Ividella navisa
species of mollusc
Ividella navisa is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. The species is one of a number within the genus Chrysallida.
Distribution
This marine species occurs in the following locations:
Gulf of Mexico
in the Pacific Ocean off the Galapagos Islands.
Description
The shell is of medium size and grows to a length of 2.7 mm. It is strongly sculptured, subdiaphanous to milk-white. The nuclear whorls number at least two, and are obliquely a little more than half immersed. The five post-nuclear whorls are strongly shouldered and subtabulated. They have a strong, broad, spiral keel limiting the anterior edge of the shoulder and an acute raised keel on the middle of the whorls between the sutures, while a third equally acute keel marks the periphery of the last whorl. Two other keels ornament the base, the anterior one of which is not quite as strong as its neighbor. The axial sculpture consists of narrow, more or less lamellar, almost vertical ribs, which render the intersection with the spiral keels somewhat thickened, but not nodulose.
The public source identifies “Ividella navisa” as species of mollusc. This brief keeps that definition visible, then builds a research path around Ividella, navisa and species.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Ividella navisa”, the useful work is to connect “species of mollusc” to the records capable of establishing context and consequence.
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 19, 2026. The linked authority identifier is Q61681717. 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.
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Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.
Three-step research path
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Questions for further research
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This entry incorporates text from “Ividella navisa” 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.