Acarospora badiofusca (Nyl.) Th. Fr.

Acarospora badiofusca is a montane species with a conspicuous thallus of large contiguous or dispersed brown areoles up to 3 mm wide with large red-black apothecia up to 2 mm, immersed or in an elevated parathecial margin. It has a low hymenium (usually 60–80 µm) with stout paraphyses up to 3 µm wide, and dark blue hymenial gel in Lugol’s.

It occurs both in full sun, sometimes on scattered pebbles and boulders, as well as under-hangs and other sheltered microhabitats, in Asia, Europe, and North America. It usually grows on base-rich or lime-enriched siliceous rock, like mica-shists, diabase, and calciferous sandstones, but also has been collected on granite, quartzite, and iron-rich rock. Acarospora badiofusca is rare in the Czech Republic. It occurs above 1200 m and recent records are reported only from the Hrubý Jeseník Mts. Old records from lower elevations need to be revised. These determinations are usually A. irregularis.

Literature: Knudsen K., Kocourková J. & Nordin A. (2014): Conspicuous similarity hides diversity in the Acarospora badiofusca group (Acarosporaceae). – Bryologist 117: 319–328.

taxonomic classification:

Ascomycota Lecanoromycetes Acarosporales Acarosporaceae Acarospora

Red List (Liška & Palice 2010):VU – vulnerable
Red List (Malíček 2023):C1 – critically endangered

Occurrence in the Czech Republic

All records: 7, confirmed 5. One click on a selected square displays particular record(s), including their source(s).


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Altitude preferences

Distribution Timeline

Substrate type

Substrate preferences

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