Amastra affinis
species of gastropod
Amastra affinis is a species of land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Subspecies
Amastra affinis kaupakaluana Hyatt & Pilsbry, 1911 (taxon inquirendum)
Amastra affinis pupoidea (Newcomb, 1854) (taxon inquirendum)
Description
(Original description) The shell is sharply conical, composed of six rounded, non-margined whorls with a well-defined suture. The aperture is ovate, with a thin outer lip. The columella features a white, lamellar, twisted tooth.
The shell is predominantly white, roseate, or salmon in color, often retaining traces of a dark brown epidermis. The body whorl is noticeably lighter in color compared to the upper ones.
Distribution
This species is endemic to Hawaii and occurs on Maui Island.
References
Cowie, R. H., Evenhuis, N. L. & Christensen, C. C. (1995). Catalog of the native land and freshwater molluscs of the Hawaiian Islands. Leiden: Backhuys Publishers.
Begin with the source’s own compact description: “Amastra affinis” is species of gastropod. The dossier treats that line as a proposition to test through Amastra, affinis and species, not as a finished interpretation.
Why this record matters
The phrase “species of gastropod” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated May 28, 2026. The linked authority identifier is Q131388681. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1911, 1854 and 1995.
Scientific names, classifications and consensus can change while older terminology persists in catalogues and historical literature. 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.
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Three-step research path
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Questions for further research
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This entry incorporates text from “Amastra affinis” 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.