Malmidea isidiifera
species of lichen
Malmidea isidiifera is a species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Brazil and Venezuela.
Taxonomy
The lichen was formally described as a new species in 2021 by German lichenologist Klaus Kalb. The type specimen was collected from Itatiaia National Park (Rio de Janeiro) at an elevation of 1,100 m (3,600 ft). The species epithet alludes to the presence of isidia on the thallus. The species also occurs in Venezuela.
Description
Malmidea isidiifera is characterised by a crustose thallus that is continuous and has a thickness ranging from 30 to 70 μm. The thallus surface is smooth to slightly granular and dull, with a grey colour that turns orange-red when the cortex is abraded. The species is distinguished by its isidia, which are granular to coralloid, densely covering the thallus, each measuring 0.05–0.1 mm in length and 0.05 mm in width. The medulla of the thallus is orange-red and has a K+ (purple) chemical spot test reaction.
This brief starts where responsible research should: with the source description of “Malmidea isidiifera” as species of lichen. 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 species of lichen. 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 Dec 7, 2025. The linked authority identifier is Q123983844. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2021.
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 “Malmidea isidiifera”, its source revision and the description used here.
- Expand the search: follow Malmidea isidiifera primary sources, Malmidea isidiifera archive and Malmidea 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 “Malmidea isidiifera”?
- 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 “Malmidea isidiifera” 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.