ITALIC 7.0

Verrucula pusillaria Nav.-Ros. & Cl. Roux

in Navarro-Rosinés & al., Bull. Soc. linn. Provence, 58: 165, 2007

Synonyms:

Distribution:

Description: Thallus crustose, areolate, forming small patches (3-8 mm diam.) on the thalli of Calogaya pusilla. Areoles (0.2-)0.4-1(1.2) mm wide, 0,24-0.35(-0.5) μm thick, polygonal to rounded, flat to slightly convex, pale to medium brown, not or only weakly pruinose. Cortex 8-11 μm thick, of 1-2 layers of pale brown cells, generally covered by an epinecral layer; medulla white, 200-300 μm thick, with many large crystals, I-. Perithecia black, 0.14-0.22 mm across, 2-10(-20) per areole, globose, immersed or rarely slightly projecting with uppermost part. Involucrellum absent; exciple paraplectenchymatous, colourless except around the ostiole, 14-20 μm thick at base; hymenium colourless, I+ reddish; hamathecium of periphyses along the ostiolar channel, pseudoparaphyses in upper part of the perithecium, and paraphyses disappearing early; pseudoparaphyses 18-25 x 2.5-3 μm. Asci 8-spored, clavate, bitunicate, with a thin tholus reacting I-, Verrucaria-type. Ascospores 1-celled, hyaline, ellipsoid, (9.5-)10.5-13(-14) x (6-)6.5-9.5(-10) μm. Pycnidia infrequent, black, immersed, Dermatocarpon-type, the wall colourless except at the brown apex. Conidia simple, bacilliform, 4-6 x 1-1.5 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a lichenicolous lichen growing on the thalli of Calogaya pusilla, apparently widespread in Southern Europe; to be looked for in Italy

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

paras Calogaya pusilla

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

Serge Poumarat - Source: http://mycologie.catalogne.free.fr/lichenPhoto2012/Verrucula_pusillaria_3.jpg

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_V/Verrucula_pusillaria.htm

France, session AFL 2014 - vallée de l'Ubaye

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_V/Verrucula_pusillaria.htm

France, session AFL 2014 - vallée de l'Ubaye

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_V/Verrucula_pusillaria.htm

France, session AFL 2014 - vallée de l'Ubaye