Diorygma cameroonense
species of lichen
Diorygma cameroonense is a little-known species of corticolous (bark-dwelling) script lichen in the family Graphidaceae. It is found in the pristine rainforests of eastern Cameroon. This lichen is distinct due to its larger ascospores with more septa compared to the closely related Diorygma sticticum.
Taxonomy
Diorygma cameroonense was formally described as a new species in 2020 by German lichenologist Klaus Kalb. The species name, cameroonense, refers to the country where it was collected. The type specimen was collected on 1 April 1999 in Bewala II Village near Ngatto, East Province, Cameroon, in a pristine rainforest along the Boumba River.
Description
The thallus of Diorygma cameroonense is corticolous, greenish-grey, and can reach up to 10 cm (4 in) in diameter. It has a smooth to uneven surface and is 100–125 μm thick. The lichen's fruit bodies are in the form of lirellae, which are single, unbranched or stellately to irregularly branched, and immersed to erumpent with a thick, complete thalline margin. Ascospores are ellipsoid and somewhat muriform, measuring 15–20 by 5–8 μm, with 3–5 transverse and 0–1 longitudinal septa in 1 or 2 segments.
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Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Oct 23, 2025. The linked authority identifier is Q107638473. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2020 and 1999.
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This entry incorporates text from “Diorygma cameroonense” 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.