Opegrapha cesareensis Nyl.

Flora, 51: 477, 1868.
Synonyms:
Distribution: C - Sar (B - Leg. H. Sipman nr. 24085).
Description: Thallus crustose, granulose, whitish to grey, sometimes poorly evident. Apothecia lirelliform, usually branched, 0.5-2 x 0.2-0.4 mm, black, epruinose, sessile to semi-immersed, sometimes clustered into subglobose pillows, with a slit-like disc and a raised proper margin. Proper exciple carbonized, extending below the hymenium; epithecium poorly developed, brownish; hymenium colourless, 65-90 µm high; I+ blue; paraphysoids branched and anastomosing, c. 1 µm thick, the apical cells hardly swollen; subhymenium brown, 20-30 µm high; hypothecium black, carbonized, up to 250 µm high. Asci 8-spored, cylindrical-clavate, the inner endoascus amyloid in upper part, with an amyloid ring-structure around the ocular chamber, intermediate between the calcarea- and the vulgata-types. Ascospores (2-)3-5(-7)-septate, hyaline, ellipsoid to subfusiform, straight or slightly curved, (13-)16-22(-25) x 3-4(-5) µm, with a thin gelatinous perispore which is visible only in young spores. Pycnidia black, immersed. Conidia hyaline, straight ot slightly curved, 4-7(-8) x 1-1.2 µm. Photobiont trentepohlioid. Spot tests: K-, C-, KC-, P-. Chemistry: without lichen substances. Note: a rare species growing on steeply inclined to underhanging surfaces of siliceous rocks, usually near the coasts. The material from Sardinia was collected at Punta Falcone (Sassari), on siliceous schist boulders and outcrops on ste
Note: a rare species growing on steeply inclined to underhanging surfaces of siliceous rocks, usually near the coasts. The material from Sardinia was collected at Punta Falcone (Sassari), on siliceous schist boulders and outcrops on steep slopes with garrigue at seashore.
Growth form: Crustose
Substrata: rocks
Photobiont: Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
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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Predictive model

Source: http://fungi.myspecies.info/all-fungi/opegrapha-cesareensis CC BY-NC