Scytinium subtile (Schrad.) Otálora, P.M. Jørg. & Wedin

Scytinium subtile (Schrad.) Otálora, P.M. Jørg. & Wedin

Fungal Divers., 64, 1: 291, 2013. Basionym: Lichen subtilis Schrad. - Spicil. Fl. Germ., 1: 95, 1794.

Synonyms: Collema minutissimum Flörke non auct.; Collema subtile (Schrad.) Hoffm.; Leptogium minutissimum (Flörke) Fr. non auct.; Leptogium subtile (Schrad.) Torss.

Distribution: N - Ven (Anzi Lich. Lang. 539: Jørgensen 1994), TAA (Nascimbene 2013, Nascimbene & al. 2022), Lomb (S-L35506), Piem (Isocrono & al. 2004), VA (Piervittori & Isocrono 1999), Emil (Nimis & al. 1996, Fariselli & al. 2020), Lig (GE 160). C - Tosc, Laz (Ravera 2001), Abr (Nimis & Tretiach 1999), Mol (Caporale & al. 2018, Caporale & Ravera 2020), Sar (Zedda 2002).

Description: Thallus small-squamulose to subfoliose, somewhat gelatinous when wet, bluish grey to dark brown, thin, loosely attached, usually forming 0.5-1.5(-2) cm wide patches. Main lobes (0.1-)0.5-1 mm broad, 50-90 µm thick, elongate-subcylindrical, smooth, subdivided into 0.1-0.3 mm wide lobules which are usually stellately arranged around the apothecia. Thallus paraplectenchymatous throughout. Apothecia rare, lecanorine, characteristically globose, sessile, strongly constricted at base, 0.2-0.7(-1) mm across, with an orange-brown, smooth disc and a usually lobulate, paler thalline margin. Proper exciple euparaplectenchymatous but thin, 10-20 µm wide; epithecium brownish; hymenium colourless, 100-170 µm high, I+ blue; paraphyses coherent, mostly simple, c. 1 µm thick at mid-level, the apical cells 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 to muriform, with (3-)5(-7) transverse septa and 1-2 longitudinal septa, hyaline, ellipsoid, thin-walled, (16-)20-30(-35) x (7-)10-14(-17) µm. Photobiont cyanobacterial (Nostoc, the cells in short chains). Spot tests: all negative. Chemistry: without lichen substances.

Note: a mild-temperate lichen found in the basal parts of old trees with a base-rich bark, especially Juglans, Populus and Salix, sometimes on nutrient-enriched wood, more rarely on soil.

Growth form: Squamulose

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

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

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: rare

Submediterranean belt: rather rare

Padanian area: absent

Humid submediterranean belt: rather 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

Curtis Randall Björk – CC BY-SA 4.0

British Columbia, Wells Gray Provincial Park area, Edgewood Research & Education Centre Date: 2011-03-08 On moss at base of Populus trichocarpa in open Betula-Picea-Pinus-Populus forest; photographed from a specimen

Curtis Randall Björk – CC BY-SA 4.0

British Columbia, Clearwater Valley, Dawson Falls Date: 2012-04-08 On wood of Thuja snag in oldgrowth forest, in waterfall sprayzone

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

Herbarium: TSB (24351)
2001/11/26

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1247&lang=en

Belgium

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1247&lang=en

Belgium

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1247&lang=en

Belgium

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1247&lang=en

Belgium

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1247&lang=en

Belgium

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1247&lang=en

Belgium

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1247&lang=en

Belgium

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1247&lang=en

Belgium

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1247&lang=en

Belgium

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1247&lang=en

Belgium

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1247&lang=en

Belgium

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1247&lang=en

Belgium

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1247&lang=en

Belgium

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1247&lang=en

Belgium

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1247&lang=en

Belgium

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