ITALIC 7.0

Placidiopsis oreades Breuss

Öst. Z. Pilzk., 5: 87, 1996

Synonyms:

Distribution:

Description: Thallus squamulose, the squamules crenulate-lobulate, 1.5-3.5 mm broad, 0.2-0.4 mm thick, flattened to weakly convex, scattered to contiguous, usually not overlapping, adpressed to the substratum, pale brown to grey-brown, matt; lower surface brown, attached by a mat of c. 4 μm thick, colourless rhizohyphae. Upper cortex paraplectenchymatous, 25-50 μm thick, consisting of 7-12 μm wide cells, sometimes covered with a thin epinecral layer; algal layer 60-90 μm thick, poorly delimited from the medulla; lower cortex brown, (sub-)paraplectenchymatous. Perithecia frequent, laminal, immersed, pyriform, up to 0.3 mm across. Exciple initially colourless, then dark brown, of tangentially arranged, elongate cells; paraphyses absent, substituted by periphyses, the terminal cells somewhat enlarged; hymenium I+ reddish. Asci 8-spored, narrowly clavate, thin-walled, apically slightly thickened, with a small ocular chamber, K/I-. Ascospores 1-septate, not constricted at septum, hyaline, broadly ellipsoid, thin-walled, (14-)15-20 x (6.5-)7-9 μm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: on marly soil and in crevices near and above treeline, with scattered records from the mountains of Central Europe and Inner Asia, a few or which are from the Alps outside Italian territory; to be looked for in the Italian Alps.

Growth form: Squamulose

Substrata: soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

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