ITALIC 8.0

Peccania cerebriformis Henssen & Büdel

Int. J. Mycol. Lichenol., 1, 3: 263, 1984

Synonyms:

Distribution:

Description: Thallus foliose-subsquamulose, peltate, attached by a single central strand of rhizohyphae, black when dry, dark olive-brown when wet, the squamules up to 5 mm wide, 2.5-3 mm high, with erect, densely crowded, flattened, rounded, smooth, sometimes apically thickened lobules which give the thallus a subcerebriform appearance. Thallus ecorticate, the peripheral part 40-60 μm thick, with a loose network of anticlinally oriented hyphae enclosing the photobiont, the inner part with an irregular, 150-200 μm thick axial strand made of 2-3 μm thick, longitudinally oriented hyphae. Apothecia terminal to submarginal, at first urceolate then clearly lecanorine, 0.6-1 mm across, round to irregular in outline, with a dark brown to black, slightly concave to flat disc and a thick, prominent thalline margin. Proper exciple absent; epithecium yellowish brown, poorly differentiated; hymenium colourless, but with conspicuous brown to red-brown patches in the upper third, 70-95 μm high, I+ blue; paraphyses branched and anastomosing, 2-3.5 μm thick, constricted at septa, clearly capitate; hypothecium yellowish brown, 35-55 μm high. Asci (4-)8-spored, cylindrical-clavate, with a thin, one-layered, non-amyloid wall and passive spore discharge via apical rupturing. Ascospores 1-celled, hyaline, globose to broadly ellipsoid, 9-14 x 6-10 μm. Pycnidia terminal or marginal, immersed, globose to pyriform, unilocular, up to 200 μm across. Conidia 1-celled, hyaline, thread-like, curved, 20-30 x c. 1 μm. Photobiont cyanobacterial, chroococcoid, with single or paired 8-12 x 6-11 μm large cells often penetrated by haustoria, surrounded by a yellowish brown gelatinous sheath which tends to become thinner and paler in internal parts. Spot test: all negative. Chemistry: without lichen substances.

Note: a species described from the Canary Islands (Lanzarote), also known from Algeria, Morocco and SE Spain, growing on steeply inclined, sunny surfaces of calcareous or basic siliceous rocks with water seepage after rain; to be looked for in Mediterranean Italy.

Growth form: Squamulose

Substrata: rocks

Photobiont: cyanobacteria, coccaceous (e.g. Gloeocapsa)

Reproductive strategy: mainly sexual

On otherwise dry surfaces with short periods of water seepage after rain

pH of the substrata:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model

Index Fungorum GBIF

Manuel Gil

Spain, Canary Islands, Lanzarote
TSB 10442

Manuel Gil

Spain, Canary Islands, Lanzarote
TSB 10442

Manuel Gil

Spain, Canary Islands, Lanzarote

Manuel Gil

Spain, Canary Islands, Lanzarote

Manuel Gil

Spain, Canary Islands, Lanzarote