Gyalolechia desertorum (Tomin) Søchting, Frödén & Arup

in Arup, Søchting & Frödén, Nordic J. Bot. 31: 70 (2013).

Basionym: Placodium desertorum Tomin, Literature lacking in IF xxx: 11 (1925).

Type: Not located by Arup et al. (2013) LE?.
Thallus: crustose, dispersed into elements, up to 2.5 cm in diam.; upper surface yellow or orange, covered with whitish pruina, with schizidia; upper cortex paraplectenchymatous, 25-60 µm thick including a up to 35 µm thick epinecral layer; medulla white, 40-160 µm; algal layer: indistinct, 25-150 µm thick, with scattered, algae cells dispersed through the whole medulla; lower cortex absent; lower surface gelatinized, with compressed hyhae. Apothecia common, sessile, up to 1.5 mm in diam.; disc flat, becoming convex or rarely concave in old ones; margin smooth, brighter than disc; asci clavate, 8-spored. Ascospores hyaline, 1-septate, ellipsoid, 10-15 x 4-7 µm. Pycnidia unilocular or plurilocular; conidiophores branched or pseudoparenchymatous arranged; conidiogenous cells: terminally or intercalary arranged, acrogenous or pleurogenous, with "bayonet-like" projections conidia: hyaline, simple, oblong, 3-3.5 x 1-1.2 µm. (Nash et al. 2001: xx).

Photobiont: Data lacking.

Chemistry: Anthraquinone pigments. (Nash et al. 2001: xx).

Ecology: Soil and eroding sediments in dry habitats.