Distribution: N - Frl, TAA, Lomb (HAL-18596), Piem (Matteucci & al. 2010). C - Tosc (Pasquinelli & al. 2009)
Description: Thallus crustose, episubstratic, continuous to faintly cracked, white, cream-coloured or greenish grey, often with orange stains when fresh. Apothecia lirelliform, black, raised from thallus, oblong, branched and flexuous, 1-4 x 0.3-0.5(-1) mm, with a usually slit-like disc, and a well-developed, distinctly longitudinally furrowed proper margin. Exciple black and carbonized, except sometimes at base below the hymenium, 75-150 µm wide laterally; epithecium brown; hymenium colourless, not inspersed with oil droplets, 100-120 µm high; paraphyses 1.5-2.5 µm thick, simple or rarely brached in upper part; hypothecium colourless, 20-50 µm high. Asci 8-spored, clavate, non-fissitunicate, opening through an apical split. Ascospores 8-12-septate, colourless (brown when overmature), fusiform-elongate, thick-walled, the locules more or less cylindrical to rounded, 32-55(-60) x 6-12(-15) µm, the wall reacting I+ dark violet. Photobiont trentepohlioid. Spot tests: K+ yellow turning orange-red, C-, KC- or KC+red, P+ faintly yellow-orange, UV-. Chemistry: norstictic and connorstictic acids.
Note: a mild-temperate to humid subtropical species found on smooth bark, especially of Ilex in warm-humid woodlands, to be looked for further in Tyrrhenian Italy. It is included in the Italian red list of epiphytic lichens as “Endangered” (Nascimbene & al. 2013c).
Growth form: Crustose
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)