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Lecidea lygommella Elix
Nomenclature
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Family: LecideaceaeGenus: Lecidea
Media
SUMMARY
Mycobank MB 517792
Thallus saxicolous, verrucose to evanescent, up to 7 cm wide, 0.2–0.7 mm thick. Upper surface whitish to pale grey or rusty red-brown, areolate, areoles irregular to angular, 0.5–1.0 mm wide, flat, surface roughened or ±smooth; cortex 20–50 µm thick, upper cell layer unpigmented to grey-brown. Photobiont layer 70–100 µm thick, algal cells 9–16 µm wide. Medulla I–. Hypothallus dark grey, sometimes obvious at the thallus margin but often not developed. Apothecia scattered or crowded, rounded to angular, subimmersed to adnate, rarely basally constricted, 0.5–2.3 mm wide; disc black, flat to slightly convex, matt, epruinose or with rusty, red-brown pruina, margin concolorus with disc, distict at first, persistent or excluded with age, rarely shiny. Hypothecium dark brown to black-brown in basal part, K+ violet-brown, 120–250 µm thick. Hymenium colourless, 60–85 µm high, I+ blue. Epihymenium brownish green, 10–15 µm high, N+ red-violet (cinereorufa-green); paraphyses occasionally branched and anastomosing, ca. 2 µm wide, apices thickened to 3–4 µm wide. Asci 8-spored, 50–65 x 11–13 µm. Ascospores simple, ellipsoidal, colourless, 10–17 x 5–8 µm. Pycnidia immersed, ostiole black, punctiform; conidia bacilliform, 9–12 x 1 µm. Secondary chemistry: nil.