Gyalolechia fulgens (Sw.) Søchting, Frödén & Arup

in Arup & al., Nord. J. Bot., 31: 70, 2013. Basionym: Lichen fulgens Sw. - N. Acta Acad. Upsal., 4: 246, 1784.
Synonyms: Caloplaca fulgens (Sw.) Körb.; Fulgensia fulgens (Sw.) Elenkin; Fulgensia vulgaris A. Massal. & De Not.; Lecanora fulgens (Sw.) Ach.; Placodium fulgens (Sw.) DC.; Psoroma fulgens (Sw.) A. Massal.; Squamaria fulgens (Sw.) Hook.; Squamaria fulgens var. decipiens Anzi
Distribution: N - VG, Ven (Lazzarin 2000b), TAA (De Benetti & Caniglia 1993), Lomb, Piem (Clerc & al. 1999, Isocrono & al. 2003, Morisi 2005, Gheza 2020), VA (Piervittori & Isocrono 1999), Emil (Nimis & al. 1996, Fariselli & al. 2020), Lig (Brunialti & al. 1999, Giordani & al. 2016). C - Tosc (Loppi & al. 1998, 2004b, Benesperi 2006, Pasquinelli & Puccini 2010), Marc (Nimis & Tretiach 1999), Umb (Genovesi & al. 2001, Ravera & al. 2006, Panfili 2007), Laz (Brackel 2015), Abr (Nimis & Tretiach 1999, Gheza & al. 2021), Mol (Nimis & Tretiach 1999, Caporale & al. 2008, Brackel 2020). S - Camp (Garofalo & al. 1999, Aprile & al. 2002, 2003, 2003b, Nimis & Tretiach 2004, Garofalo & al. 2010), Pugl, Bas (Potenza & Fascetti 2005, 2012, Potenza & al. 2010, Brackel 2011, Gianfreda & Matino 2020), Cal (Puntillo 1996), Si (Grillo 1998, Grillo & Caniglia 2004, Cataldo & Minissale 2013).
Description: Thallus crustose-placodioid, pale yellow to orange-yellow, sometimes yellowish-white-pruinose, forming orbicular rosettes to 3-4 cm diam., with a verrucose-areolate centre and radiating marginal lobes. Lobes 1-2(-3) mm broad, flattened, contiguous to separate at margin, fused together towards the centre. Apothecia frequent, lecanorine, rounded, sessile, 0.5-2(-3) mm diam., with an orange to brownish orange, concave to flat, smooth disc, and a thin, orange-yellow margin. Epithecium orange-yellow, K+ red; hymenium and hypothecium colourlesss. Asci 8-spored, clavate, bitunicate, thickened at apex with a broad internal beak, I+ blue in the outer part of the apex, Teloschistes-type. Ascospores 1-celled, rarely 1-septate, hyaline, thin-walled, of different forms within the same apothecium (from ovoid to slightly pyriform), 7-16 x 3.5-5 µm. Pycnidia orange-yellow, immersed. Conidia bacilliform. Photobiont chlorococcoid. Spot tests: thallus and apothecia K+ red, C-, KC-, P-, UV+ pale orange. Chemistry: thallus and apothecia with fragilin (major), emodin, parietin and other anthraquinones (minor).
Note: a subtropical to temperate lichen found on calcareous rocks and thin layers of soil, often in rock fissures below the subalpine belt.
Growth form: Crustose placodiomorph
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Subcontinental: restricted to areas with a dry-subcontinental climate (e.g. dry Alpine valleys, parts of Mediterranean Italy)

Commonnes-rarity: (info)

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

Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php (Courtesy: Anita Stridvall)



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5085)
2001/11/24


Triin Aimla; Owner: University of Tartu
originally as Fulgensia fulgens



Pier Luigi Nimis - CC BY-SA 4.0
TSB 37299



Pier Luigi Nimis - CC BY-SA 4.0
TSB 37299



P.L. Nimis CC BY-SA 04
TSB 41231



P.L. Nimis CC BY-SA 04
TSB 41231


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalolechia_fulgens.htm
France, au niveau du sol - Session AFL 2008 - Lozère


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalolechia_fulgens.htm
France, près de Rocamadour, alt. 250 m - Lot
21/5/2015


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalolechia_fulgens.htm
France, près de Rocamadour, alt. 250 m - Lot
21/5/2015