Protoparmeliopsis achariana (A.L. Sm.) Moberg & R. Sant.

in Santesson & al., Lichen-forming and lichenicolous fungi of Fennoscandia: 268, 2004. Basionym: Lecanora achariana A.L. Sm. - Monogr. Brit. Lich., 1: 261, 1918.
Synonyms: Lecanora cartilaginea (Ach.) Ach.
Distribution: C - Sar (Nöske 2000).
Description: Thallus crustose-placodioid to subfoliose, grey-green to pale yellowish green, epruinose or, rarely, slightly pruinose, loosely attached, forming distinct, more or less orbicular to irregular, often confluent rosettes. Lobes flat to slightly convex, attached only in central parts, otherwise free, often ascending in peripheral parts, 1-2 mm wide, contiguous to often overlapping, especially in the central parts of thallus. Lower surface whitish. Apothecia lecanorine, usually crowded in central parts, 1-3 mm across, sessile to substipitate, strongly constricted at base, with a flat, pale brown, epruinose disc, and a prominent, raised, persistent, smooth to crenulate thalline margin. Epithecium brown, with an epipsamma of very small crystals; hymenium colourless, 50-70 μm high, I+ blue; 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, 10-16 x 4-6 µm. Photobiont chlorococcoid. Spot tests: thallus and medulla K-, C-, KC-, P-, UV-, or medulla (rarely) K+ yellow turning red. Chemistry: upper cortex with usnic acid; medulla with zeorine and unknown triterpenoids.
Note: on exposed siliceous rocks, usually on the top of large boulders, sometimes overgrowing bryophytes; the only Italian station is from the summit of the Gennargentu Massif, where the species is fairly abundant. However, the species is also known from the Alps, outside the Italian territory, and should be looked for there.
Growth form: Crustose placodiomorph
Substrata: rocks
Photobiont: green algae other than 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: extremely rare
Montane belt: absent
Submediterranean belt: absent
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

Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (13498)
2001/11/25



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (13498)
2001/11/25


Triin Aimla; Owner: University of Tartu