ITALIC 8.0

Lecanora quercicola Coppins & P. James

Lichenologist, 11: 145, 1979.

Synonyms:

Distribution: N - Lomb (Zocchi & al. 1997). C - Tosc, Sar (B 60 0153517, det Z. Palice).

Description: Thallus crustose, episubstratic, rimose-areolate to warted, rarely granular, yellowish grey, grey or pale grey-brown, without a distinct prothallus. Apothecia lecanorine, 0.2-0.5 mm across, with a flat to slightly convex, pale brown, grey brown or pale reddish brown, often faintly pruinose disc, and an often slightly paler, persistent, more or less crenulate thalline margin. Thalline exciple thinly corticate, the outer rim c. 20 μm wide, filled with granules; proper exciple often evident, yellowish, pseudoparenchymatous in inner part; epithecium yellowish to brown, N-, filled with yellowish granules; hymenium colourless, 40-50(-65) μm high; paraphyses mainly simple, (1.5-)2-2.5 μm thick at mid-level, the apical cells up to 3.5 μm wide; hypothecium colourless. Asci 8-spored, broadly clavate, Lecanora-type. Ascospores 1-celled, hyaline, narrowly ellipsoid, 8-10(-12) x 4-5 μm. Pycnidia of 2 types: a) 90-100 μm wide macropycnidia producing slightly curved, 8-12 x 2.5-3(-3.5) μm macroconidia (always present), b) to 70-90 μm wide micropycnidia producing 10-11 x c. 0.5 μm, curved, pointed microconidia (rare). Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV+ grey-white. Chemistry: isousnic acid, variable amounts of neousnic acid.

Note: on well-lit boles of ancient deciduous trees (e.g. Quercus, Castanea); mainly Tyrrhenian, but also reported from the Austrian Alps. It is included in the Italian red list of epiphytic lichens as “Critically Endangered” (Nascimbene & al. 2013c).

Growth form: Crustose

Substrata: bark

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: extremely rare

Padanian area: absent

Humid submediterranean belt: extremely rare

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 04

TSB 11183

P.L. Nimis CC BY-SA 04

TSB 11183