Scytinium teretiusculum (Wallr.) Otálora, P.M. Jørg. & Wedin

Fungal Divers., 64, 1: 291, 2013. Basionym: Parmelia teretiuscula Wallr. - Fl. Crypt. Germ., 3: 551, 1831.
Synonyms: Garovaglina microscopica (Nyl.) Trevis.; Homodium microscopicum (Nyl.) Boistel; Leptogium microscopicum Nyl.; Leptogium teretiusculum (Wallr.) Arnold
Distribution: N - Lig (Giordani & al. 2002, Brunialti & Giordani 2003). C - Tosc (Ravera & al. 2019a), Marc (Nimis & Tretiach 1999, Frati & al. 2004, Frati & Brunialti 2006), Umb (Ravera 2000, Ravera & al. 2006, Panfili 2007), Laz (Nimis & Tretiach 2004, Brackel 2015), Abr (Nimis & Tretiach 1999, Caporale & al. 2016, Vallese & al. 2022), Mol (Paoli & al. 2015, Caporale & Ravera 2020), Sar (Zedda 2002 Zedda & al. 2010, Rizzi & al. 2011, Cogoni & al. 2011, Di Nuzzo & al. 2022). S - Camp (Brackel 2021), Pugl (Nimis & Tretiach 1999), Bas (Bartoli & Puntillo 1998), Cal (Puntillo 1996, Puntillo & Puntillo 2004), Si (Grillo 1998, Grillo & Caniglia 2004, Caniglia & Grillo 2006b, Liistro & Cataldo 2011).
Description: Thallus squamulose to dwarf-fruticose, olive-brown to brown-black, subgelatinous when wet, at first consisting of slightly flattened squamules which soon bear many small, cylindrical, isidia-like lobules developing into terete, 0.1-0.2 mm wide, 0.3-1 mm long, up to 150(-200) µm thick, coralloid branches forming minute, 1-2 cm wide cushions. Upper and lower cortex consisting of irregularly isodiametrical cells, the layer inbetween paraplectenchymatous throughout. Apothecia very rare, lecanorine, laminal on squamules or terminal on branches, stipitate, 0.2-1(-1.5) mm across, with a red-brown, concave to flat disc, and an entire to isidiate thalline margin. Epithecium brownish; hymenium colourless, 90-100 µm high; paraphyses coherent, mostly simple, c. 1.5 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, with (1-)3-5-transverse septa and 1 longitudinal septum, ellipsoid to subfusiform, 20-31 x 10-12 µm. Photobiont cyanobacterial (Nostoc, the cells in clusters or in short chains). Spot tests: all negative. Chemistry: without lichen substances.
Note: a mainly temperate, perhaps holarctic lichen found on basal parts of old trees, sometimes also directly on soil or on weathered rocks; certainly present in the Alps, and to be looked for there.
Growth form: Squamulose
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly asexual, by isidia, or isidia-like structures (e.g. schizidia)

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: rare
Padanian area: absent
Humid submediterranean belt: rather rare
Humid mediterranean belt: very rare
Dry mediterranean belt: extremely rare

pH of the substrata:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples
Index Fungorum GBIF


E. Pittao CC BY-SA 04
TSB 5507



E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5507)
2008.04.01



E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (10577)
2008.04.01



E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (30105)
2008.04.01



E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (16345)
2008.04.01



E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (8845)
2008.04.01



Andrea Moro; Owner: Department of Life Sciences, University of Triedte
Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Rocca di Monrupino
20/02/2017



Felix Schumm – CC BY-SA 4.0
[ABL-69714], Madeira, Funchal, Palheiro (Blandy) Gardens, on basalt. 36°15’ N, 3°25’ E, 450 m alt.. Leg et det. Aptroot 06.06.2011



Felix Schumm – CC BY-SA 4.0
[ABL-69714], Madeira, Funchal, Palheiro (Blandy) Gardens, on basalt. 36°15’ N, 3°25’ E, 450 m alt.. Leg et det. Aptroot 06.06.2011



Felix Schumm – CC BY-SA 4.0
[ABL-69714], Madeira, Funchal, Palheiro (Blandy) Gardens, on basalt. 36°15’ N, 3°25’ E, 450 m alt.. Leg et det. Aptroot 06.06.2011



Felix Schumm – CC BY-SA 4.0
[ABL-69714], Madeira, Funchal, Palheiro (Blandy) Gardens, on basalt. 36°15’ N, 3°25’ E, 450 m alt.. Leg et det. Aptroot 06.06.2011



Felix Schumm – CC BY-SA 4.0
[ABL-69714], Madeira, Funchal, Palheiro (Blandy) Gardens, on basalt. 36°15’ N, 3°25’ E, 450 m alt.. Leg et det. Aptroot 06.06.2011



Felix Schumm – CC BY-SA 4.0
[ABL-69714], Madeira, Funchal, Palheiro (Blandy) Gardens, on basalt. 36°15’ N, 3°25’ E, 450 m alt.. Leg et det. Aptroot 06.06.2011



E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5507)
2008.04.01



E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5507)
2008.04.01


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1343&lang=en
France, Lesteven


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1343&lang=en
France, Lesteven


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1343&lang=en
France, Lesteven


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1343&lang=en
France, Roscanvel


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1343&lang=en
France, Roscanvel


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1343&lang=en
France, Stangala


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1343&lang=en
France, Stangala


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1343&lang=en
France, Stangala


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe; Germany: Hesse. (Ident. by Eichler/Cezanne).