Protohydnum
genus of fungi
Protohydnum is a genus of fungi in the order Auriculariales. Protohydnum cartilagineum, the type, occurs in Central and South America and produces effused, gelatinous basidiocarps (fruit bodies) on wood, wholly covered in small spines. Molecular research, based on cladistic analysis of DNA sequences, has shown that the genus is distinct, but that other similar-looking species previously referred to Protohydnum belong in the genera Hyalodon or Elmerina. More recent molecular research has shown that the genera Bourdotia and Ductifera, producing smooth, effused or lobed, gelatinous basidiocarps, are synonyms of Protohydnum.
Taxonomy
The genus was first described from Brazil in 1895 by German mycologist Alfred Möller to accommodate Protohydnum cartilagineum, a species producing effused, cartilaginous-gelatinous basidiocarps on wood, wholly covered in small spines, and (microscopically) containing stalked, tremelloid (vertically septate) basidia. Several other species having similar features were later added to the genus.
Molecular research, based on cladistic analysis of DNA sequences, showed that Protohydnum cartilagineum represented a distinct genus in a clade that included species of Bourdotia and Ductifera. The European Protohydnum piceicola was found to be unrelated and moved to the new genus Hyalodon, whilst the south-east Asian Protohydnum sclerodontium was moved to the genus Elmerina. Subsequent research supported these results and indicated that Protohydnum, Bourdotia, and Ductifera represented a single genus, with Protohydnum the earliest name.
Bourdotia was originally published in 1908 by Italian mycologist Giacomo Bresadola as a subgenus of Sebacina having cystidia with oily contents (gloeocystidia).
Begin with the source’s own compact description: “Protohydnum” is genus of fungi. The dossier treats that line as a proposition to test through Protohydnum, genus and fungi, not as a finished interpretation.
Why this record matters
The phrase “genus of fungi” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Sep 14, 2026. The linked authority identifier is Q10640686. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1895 and 1908.
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.
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 “Protohydnum”, its source revision and the description used here.
- Expand the search: follow Protohydnum primary sources, Protohydnum archive and Protohydnum 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 “Protohydnum”?
- Has classification or technical consensus changed since the cited source?
- Is the terminology current, historical or disputed?
Search terms from this dossier
This entry incorporates text from “Protohydnum” 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.