Squamarina gypsacea (Sm.) Poelt
Mitt. bot. Staatss. München, 2: 539, 1958. Basionym: Lichen gypsaceus Sm. - Trans. Linn. Soc. London, 1: 81, 1791.
Synonyms: Lecanora crassa var. gypsacea (Sm.) Rabenh.; Lecanora fragilis Zahlbr. var. fragilis; Lecanora gypsacea (Sm.) Müll. Arg.; Lecanora smithii (Ach.) Ach.; Placodium gypsaceum (Sm.) Trevis.; Psoroma gypsaceum (Sm.) A. Massal.; Squamaria gypsacea (Sm.) Nyl.
Description: Thallus squamulose, rather firmly attached, consisting of usually dispersed, more or less isodiametrical to slightly elongate, concave, to 8 mm broad and to 3-5 mm thick squamules, the upper surface green, the margins conspicuously white; lower surface white at margins, dark in central parts. Upper cortex inspersed with pale brown granules dissolving in K, overlain by a thin epinecral layer; medulla white, very thick, filled with calcium oxalate crystals; lower cortex absent. Apothecia rather rare, 2-10 mm across, lecanorine/zeorine, sessile, with a flat to slightly convex, pale brown but sometimes slightly white-pruinose disc, a thin, often finally disappearing thalline margin and a rather thick proper margin. Cortex of thalline exciple similar to that of thallus; proper exciple reduced to a thin ring; epithecium brown with pale brown granules dissolving in K and calcium oxalate crystals; hymenium colourless, inspersed with granules dissolving in K, hemiamyloid; paraphyses mostly simple, c. 2 μm thick; hypothecium with pale brown granules dissolving in K, not subtended by an algal layer. Asci 8-spored, elongate-clavate, with a thin, outer amyloid layer and a thickened, amyloid tholus devoid of an ocular chamber, penetrated by an axial tube the sides of which stain I+ deeper blue, approaching the Porpidia-type. Ascospores 1-celled, hyaline, narrowly ellipsoid with rounded ends, (10-)11-15 x (4-)5-7 μm. Photobiont chlorococcoid. Spot tests: cortex K-, C-, KC- or KC+ yellowish, P , UV-; medulla P+ yellow. Chemistry: cortex with usnic and isousnic acid, medulla with psoromic and 2ʹ-O-demethylpsoromic acids.
Growth form: Squamulose
Substrata: rocks
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)
paras Romjularia lurida
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: extremely rare
Dry submediterranean belt: rare
Humid submediterranean belt: 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
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 (31676)
2001/12/11
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (31676)
2001/12/11
apothecium
Pier Luigi Nimis CC BY-SA 4.0
TSB 41732
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_S/Squamarina_gypsacea.htm
France, fisures de rochers - session AFL 2010 - Hérault - 34)
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_S/Squamarina_gypsacea.htm
France, fisures de rochers - session AFL 2010 - Hérault - 34)
Collezione lichenologica Abramo Massalongo del Museo di Storia Naturale G. Ligabue di Venezia - Autori: Seggi, Linda; Trabucco, Raffaella Proprietà: Fondazione Musei Civici di Venezia - CC BY-NC
Italy, Veneto, in M. Alba ad terram. 1855
as Psoroma gypsacea
Collezione lichenologica Abramo Massalongo del Museo di Storia Naturale G. Ligabue di Venezia - Autori: Seggi, Linda; Trabucco, Raffaella Proprietà: Fondazione Musei Civici di Venezia - CC BY-NC
Italy, Veneto, in M. Baldo
as Psoroma gypsacea
Growth form: Squamulose
Substrata: rocks
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)
paras Romjularia lurida
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: extremely rare
Dry submediterranean belt: rare
Humid submediterranean belt: 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
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 (31676)
2001/12/11
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (31676)
2001/12/11
apothecium
Pier Luigi Nimis CC BY-SA 4.0
TSB 41732
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_S/Squamarina_gypsacea.htm
France, fisures de rochers - session AFL 2010 - Hérault - 34)
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_S/Squamarina_gypsacea.htm
France, fisures de rochers - session AFL 2010 - Hérault - 34)
Collezione lichenologica Abramo Massalongo del Museo di Storia Naturale G. Ligabue di Venezia - Autori: Seggi, Linda; Trabucco, Raffaella Proprietà: Fondazione Musei Civici di Venezia - CC BY-NC
Italy, Veneto, in M. Alba ad terram. 1855
as Psoroma gypsacea
