in Prieto & al., Am. J. Bot., 99: 28, 2012. Basionym: Catapyrenium semaforonense Breuss - Stapfia, 23: 112, 1990.
Synonyms: Dermatocarpella yunnana H. Harada & Li-S. Wang; Endopyrenium hepaticum f. nigratum Müll. Arg.; Placidium semaforonense (Breuss) Breuss
Distribution: C - Sar. S - Pugl.
Description: Thallus squamulose, brown, often grey-pruinose at margins, dull. Squamules 3-7 mm broad, rounded to lobulate, flattened, smooth, with an undulate, mostly up-turned margin, scattered to contiguous, not imbricate. Lower surface pale, but often becoming dark with age, attached by dichotomously branched, (50-)100-250 μm long, robust rhizines. Upper cortex paraplectenchymatous, lower cortex poorly differentiated, with cells not arranged in vertical rows. Rhizohyphae colourless, thin (3.5-5.5 μm thick). Perithecia frequent, laminal, half immersed, globose to pyriform, to 0.5 mm in diam., without involucrellum. Perithecial wall pale throughout; hymenium K/I+ blue; paraphyses absent, substituted by periphyses. Asci 8-spored, subcylindrical, thin-walled, I , without a tholus. Ascospores 1-celled, hyaline, broadly ellipsoid, thin-walled, uniseriately arranged, (12-)14-18(-19) x (7-)7.5-9(-10) μm. Pycnidia black, marginal, immersed. Conidia ellipsoid, 3-4.5 x 1.5-2 μm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P- UV-. Chemistry: without lichen substances.
Note: a Macaronesian-Mediterranean to Irano-Turanic terricolous lichen, also known from on fine-sandy soils in open, dry Mediterranean grasslands and garrigues. See also note on the genus.
Growth form: Squamulose
Substrata: soil, terricolous mosses, and plant debris