ITALIC 8.0

Buellia griseosquamulata Scheid.

Lichenologist, 25: 25, 1993.

Synonyms:

Distribution: C - Sar (Scheidegger 1993).

Description: Thallus crustose, episubstratic, areolate-subsquamulose, grey, developing on the thalli of Buellia tyrolensis. Medulla white, I-. Apothecia lecideine, black, 0.3-0.5 mm across, sessile but not constricted at base, with a flat, epruinose disc, and a thin, prominent proper margin. Proper exciple 18-25 µm wide, Aethalea-type, the inner hyphae hyaline, prosoplectenchymatous, the outer hyphae parallel and usually strongly brown-pigmented, N-; epithecium brown; hymenium colourless, c. 55 µm high, without oil droplets; hypothecium dark brown, c. 100 µm high. Asci 8-spored, clavate to cylindrical-clavate, the apical dome K/I+ dark blue with a pale, conical-pointed apical cushion (axial mass), the wall I-, but the thin outer gel I+ blue, Bacidia-type. Ascospores 1-septate, not constricted at septum, brown, broadly oblong, 9.5-11 x 5-9 µm, Physconia-type, smooth-walled. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: hitherto known only from the type collection, on granite near the coast.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

paras Buellia tirolensis

Taxon bound to maritime-coastal situations

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: extremely rare

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

Source: Scheidegger C. 1993. A revision of European saxicolous species of the genus Buellia De Not. and formerly included taxa. Lichenologist, 25, 4: 315-364.

FIG. 1. Buellia griseosquamulata (above) growing as a lichenicolous lichen on B. tirolensis (below). Scale =1 mm.