Allographa guainiae
species of lichen-forming fungus
Allographa guainiae is a species of crustose lichen-forming fungus in the family Graphidaceae. It is a green-gray, bark-dwelling lichen with prominent, straight, slit-like fruiting bodies with distinctively grooved black lips. The species was described in 2023 and is known only from palm-dominated forest in Guainía, Colombia.
Taxonomy
Allographa guainiae was described as a new species in 2023 by Robert Lücking, Norida Lucia Marín-Canchala, and Bibiana Moncada, based on material collected in Colombia (Guainía Department).
Description
The body (thallus) is a crust growing on bark, up to 7 cm across and about 100–150(–200) μm thick. Its surface is coarsely uneven to irregularly warty (verrucose), green-gray, and dull; no visible border zone (prothallus) is present, though a thin, irregular black line may appear where the thallus meets neighboring lichens. In cross-section, the thallus has a distinct, firm outer skin (cortex, 15–25 μm), a relatively thick algal layer (30–70 μm), and a thick inner tissue (medulla, 50–100 μm); crystals are present in both the algal layer and medulla, including clusters of calcium oxalate. The algal partner (photobiont) is from the green algal genus Trentepohlia.
The fruiting bodies are slit-like structures (lirellae) that are straight, unbranched, and prominently raised to sitting directly on the thallus surface (sessile), with a thallus-derived rim along the sides (lateral thalline margin). They are typically 1–3 (sometimes up to 5) mm long and 0.4–0.7 mm wide, with the inner disc hidden from view.
This brief starts where responsible research should: with the source description of “Allographa guainiae” as species of lichen-forming fungus. Everything that follows is an evidence route, not borrowed authority.
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The subject matters to the science & nature register because the source frames it as species of lichen-forming fungus. 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 Mar 4, 2026. The linked authority identifier is Q138566147. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2023.
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This entry incorporates text from “Allographa guainiae” 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.