Calicium glaucellum Ach.

Meth. Lich.: 97, 1803.
Synonyms: Calicium discoidale Ach.
Distribution: N - Frl (Puntillo & Puntillo 2009), Ven (Nascimbene 2008c), TAA (Nascimbene 2008b, 2013, Nascimbene & al. 2009, 2010, 2022, Nimis & al. 2015), Emil (Benesperi 2009, Fariselli & al. 2020), Lig (Herb. von Brackel 22). C - Tosc (Benesperi 2007, Puntillo & Puntillo 2009), Marc (Nimis & Tretiach 1999, Umb (Ravera 1998, Ravera & al. 2006, Puntillo & Puntillo 2009), Laz (Ravera 2001, Puntillo & Puntillo 2009), Abr (Puntillo & Puntillo 2009), Sar (Zedda 2002, 2002b, Puntillo & Puntillo 2009, Cossu 2013). S - Camp (Puntillo & Puntillo 2009), Cal (Puntillo 1994, 1996, Puntillo & Puntillo 2009).
Description: Thallus crustose, thin, endosubstratic and poorly evident or rarely thinly episubstratic and granular-verrucose, dark grey-green. Apothecia stalked, pin-like, black with a thin whitish pruina which is most abundant at the edge and on the lower side of capitulum, or more rarely epruinose. Stalk shiny black, sometimes white-pruinose in the uppermost part, 0.5-0.9 mm high, 0.1-0.2 mm thick, of strongly sclerotized, dark brown to dark aeruginose, irregularly interwoven hyphae, the outer layer covered with a thin, transparent gelatinous sheath. Capitulum lenticular to obovoid, 0.2-0.35 mm across, with a well-developed, cup-shaped exciple formed by dark brown to aeruginose, elongated to almost isodiametric, anticlinally arranged, sclerotized hyphae which are paler close to the surface; mazaedium well developed, black; hypothecium dark, with a flat or slightly convex upper surface. Asci cylindrical, formed singly, dissolving early, with uniseriate ascospores. Ascospores 1-septate, dark brown, ellipsoid, 9-13 x 5-7 µm, with a thick, ornamented wall; young spores with mainly longitudinally arranged ridges, mature spores with irregular cracks and short ridge fragments. Photobiont chlorococcoid. Spot tests: thallus K- or K+ dull yellow, C-, KC-, P-; ascomata I- in all parts. Chemistry: thallus with sekikaic acid (major) and related compounds.
Note: a temperate to boreal-montane, holarctic species found on lignum and on acid bark, especially on decorticated stumps of conifers, but also on broad-leaved trees, e.g. on Castanea, widespread throughout Italy.
Growth form: Crustose
Substrata: bark and lignum
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
In underhangs rarely wetted by rain

Commonnes-rarity: (info)

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

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


Domenico Puntillo CC BY-SA 4.0



Juri Nascimbene - CC BY-SA 4.0
Paneveggio, Reg. Trentino-Alto Adige Prov. Trento, Italy.



Juri Nascimbene - CC BY-SA 4.0
Paneveggio, Reg. Trentino-Alto Adige Prov. Trento, Italy.
2009


Leif Stridvall - Source: http://www.stridvall.se/lichens/gallery/
Courtesy: Anita Stridvall


Leif Stridvall - Source: http://www.stridvall.se/lichens/gallery/
Courtesy: Anita Stridvall



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11888)
2001/12/05



Domenico Puntillo - CC BY-SA 4.0
Italy, Calabria



Pier Luigi Nimis - CC BY-SA 4.0
TSB 41541



Pier Luigi Nimis - CC BY-SA 4.0
TSB 41543



Pier Luigi Nimis - CC BY-SA 4.0
TSB 41542



Pier Luigi Nimis - CC BY-SA 4.0
TSB 41543



Pier Luigi Nimis - CC BY-SA 4.0
TSB 41543



Pier Luigi Nimis - CC BY-SA 4.0
TSB 41543


Andres Saag; Owner: University of Tartu


Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_C/Textes_C3/Calicium_glaucellum.htm
France, 22/8/2016 - session AFL dans le Jura


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe; Germany; Rheinland-Pfalz: Hunsrück.