ITALIC 7.0

Buellia mediterranea Giralt

in Giralt & Llimona, Mycotaxon, 75: 189, 2000

Synonyms:

Distribution:

Description: Thallus crustose, thinly episubstratic, whitish to whitish grey, smooth to rimose, often delimited by a black prothallus. Medulla I-. Apothecia lecideine, (0.2-)0.4-0.6 mm across, adnate to sessile, with a flat to slightly convex usually epruinose but sometimes thinly white-pruinose disc, and an initially rather thick and prominent, then thinner, rarely finally excluded proper margin. Proper exciple brown to olivaceous, 40-60 µm wide, K- (section!); epithecium brown to olivaceous: hymenium colourless, without oil droplets, 70-90 µm high; paraphyses c. 2 µm thick at mid-level the apical cells (3-)4-5.5 µm wide, brown-pigmented; hypothecium with oil droplets. Asci 8-spored, clavate, Bacidia-type. Ascospores 1-septate, brown, often slightly curved, (12-)14-17(-19) x (5-)5.5-7(-8.5) µm, Callispora-type with a slight subapical wall thickening when young, Buellia-type at maturity, the apices pointed, the wall roughly ornamented, the ontogeny of type C (subapical inner wall thickenings produced before septum formation). Photobiont chlorococcoid. Spot tests: K+ yellow, C-, KC-, P-. Chemistry: thallus with atranorin.

Note: a Mediterranean Macaronesian, epiphytic, pioneer species growing on twigs of evergreen shrubs and trees, including conifers; to be looked for in Mediterranean Italy.

Growth form: Crustose

Substrata: bark

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Pioneer species

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