Bryobilimbia ahlesii (Körb.) Fryday, Printzen & S. Ekman

Lichenologist, 46: 29, 2014. Basionym: Biatora ahlesii Körb. - Parerga Lichenol.: 161, 1860.
Synonyms: Biatora valentior (Nyl.) Walt. Watson; Lecidea ahlesii (Körb.) Nyl.; Lecidea valentior Nyl.
Distribution: C - Tosc.
Description: Thallus crustose, episubstratic, continuous or rimose, more or less glossy, pale grey or grey-green, without a distinct prothallus. Medulla white, I-. Apothecia lecideine, 0.3-0.7(-1.2) mm across, sessile, reddish brown to brown-black, with a concave to slightly convex disc and a raised, persistent proper margin. Proper exciple dark reddish brown in outer part, pale reddish brown to colourless within; epithecium colourless or brownish, K-; hymenium colourless, but usually inspersed with blue-violet granules reacting K+ green, 65-90 µm high; paraphyses simple or sparingly branched and anastomosing in upper part, c. 1.5 µm thick at mid-level, the apical cells up to 3 µm wide, without a dark cap; hypothecium dark reddish brown, often with blue-violet granules. Asci 8-spored, clavate, with a I+ blue tholus and an internal, darker I+ tubular structure, the external gel I+ faintly blue, Porpidia-type. Ascospores 1-celled, hyaline, ellipsoid, 12-17 x (5-)6-7(-9) µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: thallus without lichen substances.
Note: on periodically inundated siliceous rocks in lowland areas. The record from Italy (see Nimis 1993: 377) is dubious.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

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