ITALIC 8.0

Schaereria parasemella (Nyl.) Lumbsch

J. Hattori Bot. Lab. ,83: 64, 1997. Basionym: Lecidea parasemella Nyl. - Flora, 51: 344, 1868

Synonyms: Hafellnera parasemella (Nyl.) Houmeau & Cl. Roux

Distribution:

Description: Thallus crustose, thinly episubstratic, continuous and film-like to minutely granulose-verrucose, the granules to 0.2 mm wide, rarely larger and papilliform, whitish to pale brown, glossy, esorediate. Apothecia lecideine, circular in outline, 0.15-0.3 mm across, glossy black to black-brown, epruinose, adnate, with a concave to slightly convex disc and a thin, finally often excluded proper margin. Proper exciple brown or reddish brown; epithecium blue-green to pale blue; hymenium colourless, (60-)80-100 μm high; paraphyses lax, sparingly branched and rarely anastomosing in upper part, 1.5-2.5 μm thick, the apical cells up to 3 μm wide; subhymenium pale brown or pale reddish brown; hypothecium dark brown. Asci 8-spored, cylindrical, thin-walled, with a single wall layer, not thickened apically, only the outermost gelatinous layer K/I+ faintly blue, discharge by splitting of the apex, Schaereria-type. Ascospores 1-celled, hyaline, broadly ellipsoid to subglobose, 9-15 x 8-11 μm, thick-walled, surrounded by a gelatinous epispore. Photobiont chlorococcoid, the cells up to 12 μm wide. Spot tests: thallus K- or K+ brownish, C-, KC-, P-. Chemistry: probably without lichen substances.

Note: on plant debris overgrown by crustose lichens, mainly Biatora vernalis over acid substrata near and above treeline; rare, with very few scattered records from the Alps, some of which are not far from the Italian border. To be looked for in the Italian Alps.

Growth form: Crustose

Substrata: soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

paras Biatora vernalis

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

British Columbia, Clearwater Valley. On decorticated branch of Pinus contorta in open, dry forest 2012-04-04