ITALIC 8.0

Lecanora leptacinella Nyl.

in Norrlin, Not. Sällsk. Fauna Fl. Fenn. Förh., Ny Ser. ,13: 330, 1873.

Synonyms:

Distribution: N - TAA (Nascimbene & al. 2021, 2022).

Description: Thallus crustose, episubstratic, consisting of more or less scattered, yellowish white, strongly convex, up to 0.5 mm wide areoles. Apothecia usually abundant, lecanorine, scattered to clustered, 0.3-0.7 mm across, broadly sessile or constricted at base, with an initially flat, then slightly convex, pale to dark brown or finally almost black disc, and a thin, smooth, often finally excluded thalline margin. Thalline exciple with relatively few algae, corticate, the cortex 50-75 µm wide in basal parts, consisting of more or less anticlinally oriented, thick-walled hyphae, often inspersed with crystals, I+ faintly blue; medullary part rather loose, inspersed with crystals; epithecium greenish brown, brown in upper part, K+ greenish, N+ purple, often with granules dissolving in K and reacting C+ red; hymenium colourless, 50-60 µm high; paraphyses branched, coherent, the apical cells capitate; hypothecium colourless, up to 70 µm high, 1+blue. Asci 8-spored, clavate, Lecidella-type. Ascospores 1-celled, hyaline, ellipsoid, 7-10 x 4-5 µm. Photobiont chlorococcoid. Spot tests: thallus and apothecial margin K+ yellow, C+ red, KC+ red, P-. Chemistry: alectorialic acid (major), plus traces of barbatic acid.

Note: an arctic-alpine species growing on moribund mosses (Polytrichum, Rhacomitrium, rarely other bryophytes) or on branches of subalpine shrubs (mostly Rhododendron); known from several stations in the Alps, but largely overlooked.

Growth form: Crustose

Substrata: bark, soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: very rare

Subalpine belt: rare

Oromediterranean belt: absent

Montane belt: absent

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

Index Fungorum GBIF

Curtis Randall Björk – CC BY-SA 4.0

Northwest Territories, near MacKay Lake Date: 2011-08-00 On moss in brushy tundra

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (13314)
2002/12/12
white thallus with a single apothecium encrusting the leaflets of Polytrichum