ITALIC 8.0

Pertusaria luteola Boqueras

in Boqueras & Llimona, Mycotaxon, 88: 482, 2003.

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Distribution:

Description: Thallus crustose, thinly episubstratic, smooth to rimose, grey-green to yellow-green. Apothecia perithecioid, immersed in 0.5-0.8 mm wide fertile warts which are not constricted at base, opening through a punctiform, 0.1-0.2 mm wide, dark ostiole, usually 1 per wart. Epithecium dark green or blackish, K-; hymenium colourless, 45-120 μm high; paraphyses branched and anastomosing, 1-1.5 μm thick; hypothecium colourless, 10-40 μm high. Asci 2-spored, broadly cylindrical, the apex with a broad ocular chamber, the outer sheath K/I+ blue, otherwise K/I-, with an inner extensible layer, Pertusaria-type. Ascospores 1-celled, hyaline, ellipsoid, (70-)80-100(-106) x (25-)30-38(-42) μm, with a double, transversely striate wall. Photobiont chlorococcoid. Spot tests: medulla K+ yellow turning red (needle-like red crystals), C+ yellow, KC+ orange, P+ yellow-orange, UV+ orange. Chemistry: thiophaninic and norstictic acids.

Note: an epiphytic species apparently widespread in the Iberian Peninsula and also reported from France (Beudin 2025), resembling P. heterochroa, but with abundant norstictic acid. To be looked for in Mediterranean Italy, especially in Sardinia.

Growth form: Crustose

Substrata: bark

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

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Solar irradiation:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model