Imke Schmitt

Ochrolechia is the sole genus in the fungal family Ochrolechiaceae. It comprises about 40 species of crustose lichens. These lichens typically form uneven, often thick, crust-like growths on various surfaces and are characterised by their white to pale grey thalli, which may have a greenish tint. The genus has a long evolutionary history, with fossils dating back to the Paleogene period, about 34 million years ago. Ochrolechia species have disc-like apothecia (fruiting bodies), which are usually yellowish or brownish-pink and often covered with a fine white powdery coating. The genus is

Ainoa is a genus of lichens in the family Baeomycetaceae. It was named in honour of the German lichenologist Aino Henssen. These rock-dwelling lichens form thin crusts that break into small flakes and are distinguished by their abundant dark brown to black button-like fruiting bodies that sit on short stalks. The genus includes three species found in cool mountainous regions, where they grow on hard siliceous rocks and can withstand repeated cycles of wetting and drying.

Lepra erythrella is a species of Corticolous lichen in the family Pertusariaceae. Found in Australia, New Zealand and the Galapagos Islands, it was formally described as Pertusaria erythrella in 1893 by Johannes Müller Argoviensis.

Varicellaria hemisphaerica is a species of corticolous (bark-dwelling) crustose lichen belonging to the family Varicellariaceae. It has an almost cosmopolitan distribution.

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Neoprotoparmelia is a genus of crustose lichens that was created in 2018. It contains 24 tropical and subtropical species that mostly grow on bark. Neoprotoparmelia is in the subfamily Protoparmelioideae of the family Parmeliaceae, along with the morphologically similar genera Protoparmelia and Maronina.

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Varicellaria philippina is a species of crustose lichen in the family Varicellariaceae. It was first described in 1913 in Mindanao, Philippines, and has since been found in Papua New Guinea as well. The lichen forms a whitish crust on tree bark and produces distinctive raised fruiting structures that contain large ascospores. Originally classified in the genus Pertusaria, it was transferred to Varicellaria in 2012 based on molecular and morphological evidence.

Varicellaria lactea is a crustose lichen in the family Varicellariaceae. It forms a relatively thick, white to grey‑white, matt crust that breaks into small, tile‑like patches and carries scattered white, powdery soralia (patches that shed tiny propagules); sexual fruiting bodies are rare, and when present they produce a single very large spore, with the lichen containing lecanoric and variolaric acids. Ecologically it is chiefly rock‑dwelling on lime-free siliceous and volcanic rocks in humid, shaded situations, and is widespread in Europe with confirmed records from the Azores, South Korea,

Varicellaria kasandjeffii is a species of crustose lichen in the family Varicellariaceae. It forms a thick, milk-white crust dotted with small rounded to cylindrical bumps, and grows on volcanic rock in mountainous regions of southeastern Europe. Originally described in 1930 from Bulgaria's Rhodope Mountains, the species was later transferred to the genus Varicellaria based on its discoid fruiting bodies and distinctive chemistry, which includes lecanoric and variolaric acids.

Lecanora mugambii is a species of crustose lichen in the family Lecanoraceae. Found in western Kenya, it was described as new to science in 2011.

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Neoprotoparmelia capitata is a species of corticolous (bark-dwelling) and crustose lichen in the family Parmeliaceae. It is found in eastern North America.

Gyalectaria diluta is a species of crustose lichen in the family Coccotremataceae, first found in inland rainforests of British Columbia. This pale, crust-forming lichen grows on the bark of conifer trees in very humid old-growth forests, where it forms small patches that bleach the underlying bark to whitish or pale green-grey colours. It is found from British Columbia to Montana and Idaho, typically growing on smooth bark of young cedar saplings beneath mature forest canopies that have remained undisturbed for centuries.

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Lepra austropacifica is a species of corticolous (bark-dwelling) crustose lichen in the family Pertusariaceae. Known from low-elevation forests in the South Pacific, it forms a thin, pale crust dotted with small, rounded patches of powdery reproductive granules (soredia). The species closely resembles Lepra scaberula in outward appearance and chemistry, but it is recognised as distinct based on DNA sequence data.