Gyalecta fagicola (Arnold) Kremp.

Denkschr. kgl. bayer. bot. Ges., Abt. 2, 4: 168, 1861. Basionym: Bacidia fagicola Hepp ex Arnold - Flora, 41: 504, 1858.
Synonyms: Gyalecta corticola (Lönnr.) Tuck.; Lecidea congruella Nyl.; Pachyphiale corticola Lönnr.; Pachyphiale fagicola (Arnold) Zwackh
Distribution: N - Frl, TAA (Nascimbene & al. 2014, Nascimbene 2014), Emil (Tretiach & al. 2008, Fariselli & al. 2020). C - Tosc (Benesperi 2007, 2011), Marc (Nimis & Tretiach 1999), Laz (Herb. Ravera 4605), Abr (Nimis & Tretiach 1999), Sar (Zedda 2002, 2002b). S - Camp (Aprile & al. 2003b), Bas (Potenza & al. 2014), Cal (Nimis & Puntillo 2003, Puntillo 2011).
Description: Thallus crustose, episubstratic, granular, pale grey to pinkish grey. Apothecia urceolate, 0.3-0.5 mm across, gelatinous and translucent when wet, with a concave, reddish brown, usually epruinose disc, and a thick, usually smooth proper margin. Proper exciple well-developed, of thin, compacted hyphae, reddish brown in outer part, colourless within; epithecium reddish brown; hymenium colourless, I+ pale blue; paraphyses mostly simple, thread-like, septate with more or less hooked tips; hypothecium colourless. Asci 16-32-spored, subclavate, thin-walled, the wall K/I+ blue, not or only slightly thickened at apex, without an internal apparatus. Ascospores 3-7-septate, hyaline, narrowly fusiform, 15-35 x 3-5 µm. Photobiont trentepohlioid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: often confused with G. carneola, but certainly rare throughout the country, with optimum in open deciduous forests or, in humid areas, also on isolated, old trees. The species is included in the Italian red list of epiphytic lichens under the “Least Concern” category (Nascimbene & al. 2013c).
Growth form: Crustose
Substrata: bark
Photobiont: Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Commonnes-rarity: (info)

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

pH of the substrata:

12345

Solar irradiation:

12345

Aridity:

12345

Eutrophication:

12345

Poleotolerance:

0123

Altitudinal distribution:

123456


Predictive model
Herbarium samples


Curtis Randall Björk CC BY-SA 4.0
British Columbia, Peace Lowlands Date: July, 2008 Photographed from specimen (Björk 16240, UBC), on bark of old Populus in riparian forest



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34825)
2002/02/12



Curtis Randall Björk – CC BY-SA 4.0
British Columbia, Peace Lowlands Date: July, 2008 Photographed from specimen (Björk 16240, UBC), on bark of old Populus in riparian forest


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/


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalecta_fagicola.htm
France, Sur Acer pseudoplatanus - alt. 660 m - Haute-Loire - (43) - leg. Arnaud Descheemacker, dét. O et D. Gonnet
29/8/2017


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalecta_fagicola.htm
France, Sur Acer pseudoplatanus - alt. 660 m - Haute-Loire - (43) - leg. Arnaud Descheemacker, dét. O et D. Gonnet
29/8/2017


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalecta_fagicola.htm
France, Sur Acer pseudoplatanus - alt. 660 m - Haute-Loire - (43) - leg. Arnaud Descheemacker, dét. O et D. Gonnet
29/8/2017


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalecta_fagicola.htm
France, Sur Acer pseudoplatanus - alt. 660 m - Haute-Loire - (43) - leg. Arnaud Descheemacker, dét. O et D. Gonnet
29/8/2017


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalecta_fagicola.htm
France, Sur Acer pseudoplatanus - alt. 660 m - Haute-Loire - (43) - leg. Arnaud Descheemacker, dét. O et D. Gonnet
29/8/2017