Arthopyrenia pithyophila Th. Fr. & Blomb.

Bot. Not.: 155, 1867.
Synonyms:
Distribution: N - Lomb (UPS- L166794).
Description: Thallus crustose, thinly episubstratic, forming orbicular, whitish to grey-green patches, without brown hyphae, not lichenized. Perithecia black, matt, scattered to clustered, at first covered by a thin layer of periderm, later projecting with a slightly flattened apical part, round in outline, c. 0.2-0.25 mm across. Involucrellum dimidiate, c. 45 μm thick, K-; exciple colourless, surrounding the centrum; pseudoparaphyses persistent, branched and anastomosing. Asci 8-spored, cylindrical-clavate, fissitunicate, c. 60-75 x 24 μm. Ascospores 3-septate, slightly constricted at septa, soon turning brown, long-ellipsoid to fusiform, 22-26 x 5-7 μm. Photobiont: probably absent. Spot tests: all negative. Chemistry: without lichen substances.
Note: a pioneer, non-lichenised species growing on the bark of coniferous and deciduous trees; the sample from Italy was collected by G. Thor in the Adamello Natural Park, on Sorbus aucuparia.
Growth form: Fungus
Substrata: bark
Reproductive strategy: mainly sexual
Pioneer species

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: absent
Dry mediterranean belt: absent


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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Source: Keissler K. von 1938. Pyrenulaceae, Mycoporaceae, Coniocarpineae. In: Rabenhorst G L: Kryptogamen-Flora von Deutschland, Österreich und der Schweiz. 2nd, IX, Die Flechten, Abt. 1, 2. Gebr. Borntraeger, Leipzig, pp. 1-846.


Source: Keissler K. von 1938. Pyrenulaceae, Mycoporaceae, Coniocarpineae. In: Rabenhorst G L: Kryptogamen-Flora von Deutschland, Österreich und der Schweiz. 2nd, IX, Die Flechten, Abt. 1, 2. Gebr. Borntraeger, Leipzig, pp. 1-846.