Austrofusus selwyni
species of gastropod
Austrofusus selwyni is an extinct species of medium-sized sea snail or whelk, a marine gastropod mollusc in the family Prosiphonidae.
Description
The shell measures 16 mm in height and 10 mm in diameter.
(Original description) The shell is small and rather thin—at times appearing very thin and fragile—with an elevated, prominent, and acute spire composed of strongly convex and costated whorls. These whorls culminate in a full, ventricose body whorl characterized by a comparatively large aperture and a very short, twisted siphonal canal.
The apical angle measures approximately 50° to 55°. The apex consists of about two smooth, well-defined, and convex embryonic whorls that feature a centrally immersed tip. These embryonic whorls are succeeded by five gradually increasing and markedly convex whorls, which are joined by a well-defined and somewhat impressed suture; occasional specimens appear more constricted at the suture than is typical for the species. The greatest convexity occurs around the middle of each whorl, though there is a tendency toward shouldering at the posterior third. This is a consequence of the slope on the posterior third being somewhat more abrupt and flatter than the more regularly rounded and convex anterior two-thirds. The spire whorls terminate in a broad, ventricose body whorl with a large, oval aperture.
This brief starts where responsible research should: with the source description of “Austrofusus selwyni” as species of gastropod. 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 gastropod. 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 Jun 3, 2026. The linked authority identifier is Q139092547.
A general summary may omit uncertainty, sample limits or methodological disagreement that is explicit in the technical record. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. 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 “Austrofusus selwyni” 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.