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Unio tumidus

species of mollusc

Specimen drawers, botanical folios and brass scientific instruments under study light
Science and natureInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionMay 19, 2026
Entity authorityQ577438 ↗
Source-derived summary

Unio tumidus, the swollen river mussel, is a species of freshwater mussel, an aquatic bivalve mollusc in the family Unionidae, the river mussels.

Subspecies

† Unio tumidus ludwigi Wenz, 1922

Synonyms

Distribution

Its native distribution is European.

Croatia

Czech Republic - in Bohemia, in Moravia, vulnerable (VU)

Germany

Germany - high endangered (Stark gefährdet)

Germany - Listed as a specially protected species in annex 1 in Bundesartenschutzverordnung.

Latvia

Lithuania - vulnerable

Netherlands

Poland

Slovakia

Sweden

British Isles - in England

References

External links

Retzius A.J. (1788). Dissertatio historico-naturalis sistens nova testaceorum genera. Quam præside D. M. Andr. J. Retzio (...) ad publicum examen defert Laurentius Münter Philipsson. 4+23 pp. Lund.

Spengler L. (1793).

Editorial summary

“Unio tumidus” enters the record as species of mollusc. Crown Archives preserves that source wording while asking what Unio, tumidus and species can confirm, complicate or overturn.

Editorial reviewA practical orientation to terminology and classification, particularly when read beside dated observations, specimens or technical literature. The current lead gives the account dated anchors—1922, 1788, 1793—that can be checked directly. The selected authority fields contribute no independent date. Its strongest next move is a source search built around Unio, tumidus and species.
Editorial analysis

Why this record matters

“Unio tumidus” is worth following because a concise public description often conceals a longer documentary argument. Here, Unio, tumidus and species provides the most credible route into that argument.

Evidence profile

Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated May 19, 2026. The linked authority identifier is Q577438. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1922, 1788 and 1793.

Critical limits

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.

Best used for
  • Current terminology
  • Classification context
  • Finding cited technical literature
Verify next

Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.

Three-step research path

  1. Establish the record: confirm the title “Unio tumidus”, its source revision and the description used here.
  2. Expand the search: follow Unio tumidus primary sources, Unio tumidus archive and Unio research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “Unio tumidus”?
  2. Which observation, specimen, dataset or publication supports the account?
  3. Has classification or technical consensus changed since the cited source?
Subject index

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Source & attribution

This entry incorporates text from “Unio tumidus” 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.