Myriolecis sambuci (Pers.) Clem.

Gen. Fung.: 79, 1909. Basionym: Lichen sambuci Pers. - Ann. Bot. (Usteri), 7: 26, 1794.
Synonyms: Lecanora sambuci (Pers.) Nyl.; Lecanora sambucioides H. Magn.
Distribution: N - VG, Ven (Nascimbene & Marini 2010), TAA (Nascimbene & al. 2007b), Piem (Piervittori 2003, Isocrono & al. 2004), Emil (Bassi 1995, Fariselli & al. 2020), Lig. C - Tosc (Loppi & Putortì 1995b), Marc (Frati & al. 2004), Umb (Genovesi & al. 2001, Ravera & al. 2006), Abr (Nimis & Tretiach 1999), Mol (Nimis & Tretiach 1999, Caporale & al. 2008, Genovesi & Ravera 2014), Sar (Zedda 2002, Rizzi & al. 2011). S - Camp (Aprile & al. 2003b, Garofalo & al. 2010, Catalano & al. 2012, 2016), Pugl (Nimis & Tretiach 1999), Bas (Nimis & Tretiach 1999, Brackel 2011), Cal (Puntillo 1996), Si.
Description: Thallus crustose, endosubstratic or very thinly episubstratic, continuous or minutely granulose, white ot whitish grey. Apothecia lecanorine, sessile, 0.2-0.6(-0.8) mm across, with a grey-brown to reddish brown, flat to slightly convex, sometimes slightly pruinose disc, and a white-pruinose, prominent, usually smooth or irregularly crenulate thalline margin. Thalline exciple with an indistinctly delimited cortex, filled with small crystals insoluble in K, but soluble in N; epithecium yellowish brown, rarely with a few superficial granules; hymenium colourless, 40-70 µm high; paraphyses simple, thick, capitate, brown-pigmented at tips, usually free in K; hypothecium colourless. Asci (8-)16-32-spored, clavate, very thin-walled, with a K/I+ blue, tall tholus penetrated by a faintly amyloid apical cushion, the wall K/I-, surrounded by a blue outer layer, Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, (6-)8-10(-12) x (3-)4-6(-7.5) µm. Pycnidia frequent, black, erumpent. Conidia 10-12 x c. 1 µm, straight or curved. Photobiont chlorococcoid. Spot tests: thallus and apothecial margin K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a mainly mild-temperate species found on base-rich bark, especially on Sambucus and Populus.
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: very rare
Submediterranean belt: rather rare
Padanian area: extremely rare
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


P.L. Nimis CC BY-SA 4.0
TSB 17387



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11237)
2001/12/08


Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php . Courtesy: A. Stridvall


Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php . Courtesy: A. Stridvall



Domenico Puntillo; Owner: Domenico Puntillo
Italy



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (17387)
2001/11/26


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/