ITALIC 8.0

Lecanora calabrica M. Brand & van den Boom

in van den Boom & Brand, Lichenologist, 40: 470, 2008.

Synonyms:

Distribution: C - Laz (van den Boom & Brand 2008), Abr (van den Boom & Brand 2008). S - Camp (van den Boom & Brand 2008), Cal (van den Boom & Brand 2008).

Description: Thallus crustose, continuous to weakly rimose, ecorticate, smooth, whitish, forming small patches to 1.5 cm in diam., often delimited by a bluish grey prothallus. Apothecia lecanorine, 0.4-0.6 mm across, broadly adpressed, with a flat to slightly convex, pale to dark brown disc and a thin, persistent, pale grey thalline margin. Thalline exciple corticate, the cortex 25-55 µm thick at base, colourless, consisting of anticlinally arranged, branched hyphae, often granulose in upper part; proper exciple colourless in inner part, brown in the outer rim, up to 35 µm wide; epithecium colourless to very pale brown, N+ violet-red; hymenium colourless, 45-70 µm high; paraphyses simple, conglutinated, up to 2.7 µm thick; hypothecium colourless, up to 120 µm high. Asci 8-spored, clavate, very thin-walled, with a K/I+ blue, tall tholus penetrated by a faintly amyloid apical cushion, the wall K/I-, surrounded by a blue outer layer, Lecanora-type. Ascospores 1-celled, hyaline, broadly ellipsoid to subglobose, 8.4-9.6 x 5-5.7 µm. Pycnidia immersed, colourless or pale brown near the ostiole. Conidia thread-like, curved, 22-27 x 0.6-0.9 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: thallus with isousnic acid.

Note: a recently-described species growing on the smooth bark of Abies and broad-leaved deciduous trees in mountain areas, apparently not uncommon in the southern part of the Italian Peninsula and also known from Croatia. It is superficially very similar to Polyozosia hagenii, differing in the chemistry and in the wider, subglobose spores. Several samples of P. hagenii reported from upland areas of Central and Southern Italy should be checked against this species.

Growth form: Crustose

Substrata: bark and lignum

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Pioneer species

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: rather common

Submediterranean belt: extremely rare

Padanian area: absent

Humid submediterranean belt: extremely rare

Humid mediterranean belt: absent

Dry mediterranean belt: absent

pH of the substrata:

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5

(info)

Solar irradiation:

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5

(info)

Aridity:

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5

(info)

Eutrophication:

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5

(info)

Poleotolerance:

0

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3

(info)

Altitudinal distribution:

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6

(info)

Predictive model

Index Fungorum GBIF