Eberhard Fischer

Syncesia madagascariensis is a rare species of crustose lichen in the family Roccellaceae. It is found in Madagascar. This lichen forms large, continuous patches up to 15 cm across on tree bark, with a creamy surface that becomes increasingly cracked with age and distinctive flattened, disc-shaped fruiting bodies that show radiating ridge patterns. It is known only from montane forests near Ambositra at 1705 metres elevation, where it grows on tree trunks in forests dominated by myrtle family trees.

Syncesia afromontana is a rare species of lichen-forming fungus in the family Roccellaceae. It is found in Rwanda. The lichen has a byssoid (wispy, like teased wool), water-repellent thallus that is greyish to greyish-green and up to 10 cm (4 in) in diameter. It contains protocetraric acid as a major metabolite, and trace amounts of roccellic acid. It is distinguished from other members of its genus by producing ascospores with seven internal divisions rather than the typical three, making it unique within the group.

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Hypotrachyna rwandensis is a species of saxicoous (rock-dwelling) foliose lichen in the family Parmeliaceae. It was discovered in 1999 in a high-elevation swamp environment in southern Rwanda, where it grows exclusively on ancient schist rock formations. The species is distinguished by its greyish, leaf-like appearance with fine hair-like projections along the edges and dense, branching reproductive structures on its surface. As of 2007, it remains one of five Hypotrachyna species documented in Rwanda.

Tricharia nigriuncinata is a species of foliicolous (leaf-dwelling) lichen in the family Gomphillaceae. It is found in East Africa.

Savoronala is a fungal genus in the family Malmideaceae. It is monotypic, containing the single species Savoronala madagascariensis. This lichen produces unique conidia (asexual spores) that each include a single algal cell.

Isalonactis is a monotypic fungal genus in the family Roccellaceae. It contains the single species Isalonactis madagascariensis, a saxicolous (rock-dwelling), crustose lichen found in Madagascar. This lichen forms thin, cream-coloured crusts on sandstone rocks and produces tiny fruiting bodies dusted with white crystals. The genus was established in 2014 when scientists discovered this unique lichen in Madagascar's Isalo region and determined it was genetically distinct from all known lichen groups.

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Dirina madagascariensis is a species of crustose lichen in the family Roccellaceae. Found in southern Madagascar, it was formally described as a new species in 2013 by lichenologists Anders Tehler, Damien Ertz, Dorothee Killmann, Tahina Razafindrahaja, Emmanuël Sérusiaux, and Eberhard Fischer. The type specimen was collected by the second author from Taolagnaro (Fort-Dauphin). It has been recorded growing both on rocks (usually calciferous) and on the bark of various trees and shrubs. The lichen has a creamy white to white-greyish thallus (0.1–1.5 mm thick) with a chalk-like medulla. Its

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