ITALIC 7.0

Halecania spodomela (Nyl.) M. Mayrhofer

Herzogia, 7: 402, 1987. Basionym: Lecanora spodomela Nyl. - Flora, 59: 572, 1876.

Synonyms: Lecania spodomela (Nyl.) A.L. Sm.; Lecidea nigrificans Nyl.

Distribution: N - Piem.

Description: Thallus crustose, episubstratic, grey-white but often appearing black due to a covering of cyanobacteria, consisting of a few scattered granules, always parasitic on cyanobacterial lichens, especially Placynthium-species. Apothecia lecanorine, sessile, 0.1-0.6 mm across, with a flat to convex, black disc, a thin, entire, often finally excluded thalline margin, and a more or less evident parathecial ring. Thalline exciple indistinctly corticated, with many algae in the medulla; proper exciple paraplectenchymatous, dark brown in outer part, paler within, N-; epithecium mottled green to green-black, K-, N+ red; hymenium colourless, 65-85 µm high, I+ blue; paraphyses coherent, sparingly branched in upper part, the apical cells hardly swollen, only a few with a dark cap; hypothecium colourless. Asci 8-spored, clavate to subcylindrical, with a K/I+ blue outer coat and a K/I+ uniformly blue apical dome, Catillaria-type. Ascospores 1-septate, hyaline, ellipsoid, 10-15 x 5-7.5 µm, including the gelatinous perispore. Pycnidial wall green in upper part, N+ red. Conidia hyaline, bacilliform. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a species resembling H. alpivaga, but with a strongly reduced thallus and smaller apothecia, found on siliceous rocks, usually growing on Placynthium; in western Europe it is mainly coastal, and the central and eastern European historical records are in need of critical re-evaluation.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: extremely rare

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

http://fungi.myspecies.info/all-fungi/halecania-spodomela CC BY-NC

Source: http://fungi.myspecies.info/all-fungi/halecania-spodomela - CC BY-NC