Acarospora gallica grows in full sun on siliceous rocks at usually below 500 m. It is currently considered rare in the Czech Republic, known only from a few specimens. Many recent identifications need revision, including Knudsen & Kocourková (2012).
Both A. fuscata and A. gallica can have a thallus of contiguous areoles with several punctiform apothecia as well as pseudolecanorine areoles. The anatomical measurements of both species overlap and they are usually the same color. Both have a cortex producing gyrophoric acid. Attempts to morphologically distinguish A. gallica from A. fuscata have failed. The character that distinguishes the two species is the hymenial gel of A. gallica is dark blue (euamyloid) in Lugol’s (see A. fuscata for more information). The neotype of A. gallica from France has euamyloid hymenial gel.
Literature: Knudsen K. & Kocourková J. (2012): Lichenological notes 4: a revision of Acarospora gallica (Acarosporaceae). – Mycotaxon 119: 373–380.taxonomic classification:
All records: 19, confirmed 2. One click on a selected square displays particular record(s), including their source(s).