ITALIC 8.0

Scytinium imbricatum (P.M. Jørg.) Otálora, P.M. Jørg. & Wedin

Fungal Divers., 64, 1: 290, 2013. Basionym: Leptogium imbricatum P.M. Jørg. - Lichenologist, 26: 7, 1994.

Synonyms:

Distribution: N - Ven (Nascimbene & al. 2021), TAA (Nascimbene & al. 2021, 2022), Piem (TSB 34145). C - Abr (Gheza & al. 2021, Di Nuzzo & al. 2021, Vallese & al. 2022)

Description: Thallus minutely squamulose, subgelatinous when wet, of ascending to erect, densely crowded, usually imbricate, dark brown to blue-grey 0.2-0.5(-1) mm wide, 50-85 μm thick, smooth squamules with indented to incised margins, forming dense, up to 3 cm wide cushions; lower surface blue-grey, with sparse tufts of long-celled, whitish hapters. Thallus paraplectenchymatous throughout. Apothecia very rare, lecanorine, sessile and constricted at base, up to 1 mm across, with a concave to slightly convex, brown disc, a soon excluded thalline margin, and a usually paler proper margin. Proper exciple distinctly cellular; epithecium brownish; hymenium and hypothecium colourless; paraphyses coherent, mostly simple, the apical cells slightly swollen. Asci 8-spored, narrowly clavate, the apex strongly thickened, the apical dome K/I+ pale blue, with a downwardly projecting K/I+ deep blue tubular structure. Ascospores muriform, hyaline, ellipsoid, 20-35 x 7-15 μm. Photobiont cyanobacterial (Nostoc, the cells in clusters or in short chains). Spot test: all negative. Chemistry: without lichen substances.

Note: on more or less calciferous ground in alpine grasslands; likely to occur throughout the Italian Alps, but formerly filed under pulvinate forms of S. gelatinosum and S. lichenoides . For further details see Bertrand & al. (2022).

Growth form: Squamulose

Substrata: soil, terricolous mosses, and plant debris

Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rare

Subalpine belt: rather rare

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

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

Felix Schumm - CC BY-SA 4.0

[19712], Venezuela, Merida, District Rivas Davila, Paramo la Negra, ca. 20 km W of Bailadores, on the ground on plant debris, 2750 m, 8°15' N, 71°50' W. Leg. K. & A. Kalb, 12.8.1989, det. A. Aptroot. KALB: LICHENES NEOTROPICI NR. 647

Felix Schumm - CC BY-SA 4.0

[19712], Venezuela, Merida, District Rivas Davila, Paramo la Negra, ca. 20 km W of Bailadores, on the ground on plant debris, 2750 m, 8°15' N, 71°50' W. Leg. K. & A. Kalb, 12.8.1989, det. A. Aptroot. KALB: LICHENES NEOTROPICI NR. 647

Felix Schumm - CC BY-SA 4.0

[19712], Venezuela, Merida, District Rivas Davila, Paramo la Negra, ca. 20 km W of Bailadores, on the ground on plant debris, 2750 m, 8°15' N, 71°50' W. Leg. K. & A. Kalb, 12.8.1989, det. A. Aptroot. KALB: LICHENES NEOTROPICI NR. 647

Felix Schumm - CC BY-SA 4.0

[19712], Venezuela, Merida, District Rivas Davila, Paramo la Negra, ca. 20 km W of Bailadores, on the ground on plant debris, 2750 m, 8°15' N, 71°50' W. Leg. K. & A. Kalb, 12.8.1989, det. A. Aptroot. KALB: LICHENES NEOTROPICI NR. 647