ITALIC 8.0

Scytinium intermedium (Arnold) Otálora, P.M. Jørg. & Wedin

Fungal Divers., 64, 1: 290, 2013. Basionym: Leptogium minutissimum var. intermedium Arnold - Flora, 50: 122, 1867.

Synonyms: Leptogium intermedium (Arnold) Arnold; Leptogium minutissimum auct. non (Flörke) Fr.

Distribution: N - Frl (TSB 15419), Ven (Thor & Nascimbene 2007), TAA (Nascimbene & al. 2007b), Lomb (Jørgensen 1994, Otálora & al. 2008), Piem (Isocrono & al. 2004, Otálora & al. 2008). C - Tosc (Otálora & al. 2008), Umb (Ravera & al. 2006, 2006b), Laz (Herb. Ravera 4886), Sar. S - Camp, Si.

Description: Thallus squamulose, slightly gelatinous when wet, bluish grey to dark brown, often paler in the basal, less exposed parts, 50-100 µm thick, loosely attached, forming up to 3 cm wide patches. Squamules smooth to slightly wrinkled, (0.2-)0.5-1 mm broad, elongate, ascending, contiguous to imbricate, with a usually down-turned, entire or shallowly incised margin; lower surface paler blue-grey, with scattered tufts of white hapters. Upper and lower cortex of a single layer of angular, more or less isodiametrical cells, the layer inbetween well-separated from cortex, largely cellular, with densely packed, elongate hyphae and loosely arranged chains of Nostoc. Apothecia lecanorine, sessile, strongly constricted at base, up to 0.5 mm across, with a brown, concave, smooth disc and a 0.4-0.6 mm thick thalline margin. Proper exciple euparaplectenchymatous; epithecium pale brown; hymenium colourless, I+ blue; paraphyses coherent, mostly simple, the apices slightly swollen; hypothecium colourless. 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 submuriform, hyaline, broadly ellipsoid, 20-35 x 8-13 µm. Photobiont cyanobacterial (Nostoc, the cells in short chains). Spot tests: all negative. Chemistry: without lichen substances.

Note: a mainly temperate species found on soil, occasionally on the mossy bases of ancient trunks, more rarely on calcareous rocks.

Growth form: Squamulose

Substrata: bark, soil, terricolous mosses, and plant debris

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

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: extremely rare

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: very rare

Padanian area: absent

Humid submediterranean belt: very rare

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

P.L. Nimis CC BY-SA 04

TSB 41638

Curtis Randall Björk – CC BY-SA 4.0

British Columbia, Cariboo Region, Marble Range Date: 2014-06-04 Terricolous on limestone ridge

Pier Luigi Nimis CC BY-SA 4.0

TSB 41638

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (17844)
2003/03/06

Pier Luigi Nimis CC BY-SA 4.0

TSB 41638