ITALIC 8.0

Bacidina subfuscula (Nyl.) S. Ekman

Nordic J. Bot.: e03846, 39, 2023. Basionym: Lecidea subfuscula Nyl. - Flora, 48: 604, 1865.

Synonyms: Bacidia subfuscula (Nyl.) Th. Fr.; Lecania subfuscula (Nyl.) S. Ekman

Distribution: N - Ven (Nascimbene 2002, 2003b, Tomaselli & al. 2006, Nascimbene 2008), TAA (Herb. Nascimbene 7779).

Description: Thallus crustose, very variable, from immersed or filmy to (usually) granular-warted, greenish white to pale brown. Apothecia biatorine, crowded into clusters, 0.2-0.6 mm across, with an initially flat, but soon becoming convex, grey-brown pinkish brown to black disc, and a thin, usually paler proper margin. Proper exciple brown and K+ purple along the upper outer edge and at the top, otherwise colourless, of radially arranged, cellular hyphae; epithecium colourless to olivaceous grey or violet-brown, N+ red, K+ purple when strongly pigmented; hymenium colourless or with brownish vertical strikes in upper part, 40-50(-65) μm high; paraphyses rather lax, 1.5-2 µm thick, the apical cells swollen, up to 5 µm wide, usually brown-pigmented; hypothecium colourless or yellowish, the pigmented parts K+ pale yellow. Asci 8-spored, clavate to cylindrical-clavate, the apical dome K/I+ dark blue with a pale, conical-pointed apical cushion (axial mass) never penetrating through the entire d-layer, the wall K/I-, but the thin outer gel K/I+ blue, Bacidia-type. Ascospores 3(-5)-septate, hyaline, bacilliform, 14-28 x 2-3 µm. Pycnidia immersed, with a colourless wall. Conidia partly curved, 30-55 x 1-1.5 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: thallus without lichen substances.

Note: a bipolar species growing on more or less calciferous soil, terricolous mosses and plant debris, rarely on calciferous rocks, usually above the montane belt. The specimen from Veneto corresponds well to the description (vidi!).

Growth form: Crustose

Substrata: soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: very rare

Subalpine belt: very rare

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

Herbarium samples

Index Fungorum GBIF

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