Preliminary version 1 October 2013
Stirtonia psoromica Aptroot & Wolseley
in Wolseley & Aptroot, Bibliotheca Lichenologica 99: 419 (2009).
Synonym: Index Fungorum
Type: Thailand, Chiang Mai Prov., Doi Suthep, Wat Palad, 25 November 1991, Wolseley & Aguirre-Hudson 5930 (BM - holotype).
Barcode:
Coordinates:
Thallus: crustose, spreading, covering an area of up to 5 cm diameter, contiguous, smooth, dirty whitish, less than 0.1 mm thick, slightly shiny, with calcium oxalate crystals, IKI-. Ascigerous zones delimited, round to slightly elongated in outline, 0.3 - 0.7 mm diameter, always higher than the thallus, white, pruinose, inconspicuously black dotted when abraded, with calcium oxalate crystals, without algal cells, IKI+ blue. Asci in surface view black, ovoid, with 8 ascospores. Ascospores generally 7-9-septate, fusiform, 75 - 87 / 12 - 16 µm, cells generally equal, walls and septa >1 µm thick (Aptroot 2009: 622).
Photobiont: Green alga.
Chemistry: Psoromic acid, conpsoromic acid (TLC). Thallus C-, Pd+ yellow, KOH-, medulla UV- (Aptroot 2009: 622).
Ecology: Data lacking.
Molecular data: Genbank
Distribution: Database
Note: