Description: Thallus crustose, endosubstratic or rarely thinly episubstratic and then finely granular, ecorticate. Apothecia stalked, pin-like, epruinose, shining black. Stalk slender, 0.5-1.5 mm high, sometimes branched and bearing 2-5 capitula, of periclinally arranged, medium brown hyphae: Capitula spherical, with a poorly developed excipulum continuous with the stalk tissue, epruinose but lower side sometimes appearing pruinose from short projecting hyphae. Mazaedium well-developed, brown; hypothecium medium brown, broadly obconical, with a strongly convex upper surface. Asci cylindrical, ellipsoid or irregular, formed in chains, dissolving early, with 1- or 2-seriate ascospores. Ascospores 1-celled, brown to pale brown, globose, 3.5-4.5 µm wide, the wall smooth or with irregular fissures. Photobiont chlorococcoid (Dictyochloropsis). Spot tests: thallus K-, C-, KC-, P- or P+ yellowish red, UV+ white. Chemistry: thallus with baeomycesic and squamatic acids.
Note: on relatively soft-decomposed lignum of old coniferous stumps in humid woodlands, more rarely on wood of deciduous trees or even of Quercus ilex, very rarely corticolous. Old records from Sicily, not validated by Puntillo & Puntillo (2009) are excluded here. The species is included in the Italian red list of epiphytic lichens as “Near-threatened” (Nascimbene & al. 2013c).
, Brasilien, Minas Gerais, oberhalb der Ortschaft Tiradentes bei São João del Rei, in einem dunklen und feuchten primären, submantanen Regenwald, 21°10' S, 44°10' W, 900 m. Leg. K. Kalb & G. Plöbst, 06.07.1978, det. L. Tibell. KALB: LICHENES NEOTROPICI NR. 605.
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11866) 2001/12/05
Felix Schumm - CC BY-SA 4.0
, Brazil, Rio de Janeiro, Serra da Mantiqueira, Itatiaia between Registro do Picú and Agulhas Negras, on wood within a mossy bank along the road, 2000 m, 22°20' S, 44°45' W. K. Kalb, 12.07.19797, det. A. Aptroot. KALB & APTROOT: LICHENES NEOTROPICI NR. 631.