Distribution: N - Frl (TSB 26042), Ven (Thor & Nascimbene 2007).
Description: Thallus crustose (sometimes indistinctly subsquamulose when young), episubstratic, grey-green, diffuse, consisting of granular, goniocyst-like units and scattered, diffuse 60-250 μm thick soredia. Perithecia black, 0.2-0.4 mm across, semi-immersed in thallus. Exciple reddish brown but irregularly pigmented; involucrellum absent; hamathecium of periphyses, interascal filaments absent; hymenial gel I+ red (I+ yellowish or blue at low concentrations of I), K/I+ blue. Asci 8-spored, clavate, the wall thickened in upper part, K/I-. Ascospores (3-)5-7-septate, hyaline, ellipsoid-fusiform, (23-5)27-37(-43) x (5-)6-7.5(-8.5) μm. Photobiont chlorococcoid. Spot tests: thallus K-, KC-, C-, P-, UV+ orange-pink after heating. Chemistry: two unidentified terpenoids.
Note: a mild-temperate lichen, most often found on trees with subacid to base-rich bark, often on mosses; to be looked for further in Italy. It is included in the Italian red list of epiphytic lichens as “Data Deficient” (Nascimbene & al. 2013c).
Growth form: Squamulose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)