ITALIC 8.0

Gyalideopsis helvetica van den Boom & Vězda

Öst. Z. Pilzk., 9: 28, 2000.

Synonyms:

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

Description: Thallus crustose, episubstratic, thin and membranous, smooth, greyish green, slightly glossy, subgelatinous when wet, sorediate, the soralia scattered, excavate, c. 0.15 mm across. Hyphophores extremely rare (observed only once), brush-like on a short stalk, 150-170 µm high, brownish with whitish tips, located along the edge of a fertile thallus. Apothecia biatorine, 0.3-0.4 mm across, mostly adnate, but sometimes sessile and constricted at base, scattered or clustered, with a flat to slightly convex, reddish brown, epruinose disc and a usually paler, raised proper margin. Proper exciple of loosely anastomosing hyphae embedded in a gelatinous matrix; hymenium colourless, 60-65 µm high, K/I+ yellowish brown; paraphyses branched and anastomosing, c. 1.5 µm thick, not widened at apices; hypothecium colourless, up to 60 µm high. Asci 4(-8)-spored, cylindrical-clavate, thin-walled, apically thickened, the wall I-, the contents K/I+ reddish. Ascospores submuriform, with 5 transverse and (0-)1-2 longitudinal septa, constricted at septa, narrowly ellipsoid to fusiform, (18-)20-23(-25) x 4.5-7 µm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a species with a smooth, green-grey, glossy thallus and scattered excavate soralia, apothecia (when present) reddish-brown, with submuriform, fusiform ascospores in mostly 4-spored asci; it grows on fallen, decorticated tree trunks; widely distributed in the Holarctic region but altogether rare. The Italian sample was collected by G. Thor on a stump in the Stelvio National Park, in a subalpine, open Larix-stand.

Growth form: Crustose

Substrata: lignum

Photobiont: green algae other than Trentepohlia

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

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: very rare

Oromediterranean belt: absent

Montane belt: extremely 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

Index Fungorum GBIF