ITALIC 8.0

Protothelenella xylina H. Mayrhofer & Poelt

Herzogia 7, 1-2: 58, 1985

Synonyms:

Distribution:

Description: Thallus crustose, poorly evident, consisting of a few algal cells surrounded by hyphae, especially around the perithecia. Perithecia brown-black when dry, paler but always with a dark ostiole when wet, globose to weakly pyriform, up to 0.3 mm across, at least half-immersed in the thallus, covered with an epinecral layer in lower part. Exciple brown in upper part, paler in lower part, of strongly anastomosing, conglutinate, to 1 μm thick hyphae with narrow lumina; paraphysoids persistent, thread-like, 0.7-1 μm thick, branched and anastomosing in lower part; periphysoids absent; hymenial gel I+ reddish or I+ blue at low concentrations, K/I+ blue. Asci 8-spored, narrowly cylindrical, short-stalked, thick-walled (2-3 μm), fissitunicate, the outer gelatinous wall layer I+ blue, with a very faintly I+ blue apical plug. Ascospores submuriform to muriform, with 3-5 tranverse septa and 1-2 longitudinal septa, hyaline, ellipsoid-oblong, 24-32 x 10-14 μm. Photobiont chlorococcoid (Elliptochloris), the algal cells surrounded by a gelatinous sheath. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a species resembling P. sphinctrinoidella, but with an inconspicuous endoxylic thallus, and broader ascospores. growing on wood of Pinus cembra in the subalpine belt; rare in Central Europe, with a few records from the Alps (Switzerland, Austria); to be looked for in the Italian Alps.

Growth form: Crustose

Substrata: lignum

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

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