Seguenzia formosa
species of mollusc
Seguenzia formosa is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae. The epithet "formosa" means "beautiful".
It resembles Seguenzia monocingulata and has been regarded as a synonym of that (extinct) species. However the two species are distinct, based on shell morphology.
Description
(Original description by J.G. Jeffreys) The rather thin, semitransparent, nacreous and glossy shell has a globosely conical shape.
The sculpture of the shell shows sharp keel-like spiral ribs or ridges, of which there are two on the middle of the body whorl (besides ten thread-like riblets on the base) and one on the middle of each of the other whorls. There is also a slighter rib immediately below the suture. Between the ribs the surface is covered with numerous and delicate curved striae, which turn alternately in different directions, so as to give a flexuous character to this part of the sculpture. The striae between the infrasutural and peripheral rib turn of the left, while those between the peripheral and the next rib (or in the upper whorls
between the rib in the middle and the base) turn to the right. The same alternate order is to a great extent observable as to the direction of the striae on the base of the body whorl.
“Seguenzia formosa” enters the record as species of mollusc. Crown Archives preserves that source wording while asking what Seguenzia, formosa and species can confirm, complicate or overturn.
Why this record matters
“Seguenzia formosa” is worth following because a concise public description often conceals a longer documentary argument. Here, Seguenzia, formosa 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 May 22, 2026. The linked authority identifier is Q3729550. 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 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.
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 “Seguenzia formosa”, its source revision and the description used here.
- Expand the search: follow Seguenzia formosa primary sources, Seguenzia formosa archive and Seguenzia 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 “Seguenzia formosa”?
- Which observation, specimen, dataset or publication supports the account?
- Has classification or technical consensus changed since the cited source?
Search terms from this dossier
This entry incorporates text from “Seguenzia formosa” 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.