ITALIC 8.0

Arthonia pepei Etayo & Pérez-Ortega

Herzogia, 29, 2/1: 317, 2016.

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Distribution:

Description: Thallus inapparent, not lichenized, the hyphae developing inside the thalli of Parmelina-species, producing pinkish to cream-coloured, orbicular, 0.5-1.2 mm wide patches. Apothecia arthonioid, black, rounded, flat to slightly convex, 0.7-1.4 mm across, soon sessile, forming concentric circles of up to 15 apothecia, or crowded into convex, up to 3.7 mm wide pillows with uneven borders. Proper exciple absent or much reduced, up to 20 μm wide, bluish-brown, K+ olive, N+ orange-brown; epithecium dark brown to brown-black, K+ olive, N+ orange-brown; hymenium bluish grey, 30 μm high, I+ red, K/I+ blue; paraphysoids simple to branched, pigmented in upper part, 2-3-5 μm thick; hypothecium mostly colourless, with some brown-pigmented cells, 10-15 μm high. Asci 8-spored, clavate to ovoid, semi-fissitunicate, with a large, non-amyloid apical dome, an ocular chamber, and a distinct K/I+ blue ring in tholus, Arthonia-type. Ascospores 1-septate, with one cell slightly larger, hyaline, (8-)9.5-11 x 4-4.5 µm. Photobiont absent. Spot tests: K-, C-, KC-, P-. Chemistry: without lichen substances.

Note: a lichenicolous fungus growing on the thalli of Parmelina-species; described from Spain, to be looked for in Italy.

Growth form: Lichenicolous fungus

Substrata: bark

Reproductive strategy: mainly sexual

paras Parmelina-species

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

Source: Etayo, J. & Pérez-Ortega, S. 2016. Lichenicolous lichens and fungi from Monfragüe National Park (western Spain). – Herzogia 29: 315 –328.

Habitus on the thallus of Parmelina cryptotiliacea