Candelariella lutella (Vain.) Räsänen

Ann. Soc. Scient. Argentina, 128: 57, 1939. Basionym: Lecanora xanthostigma var. lutella Vain. - Meddeland. Soc. Fauna Fl. Fenn., 3: 102, 1878.
Synonyms:
Distribution: N - Frl, Ven, TAA (Nascimbene & al. 2007b, 2014, Nascimbene 2014), Piem (Morisi & Sereno 1995), Emil (Fariselli & al. 2020). C - Marc (Frati & Brunialti 2006), Abr (Nimis & Tretiach 1999, Caporale & al. 2016). S - Bas (Ravera & al. 2015d).
Description: Thallus crustose, greenish yellow to pale yellow, of scattered to crowded, minute areoles or granules, forming (1-)3-5 mm wide patches at the base of small twigs or along cracks in the bark, the areoles flat to slightly convex, rounded to irregular in outline, up to c. 0.4 mm wide. Pseudocortex absent or 1-7 µm thick, of non-gelatinized hyphae with more r less isodiametrical, 3-6 µm wide cells. Apothecia common, lecanorine, 0.15-0.4(-0.6) mm wide, with a deep yellow, flat to convex disc, and a thin, uneven, entire or granular, finally often excluded thalline margin. Thalline exciple with a 5-10 µm thick pseudocortex of non-gelatinized hyphae with more or less isodiametrical, 4-6 µm wide cells; proper exciple mostly indistinct; occasionally to 50 µm thick in uppermost part, of radiating hyphae; epithecium yellow-brown, covered by a granular epipsamma; hymenium colourless, 55-75 µm high; paraphyses simple or sparingly branched in upper part, 1.5-2.5 µm thick at mid-level, with slightly swollen, to 3.5 µm wide apical cells; hypothecium colourless, with oil droplets. Asci 20-32-spored, clavate, with an apical dome which is I+ blue only in the internal, lower part, interrupted in the centre by an I+ paler blue strip, Candelaria-type. Ascospores 1-celled to 1-septate, hyaline, narrowly ellipsoid to oblong, 7-12(-13) x (3-)4-5.5 µm. Photobiont chlorococcoid. Spot tests: thallus and apothecia K- or K+ reddish-orange, C-, KC-, P-. Chemistry: calycin, pulvinic dilactone, vulpinic and pulvinic acids.
Note: a cool-temperate, perhaps holarctic lichen of smooth bark, especially of Alnus; overlooked, or confused with similar species, but certainly not common. It is included in the Italian red list of epiphytic lichens as “Data Deficient” (Nascimbene & al. 2013c).
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

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


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (1660)
2001/11/19


Andres Saag
Estonia


Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_C/Textes_C2/Candelariella_lutella.htm
France, Névache - Hautes-Alpes
7/6/2016


Courtesy: Olivier et Danièle Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_C/Textes_C2/Candelariella_lutella.htm
France, Névache - Hautes-Alpes
7/6/2016