Polyozosia antiqua (J.R. Laundon) S.Y. Kondr., Lőkös & Farkas

in Kondratyuk & al., Acta Bot. Hung., 62, 1-2: 101, 2020. Basionym: Lecanora antiqua J.R. Laundon - Lichenologist, 42: 631, 2010.
Synonyms: Lecanora conferta auct. non (Duby) Grognot; Lecanora conferta f. terricola H. Olivier; Myriolecis antiqua (J.R. Laundon) Śliwa, X.Zhao & Lumbsch
Distribution: N - TAA (Nascimbene & al. 2022), Piem (Matteucci & al. 2013, Giordani & al. 2014). S - Camp, Cal (Puntillo 1996), Si (Grillo 1998, Grillo & Caniglia 2004).
Description: Thallus crustose, granular-warty to inconspicuous and hardly evident, pale grey to cream-coloured, without a distinct prothallus. Apothecia lecanorine, sessile, 0.3-1 mm across, usually crowded in small clusters, round or irregular in outline due to mutual compression, with a flat to slightly convex, pale brown to pale grey-brown, sometimes pruinose disc, and a thick, smooth, often crenulate, white-pruinose, finally often excluded thalline margin. Thalline exciple rich in algae, with a few crystals; epithecium brownish yellow, 10-13 µm thick, with abundant granular crystals which are insoluble in K but soluble in N; hymenium colourless, 50-70 µm high; paraphyses sparingly branched, 1-2 µm thick in lower part, the apical cells somewhat wider but not swollen; hypothecium colourless. Asci 8-spored, elongate-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 K/I+ blue outer layer, Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, (8-)11-13 x 4-7 µm. Photobiont chlorococcoid. Spot tests: thallus K- or K+ pale yellow, C- or C+ pale yellow, KC+ pale yellow, P-; apothecial margin K+ yellow, C+ and KC+ orange-brown, UV+ bright pink: apothecial disc C+ brown-orange. Chemistry: xanthones, mainly concentrated in the apothecial margin.
Note: on steeply inclined surfaces of basic siliceous rocks (especially basalt), sometimes on calciferous rocks. For further details see Laundon (2010).
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

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

Source: http://fungi.myspecies.info/all-fungi/lecanora-antiqua - CC BY-NC


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=723&lang=en
France, Brest


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=723&lang=en
France, Brest


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=723&lang=en
France, Brest


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=723&lang=en
France, Brest


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=723&lang=en
France, Brest


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=723&lang=en
France, Brest


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=723&lang=en
France, Brest


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=723&lang=en
France, Pleyben, mur de chapelle


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=723&lang=en
France, Pleyben, mur de chapelle


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=723&lang=en
France, Pleyben, mur de chapelle


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=723&lang=en
France, Pleyben, mur de chapelle


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=723&lang=en
France, Pleyben, mur de chapelle


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=723&lang=en
France, Pleyben, mur de chapelle