Physconia thorstenii A. Crespo & Divakar
in Divakar & al., Mycol. Res., 111: 1315, 2007.
Synonyms:
Description: Thallus foliose, heteromerous, dorsiventral, adnate, forming more or less orbicular, up to 6(-8) cm wide rosettes. Lobes linear, discrete to usually imbricate, 1-3 mm wide, flat to irregularly concave. Upper surface grey to grey-brown, uniformly or patchily and coasely white-pruinose, especially at lobe-tips, the margins often bearing up to 1 mm wide secondary lobules, most commonly in thallus centre. Lower surface tan to pale brown in the peripheral zone, dark brown to black in central parts, with black, squarrosely branched rhizines which may form a dense mat. Upper cortex prosoplectenchymatous in longitudinal section, but appearing paraplectenchymatous in transverse section, with thin-walled, rectangular cells, overlain by a 8-12 µm thick epinecral layer; medulla white; lower cortex prosoplectenchymatous. Apothecia common, lecanorine, sessile, 1-2 mm across, with a brown, often pruinose disc and a usually lobulate thalline margin. Epithecium brown; hymenium and hypothecium colourless; paraphyses slender, simple or forked in upper part, the apical cells clavate, with a thin, dark brown cap. Asci 8-spored, clavate, the K/I+ blue tholus penetrated by a faintly amyloid apical cushion with parallel or diverging flanks, the wall K/I-, surrounded by a K/I+ blue outer layer, Lecanora-type. Ascospores 1-septate, brown, ellipsoid, (24-)27-34(-40) x (12.5-)14.5-18 μm, with an ornamented perispore, thickened at septum but not at apices, Physconia-type. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances,
Growth form: Foliose, narrow lobed
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: very rare
Dry submediterranean belt: very rare
Humid submediterranean belt: very rare
Padanian area: absent
pH of the substrata:
1 2 3 4 5
Solar irradiation:
1 2 3 4 5
Aridity:
1 2 3 4 5
Eutrophication:
1 2 3 4 5
Poleotolerance:
0 1 2 3
Altitudinal distribution:
1 2 3 4 5 6
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
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Occurrence data
Predictive map
Modified from the original at: https://gzu.jacq.org/GZU000274058
GZU 000274058 - Crespo,A. & Divakar,P.K. s.n.
Date 2005-05-11
Location Spain
Label Madrid: Mataelpino
Habitat on Quercus
Habitus
Annotations MAF-Lich 14121
DNA 031
Growth form: Foliose, narrow lobed
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: very rare
Dry submediterranean belt: very rare
Humid submediterranean belt: very rare
Padanian area: absent
pH of the substrata:
| 1 | 2 | 3 | 4 | 5 |
Solar irradiation:
| 1 | 2 | 3 | 4 | 5 |
Aridity:
| 1 | 2 | 3 | 4 | 5 |
Eutrophication:
| 1 | 2 | 3 | 4 | 5 |
Poleotolerance:
| 0 | 1 | 2 | 3 |
Altitudinal distribution:
| 1 | 2 | 3 | 4 | 5 | 6 |
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map
