Acarospora glaucocarpa (Ach.) Körb.

Parerga Lichenol., 1: 57, 1859. Basionym: Parmelia glaucocarpa Ach. - Meth. Lich.: 182, 1803.
Synonyms: Acarospora castanea (DC.) Körb.; Acarospora cervina var. glaucocarpa (Ach.) Körb.; Acarospora theobromina Hue p.p.; Urceolaria castanea DC.
Distribution: N - Frl (TSB 4597), Ven (Nascimbene & Caniglia 2003c, Nascimbene 2005c, 2008c), TAA (Nascimbene 2003, 2008b, Nascimbene 2005b, Nascimbene & al. 2005, 2006, Spitale & Nascimbene 2012), Lomb, Piem (Isocrono & al. 2003, Isocrono & Piervittori 2008), Lig. C - Tosc, Marc, Umb (Ravera & al. 2006), Abr (Gheza & al. 2021), Mol (Nimis & Tretiach 2004, Caporale & al. 2008), Sar. S - Camp (Altieri & al. 2000, Roccardi & Ricci 2006, Garofalo & al. 2010), Pugl, Bas (TSB 22126), Cal (Puntillo 2011), Si (Grillo & Caniglia 2004).
Description: Thallus crustose, episubstratic, areolate-subsquamulose, often forming extensive patches. Areoles contiguous or more or less overlapping, 0.5-4 mm wide, rather thick, rounded or angular to slightly lobed, flat to convex, epruinose, smooth to slightly roughened, pale to medium brown or olive-brown, with a paler but epruinose margin, matt, the underside whitish. Algal layer 90-200 μm thick, irregular, discontinuous, penetrating the medulla in tooth-like columns; medulla greyish, filled by masses of crystals. Apothecia 0.5-3 mm across, immersed, 1(-2) per areole, with a reddish brown, pruinose, smooth disc and a thin, prominent, sometimes pruinose thalline margin. Epithecium brown, with crystals; hymenium colourless, 60-100 μm tall, I+ blue; paraphyses 2-3 μm thick at base, to 7 μm at apex, with a brown cap; hypothecium colourless, 30-50 μm tall. Asci 100-200-spored, clavate, the apical dome K/I-. Ascospores 1-celled, hyaline, cylindrical, 4-6(-8) x (1.5-)2-3(-4) μm. Photobiont chlorococcoid. Spot tests: thallus and medulla K-, C-, KC-, P-, UV-. Chemistry: no lichen substances.
Note: a widespread, probably holarctic species found on the top of more or less calcareous boulders in natural habitats, sometimes overgrowing other crustose lichens, with a wide altitudinal range but most common in upland areas; closely related to A. cervina, perhaps more frequent in less exposed situations. See also note on A. cervina.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rare
Subalpine belt: rather rare
Oromediterranean belt: common
Montane belt: very common
Submediterranean belt: rather common
Padanian area: extremely rare
Humid submediterranean belt: rare
Humid mediterranean belt: very rare
Dry mediterranean belt: very 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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Pier Luigi Nimis CC BY-SA 4.0
TSB 41609



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (35702)
2003/01/22
apothecia



Juri Nascimbene - CC BY-SA 4.0
Dolomiti Ampezzane, Region of Veneto, Italy
2005



Juri Nascimbene - CC BY-SA 4.0
Dolomiti Ampezzane, Region of Veneto, Italy
2005


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


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



Pier Luigi Nimis CC BY-SA 4.0
TSB 41609


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



Pier Luigi Nimis CC BY-SA 4.0
TSB 41609



Pier Luigi Nimis CC BY-SA 4.0
TSB 41609


Magnusson A. H. (1935) Acarosporaceae, Thelocarpaceae. - In: Rabenhorst G. L.: Kryptogamen-Flora von Deutschland, Österreich, und der Schweiz-. 2nd- IX. Die Flechten. Abt. 5- 1. Gebr. Borntraeger. Leipzig, pp. 1-318. – Public Domain