Antiplanes sanctiioannis
species of mollusc

Antiplanes sanctiioannis is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids.
Description
The length of the shell varies between 20 mm and 40 mm; maximum diameter 14 mm.
The fusiform shell contains 10 slightly convex whorls. The shell is clothed with a smooth, thickish, olive epidermis. The shell is covered with very narrow spiral striae and incremental flexuous stripes. The dark reddish aperture is ovate and contracted below. It measures about 2/5 of the total length. The siphonal canal is broad and slightly oblique. The narrow outer lip has a wide sinuation above the middle. The columella is twisted.
“Antiplanes sanctiioannis” enters the record as species of mollusc. Crown Archives preserves that source wording while asking what Antiplanes, sanctiioannis and species can confirm, complicate or overturn.
Why this record matters
“Antiplanes sanctiioannis” is worth following because a concise public description often conceals a longer documentary argument. Here, Antiplanes, sanctiioannis and species provides the most credible route into that argument.
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 Jun 4, 2026. The linked authority identifier is Q1602373. 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 “Antiplanes sanctiioannis” 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.