ITALIC 7.0

Lecanora handelii J. Steiner

in Handel-Mazzetti, Ann. naturhist. Hofmus. Wien, 23: 119, 1909.

Synonyms:

Distribution: N - Lomb (Nascimbene 2006), Piem, VA (Piervittori & Isocrono 1999).

Description: Thallus crustose, episubstratic, of dispersed to contiguous, flat to usually convex, grey-green to yellowish grey areoles often developing on a black hypothallus, sorediate, the soredia whitish, grey-green or blue-grey, 20-30 μm thick, arising from the margins of the areoles, later covering the whole surface. Medulla I-. Apothecia very rare, lecanorine, 0.2-0.5 mm across, sessile, with a pale reddish brown, sometimes blue-black-pruinose disc, and a persistent, not or scarcely raised, entire thalline margin. Epithecium colourless to pale yellowish brown, not granular; hymenium colourless, 50-65 μm high; paraphyses branched and anastomosing, 1.5-2.5 μm thick, the apical cells not or only slightly swollen; hypothecium colourless. Asci 8-spored, clavate, Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, 8-13 x 5-7 μm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC- or KC+ faintly yellow, P-, UV+ dull orange. Chemistry: usnic acid, zeorin.

Note: on steeply inclined to rain-sheltered surfaces of metal-rich siliceous rocks in upland areas. The record from Campania (see Nimis 1993: 353) requires confirmation, and is not accepted here.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

In underhangs rarely wetted by rain

Species of metal-rich rocks

Commonnes-rarity: (info)

Alpine belt: extremely rare

Subalpine belt: very rare

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

Dry mediterranean belt: absent

pH of the substrata:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Herbarium samples

Index Fungorum GBIF

P.L. Nimis CC BY-SA 4.0

TSB 33827