Buellia griseosquamulata Scheid.

Lichenologist, 25: 25, 1993.
Synonyms:
Distribution: C - Sar (Scheidegger 1993).
Description: Thallus crustose, episubstratic, areolate-subsquamulose, grey,. developing on the thalli of Buellia tirolensis. Medulla white, not amyloid, I-. Apothecia lecideine, black, 0.3-0.5 mm across, sessile but not constricted at base, with a flat, epruinose disc, and a thin, prominent proper margin. Proper exciple 18-25 |µm wide, dark brown to brown-black in outer part, colourless within, N-, aethalea-type; epithecium brown; hymenium colourless, c. 55 |µm high, without oil droplets; hypothecium dark brown, c. 100 |µm high. Asci 8-spored, clavate, Bacidia-type. Ascospores 1-septate, not constricted at septum, brown, broadly oblong, 9-5-11 x 5-9 |µm, Physconia-type, with a psilate ornamentation. Photobiont chlorococcoid. Spot tests: thallus and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: hitherto known only from the type collection, on granite near the coast.
Growth form: Squamulose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Taxon bound to maritime-coastal situations

Commonnes-rarity: (info)

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