Scytinium plicatile (Ach.) Otálora, P.M. Jørg. & Wedin

Fungal Divers., 64, 1: 291, 2013. Basionym: Lichen plicatilis Ach. - K. Vetensk.-Akad. Nya Handl., 16: 11, 1795.
Synonyms: Collema hydrocharum (Ach.) Ach.; Collema plicatile (Ach.) Ach.; Collemodium plicatile (Ach.) Nyl.; Leptogium cataclystum (Körb.) Harm.; Leptogium cataclystum var. fluctuans (Kremp.) Zahlbr.; Leptogium firmum Nyl.; Leptogium hydrocharum (Ach.) Zahlbr.; Leptogium plicatile (Ach.) Leight.; Leptogium plicatile f. subplicatile Hue
Distribution: N - VG, Frl (Tretiach & Molaro 2007), Ven (Nascimbene & Caniglia 2003c), TAA, Lomb, Piem (Isocrono & al. 2004), VA (Matteucci & al. 2013), Emil (Fariselli & al. 2020), Lig (Watson 2014). C - Tosc (Ravera & al. 2024a), Marc, Umb (Genovesi & Ravera 2001, Ravera & al. 2006), Abr (Nimis & Tretiach 1999), Mol (Nimis & Tretiach 1999, Caporale & al. 2008), Sar. S - Camp (Nimis & Tretiach 2004), Pugl (Nimis & Tretiach 1999), Bas (Potenza & al. 2014), Cal (Puntillo & Puntillo 2004), Si (Nimis & al. 1996b).
Description: Thallus subfoliose to squamulose, gelatinous when wet, rigid when dry, forming firmly attached, irregular,1-5 cm wide, irregular rosettes. Lobes rounded, 150-350 µm thick, strongly swelling when wet, 1-3 mm wide, with ascending, twisted, often divided and pleated margins, dark brown-black with a reddish or olive tinge, uneven, matt, often ridged, sometimes with coarse, clustered, isidia-like warts. Lower surface paler brown, wrinkled, with scattered tufts of white hapters. Upper and lower cortices poorly developed, consisting of an up to 4 µm thick, single layer of irregularly isodiametrical cells, the layer inbetween with loosely interwoven chains of Nostoc and hyphae. Apothecia lecanorine, laminal to marginal, sessile, 0.5-1.5 mm wide, with a brown, concave to flat disc and an entire, raised thalline margin. Proper exciple euparaplectenchymatous, 55-90 µm wide laterally; epithecium brownish; hymenium colourless, 135-160 µm high, I+ blue; paraphyses mostly simple, c. 1 µm thick at mid-level, the apical cells slightly swollen; hypothecium colourless to pale yellow, 50-60 µm high. 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 3 transverse septa and 1 longitudinal septum, hyaline, ellipsoid to subfusiform, (18-)20-28(-35) x (7-)8-16 µm. Photobiont cyanobacterial (Nostoc, the cells in short chains). Spot test: all negative. Chemistry: without lichen substances.
Note: a mainly mild-temperate to Mediterranean lichen found on steeply inclined, but not fully sun-exposed seepage tracks of more or less calcareous rocks.
Growth form: Foliose, narrow lobed
Substrata: rocks
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly sexual
On otherwise dry surfaces with short periods of water seepage after rain

Commonnes-rarity: (info)

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


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (33057)
2001/12/08



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (33057)
2001/12/08
isidia



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5800)
2001/11/26
shade-form



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



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



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



Curtis Randall Björk – CC BY-SA 4.0
British Columbia, Clearwater Valley Date: 2012-04-02 On siliceous rock calc-modified by seepage, in open forest


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


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


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


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