Arthopyrenia stenospora Körb.

Parerga Lichenol., 5: 390, 1865
Synonyms:
Distribution: N - TAA (NImis & al. 2018).
Description: Thallus crustose, endosubstratic, brownish or not evident, not lichenized. Perithecia black, 0.1-0.2 mm across, circular in outline, with a slightly flattened apical part. Involucrellum dimidiate, brown, K-, of thick-walled hyphae; exciple colourless throughout; paraphysoids soon gelatinized, not evident in mature perithecia. Asci 8-spored, obpyriform, thick-walled and fissitunicate, 45-45 x 18-20 μm. Ascospores 1-septate, not constricted at septum, the two cells often of slightly different size, withour a median constriction, hyaline, almost bacilliform, 18-22 x 2.5-3(-4) μm, with a narrow gelatinous sheath. Pycnidia rare, black. Conidia 1-celled, narrowly ellipsoid or bacilliform, 3-4 x c. 1 μm. Photobiont absent. Spot tests: all negative. Chemistry: without lichen substances.
Note: on the smooth bark of deciduous trees, widespread throughout Europe but rarely collected, most records being historical.
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: extremely 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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Altitudinal distribution:

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