture consists of six or seven revolving ribs. On the body whorl, only two
appear on the second whorl. The apical whorl is smooth. These ribs are crossed by about twenty longitudinal riblets, which do not pass the second revolving rib on the body whorl. On the antepenultimate whorl they reach from suture to suture, and are conspicuously angulated at their intersections with the two evolving ribs. The suture is deep. The aperture is rounded and is interrupted by the body whorl.
“Alvania purpurea” enters the record as species of mollusc. Crown Archives preserves that source wording while asking what Alvania, purpurea and species can confirm, complicate or overturn.
Why this record matters
“Alvania purpurea” is worth following because a concise public description often conceals a longer documentary argument. Here, Alvania, purpurea and species provides the most credible route into that argument.
Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated May 20, 2026. The linked authority identifier is Q6777748. None of the 0 selected statements returned an explicit reference.
Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. 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.
How to read it
Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.
- Current terminology
- Classification context
- Finding cited technical literature
Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.
Three-step research path
- Establish the record: confirm the title “Alvania purpurea”, its source revision and the description used here.
- Expand the search: follow Alvania purpurea primary sources, Alvania purpurea archive and Alvania research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Alvania purpurea”?
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- Has classification or technical consensus changed since the cited source?
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This entry incorporates text from “Alvania purpurea” 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.