Tenellia
genus of molluscs
Tenellia is a genus of sea slugs, aeolid nudibranchs, marine gastropod molluscs in the family Trinchesiidae.
Taxonomic history
This was a small genus until a DNA phylogeny of the former family Tergipedidae resulted in most species of Cuthona being transferred to this genus.
Miller (2004) restricted the genus Cuthona (Alder & Hancock, 1855) to the type species, C. nana (Alder & Hancock, 1842), and transferred to the genus Trinchesia the rest of the species previously included in Cuthona. Miller has been followed by some authors, and has not been followed by others - and there is currently much instability on the extension and contents of these two genera. Cella et al., 2016 hypothesised that the genus Tenellia should include many former Cuthona and Trinchesia species, with others being placed in new genera. Since then, there has been much shuffling of species between genera, many species being returned from Trinchesia to Tenellia, and others being placed in several smaller genera, Catriona, Diaphoreolis, Phestilla, and Zelentia.
In the most recent study, Korshunova et al., 2025 re-examined genetic, physical, evolutionary, and environmental characteristics of species within the suborder Aeolidacea, and proposed a massive recategorization of taxons. It was stated that the previous "lumping" of taxa together obscures the diversity and evolutionary origins of species. The extensive study proposed reversing several previous mass species reassignments between genera, reinstating taxa that had fallen to synonymy in previous papers, restricting genera, and suggesting guidelines for how to categorize species that likely belong to yet-undiscovered genera.
While The World Register of Marine Species (WoRMS) has cited Korshunova et al., 2025 across other taxonomic adjustments, in regards to Trinchesiidae, who is possibly the most controversed Aeolidean family with papers being published nearly every year from opposing camps, there has yet to be adjustments.
This brief starts where responsible research should: with the source description of “Tenellia” as genus of molluscs. 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 genus of molluscs. Its deeper value depends on whether names, dates, institutions and citations support that framing.
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 18, 2026. The linked authority identifier is Q3983429. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2004, 1855, 1842 and 2016.
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.
- 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 “Tenellia”, its source revision and the description used here.
- Expand the search: follow Tenellia primary sources, Tenellia archive and Tenellia 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 “Tenellia”?
- Is the terminology current, historical or disputed?
- Which observation, specimen, dataset or publication supports the account?
Search terms from this dossier
This entry incorporates text from “Tenellia” 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.