Dictyographa

About

Dictyographa is a genus of lichen-forming fungi in the family Opegraphaceae. It comprises three species of corticolous (bark-dwelling), crustose lichens. The genus was originally described by the Swiss scientist Johannes Müller Argoviensis in 1893, who distinguished it from related genera by its unique spore structure and interconnected filaments within its reproductive organs. Dictyographa lichens are characterised by their elongated, slit-like fruiting bodies and spores that are divided by both vertical and horizontal internal walls. The genus has been subject to taxonomic debate, with some researchers proposing to merge it with the related genus Opegrapha. However, genetic studies have since confirmed Dictyographa as a distinct evolutionary lineage. These lichens are found in various parts of the world, including Africa, the Middle East, and Hawaii, typically growing in coastal environments.

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